718 GT4?
Rennlist Member
Joined: May 2008
Posts: 17,178
Likes: 309
From: Somewhere in a galaxy far, far away....
Racer
Joined: Dec 2011
Posts: 295
Likes: 100
Makes me want to cancel my deposit. Its terrible. Oh, and the sound on clubsports and street mules have been depressing. Been dreaming of this gen gt4 since I missed out on the first gen and nothing about this release looks promising.
Advanced
Joined: Nov 2018
Posts: 96
Likes: 0
You are essentially limited to the block. The bases of the build. What ever you can stuff into it, take off it or bolt-on to make it work reliably is the name of the game. BoP will ultimately determine how it is built HP wise.
You will see some might drop forced induction from the street motor in favor of increasing capasity and compression for the race motor. It is a game of give and take, cost and reliabilty.
There is no confusion with the 718 GT4 street motor and race motor being the same. They will be the same except the for the additional capacity of an extra litre of oil as we saw with the 981GT4.
SRO GT4 is production cars only. And they have to maintain the engine from production car. In some cases a waiver can be issued but is rare.
Manufactures never overlooked the rules by mistake..... They know full well the rules which is why you see all the GT4 race cars share motor (or block) with the street cars
You will see some might drop forced induction from the street motor in favor of increasing capasity and compression for the race motor. It is a game of give and take, cost and reliabilty.
There is no confusion with the 718 GT4 street motor and race motor being the same. They will be the same except the for the additional capacity of an extra litre of oil as we saw with the 981GT4.
SRO GT4 is production cars only. And they have to maintain the engine from production car. In some cases a waiver can be issued but is rare.
Manufactures never overlooked the rules by mistake..... They know full well the rules which is why you see all the GT4 race cars share motor (or block) with the street cars
Rennlist Member
Joined: May 2008
Posts: 17,178
Likes: 309
From: Somewhere in a galaxy far, far away....
So realistically, it comes down to block. The basis of the build.
Rennlist Member
Joined: Dec 2018
Posts: 536
Likes: 290
Hello - I'm new to the foum, but not to reading the great threads and debate on Rennlist. I have a 981 white GT4 and am based in the UK.
I have no intel on the new one at all just some stuff my dealer told me whcih I have no basis to repeat as I have no basis to believe it's true.
However, I read the above debate about regulations with interest. I looked a this a little while back and noticed a big difference in the 2017 GT4 European Series Regulations and the 2018 ones.
One specifically refers to original engine and one does not.
Is it relevant to the 718 GT4 specualtion? To save those who tell methis has been done to death you can stop here but I have copied the rleevant extracts below.
PS I love my 981 GT4 and look forward to benefitting from your guys advice ! - Snowy
The 2017 engine regulations for "2017 GT4 European Series" from SRO Motorsports Group were like this - source
https://www.google.com/url?sa=t&rct=...2ZOTD3rrCSWuq:
ARTICLE 5 : ENGINE
5.1 Type and position of engine
The make and type of engine used must remain original, unless by a waiver of the SRO GT4 Bureau.
The position of the engine, the location and orientation must remain original.
5.2 Engine control unit
The Technical Delegate may at any time oblige the competitor to use the reference unit registered with the SRO
Motorsports Group by the Manufacturer or Tuner.
5.3 Intake system
5.3.1) The intake system is defined by the assembly comprising the restrictor(s) (if applicable) and the manifold up to
the intake ports on the cylinder head(s).
5.3.2) All the air feeding the engine must pass through the homologated air restrictors (if applicable), and no pipe
containing air is permitted to enter or to exit from the intake system.
The restrictor(s) must be made of metal or metal alloy, 3 mm long and must be entirely visible once the bonnet is open
and without dismounting any element or cover.
Sealing the restrictors must cause the engine to stop immediately.
This check must be carried out at an engine speed of 2500 rpm, the pressure sensors present inside the intake system
being disconnected.
The depression measured in the intake system when the engine stops must be at least equal to the atmospheric
pressure in the place where the check is carried out minus 150 millibar, maintained during at least 0.5 seconds.
5.3.3) The SRO GT4 Bureau reserves the right to adjust the diameter of these air restrictors (if applicable) in order to
maintain the balance of performance between the cars.
5.4 Exhaust
5.4.1) The exhaust system must incorporate one or more homologated catalytic converters, which should be
functioning at all times and through which all exhaust gases should pass.
5.4.2) The noise generated by the car must not exceed 110 dB (A) at 3800 rpm, or at three-quarter maximum revs if
this is less.
This measurement will be taken at a distance of 0.5 m and at a 45 degree angle to the point of exit of the exhaust.
All measures taken to ensure that the maximum noise limits are not exceeded must be permanent in nature, and must
not be cancelled out by the exhaust gas pressure.
5.4.3) The exit of the exhaust pipe must be situated at the rear of the car, at a minimum of 100 mm from the ground.
Exhaust gas may only exit at the end of the system.
Parts of the chassis must not be used to evacuate exhaust gases.
Exhaust line protection are allowed
Whereas the 2018 regulations on the SRO Web-site look like this (source SRO web-site):
Title of this doc is: RACB Sport visa:T02-GT4T/B18 – 01/03/2018 GT4 - 2018
ARTICLE 5 : ENGINE
5.1 Engine control unit
The Technical Delegate may at any time oblige the competitor to use the reference unit registered with the SRO
Motorsports Group by the Manufacturer or Tuner.
5.2 Intake system
5.2.1) The intake system is defined by the assembly comprising the restrictor(s) (if applicable) and the manifold up
to the intake ports on the cylinder head(s).
5.2.2) All the air feeding the engine must pass through the homologated air restrictors (if applicable), and no pipe
containing air is permitted to enter or to exit from the intake system.
The restrictor(s) must be made of metal or metal alloy, 3 mm long and must be entirely visible once the bonnet is
open and without dismounting any element or cover.
Sealing the restrictors must cause the engine to stop immediately.
This check must be carried out at an engine speed of 2500 rpm, the pressure sensors present inside the intake
system being disconnected.
The depression measured in the intake system when the engine stops must be at least equal to the atmospheric
pressure in the place where the check is carried out minus 150 millibar, maintained during at least 0.5 seconds.
5.3.3) The SRO GT4 Bureau reserves the right to adjust the diameter of these air restrictors (if applicable) in order
to maintain the balance of performance between the cars.
5.3 Exhaust
5.3.1) The exhaust system must incorporate one or more homologated catalytic converters, which should be
functioning at all times and through which all exhaust gases should pass.
5.3.2) The noise generated by the car must not exceed 110 dB (A) at 3800 rpm, or at three-quarter maximum revs
if this is less.
This measurement will be taken at a distance of 0.5 m and at a 45 degree angle to the point of exit of the exhaust.
All measures taken to ensure that the maximum noise limits are not exceeded must be permanent in nature, and
must not be cancelled out by the exhaust gas pressure.
Exhaust gas may only exit at the end of the system.
Parts of the chassis must not be used to evacuate exhaust gases.
Exhaust line protection are allowed.
I have no intel on the new one at all just some stuff my dealer told me whcih I have no basis to repeat as I have no basis to believe it's true.
However, I read the above debate about regulations with interest. I looked a this a little while back and noticed a big difference in the 2017 GT4 European Series Regulations and the 2018 ones.
One specifically refers to original engine and one does not.
Is it relevant to the 718 GT4 specualtion? To save those who tell methis has been done to death you can stop here but I have copied the rleevant extracts below.
PS I love my 981 GT4 and look forward to benefitting from your guys advice ! - Snowy
The 2017 engine regulations for "2017 GT4 European Series" from SRO Motorsports Group were like this - source
https://www.google.com/url?sa=t&rct=...2ZOTD3rrCSWuq:
ARTICLE 5 : ENGINE
5.1 Type and position of engine
The make and type of engine used must remain original, unless by a waiver of the SRO GT4 Bureau.
The position of the engine, the location and orientation must remain original.
5.2 Engine control unit
The Technical Delegate may at any time oblige the competitor to use the reference unit registered with the SRO
Motorsports Group by the Manufacturer or Tuner.
5.3 Intake system
5.3.1) The intake system is defined by the assembly comprising the restrictor(s) (if applicable) and the manifold up to
the intake ports on the cylinder head(s).
5.3.2) All the air feeding the engine must pass through the homologated air restrictors (if applicable), and no pipe
containing air is permitted to enter or to exit from the intake system.
The restrictor(s) must be made of metal or metal alloy, 3 mm long and must be entirely visible once the bonnet is open
and without dismounting any element or cover.
Sealing the restrictors must cause the engine to stop immediately.
This check must be carried out at an engine speed of 2500 rpm, the pressure sensors present inside the intake system
being disconnected.
The depression measured in the intake system when the engine stops must be at least equal to the atmospheric
pressure in the place where the check is carried out minus 150 millibar, maintained during at least 0.5 seconds.
5.3.3) The SRO GT4 Bureau reserves the right to adjust the diameter of these air restrictors (if applicable) in order to
maintain the balance of performance between the cars.
5.4 Exhaust
5.4.1) The exhaust system must incorporate one or more homologated catalytic converters, which should be
functioning at all times and through which all exhaust gases should pass.
5.4.2) The noise generated by the car must not exceed 110 dB (A) at 3800 rpm, or at three-quarter maximum revs if
this is less.
This measurement will be taken at a distance of 0.5 m and at a 45 degree angle to the point of exit of the exhaust.
All measures taken to ensure that the maximum noise limits are not exceeded must be permanent in nature, and must
not be cancelled out by the exhaust gas pressure.
5.4.3) The exit of the exhaust pipe must be situated at the rear of the car, at a minimum of 100 mm from the ground.
Exhaust gas may only exit at the end of the system.
Parts of the chassis must not be used to evacuate exhaust gases.
Exhaust line protection are allowed
Whereas the 2018 regulations on the SRO Web-site look like this (source SRO web-site):
Title of this doc is: RACB Sport visa:T02-GT4T/B18 – 01/03/2018 GT4 - 2018
ARTICLE 5 : ENGINE
5.1 Engine control unit
The Technical Delegate may at any time oblige the competitor to use the reference unit registered with the SRO
Motorsports Group by the Manufacturer or Tuner.
5.2 Intake system
5.2.1) The intake system is defined by the assembly comprising the restrictor(s) (if applicable) and the manifold up
to the intake ports on the cylinder head(s).
5.2.2) All the air feeding the engine must pass through the homologated air restrictors (if applicable), and no pipe
containing air is permitted to enter or to exit from the intake system.
The restrictor(s) must be made of metal or metal alloy, 3 mm long and must be entirely visible once the bonnet is
open and without dismounting any element or cover.
Sealing the restrictors must cause the engine to stop immediately.
This check must be carried out at an engine speed of 2500 rpm, the pressure sensors present inside the intake
system being disconnected.
The depression measured in the intake system when the engine stops must be at least equal to the atmospheric
pressure in the place where the check is carried out minus 150 millibar, maintained during at least 0.5 seconds.
5.3.3) The SRO GT4 Bureau reserves the right to adjust the diameter of these air restrictors (if applicable) in order
to maintain the balance of performance between the cars.
5.3 Exhaust
5.3.1) The exhaust system must incorporate one or more homologated catalytic converters, which should be
functioning at all times and through which all exhaust gases should pass.
5.3.2) The noise generated by the car must not exceed 110 dB (A) at 3800 rpm, or at three-quarter maximum revs
if this is less.
This measurement will be taken at a distance of 0.5 m and at a 45 degree angle to the point of exit of the exhaust.
All measures taken to ensure that the maximum noise limits are not exceeded must be permanent in nature, and
must not be cancelled out by the exhaust gas pressure.
Exhaust gas may only exit at the end of the system.
Parts of the chassis must not be used to evacuate exhaust gases.
Exhaust line protection are allowed.
Drifting
Joined: May 2016
Posts: 2,033
Likes: 315
Advanced
Joined: Nov 2018
Posts: 96
Likes: 0
Hello - I'm new to the foum, but not to reading the great threads and debate on Rennlist. I have a 981 white GT4 and am based in the UK.
I have no intel on the new one at all just some stuff my dealer told me whcih I have no basis to repeat as I have no basis to believe it's true.
However, I read the above debate about regulations with interest. I looked a this a little while back and noticed a big difference in the 2017 GT4 European Series Regulations and the 2018 ones.
One specifically refers to original engine and one does not.
Is it relevant to the 718 GT4 specualtion? To save those who tell methis has been done to death you can stop here but I have copied the rleevant extracts below.
PS I love my 981 GT4 and look forward to benefitting from your guys advice ! - Snowy
The 2017 engine regulations for "2017 GT4 European Series" from SRO Motorsports Group were like this - source
https://www.google.com/url?sa=t&rct=...2ZOTD3rrCSWuq:
ARTICLE 5 : ENGINE
5.1 Type and position of engine
The make and type of engine used must remain original, unless by a waiver of the SRO GT4 Bureau.
The position of the engine, the location and orientation must remain original.
5.2 Engine control unit
The Technical Delegate may at any time oblige the competitor to use the reference unit registered with the SRO
Motorsports Group by the Manufacturer or Tuner.
5.3 Intake system
5.3.1) The intake system is defined by the assembly comprising the restrictor(s) (if applicable) and the manifold up to
the intake ports on the cylinder head(s).
5.3.2) All the air feeding the engine must pass through the homologated air restrictors (if applicable), and no pipe
containing air is permitted to enter or to exit from the intake system.
The restrictor(s) must be made of metal or metal alloy, 3 mm long and must be entirely visible once the bonnet is open
and without dismounting any element or cover.
Sealing the restrictors must cause the engine to stop immediately.
This check must be carried out at an engine speed of 2500 rpm, the pressure sensors present inside the intake system
being disconnected.
The depression measured in the intake system when the engine stops must be at least equal to the atmospheric
pressure in the place where the check is carried out minus 150 millibar, maintained during at least 0.5 seconds.
5.3.3) The SRO GT4 Bureau reserves the right to adjust the diameter of these air restrictors (if applicable) in order to
maintain the balance of performance between the cars.
5.4 Exhaust
5.4.1) The exhaust system must incorporate one or more homologated catalytic converters, which should be
functioning at all times and through which all exhaust gases should pass.
5.4.2) The noise generated by the car must not exceed 110 dB (A) at 3800 rpm, or at three-quarter maximum revs if
this is less.
This measurement will be taken at a distance of 0.5 m and at a 45 degree angle to the point of exit of the exhaust.
All measures taken to ensure that the maximum noise limits are not exceeded must be permanent in nature, and must
not be cancelled out by the exhaust gas pressure.
5.4.3) The exit of the exhaust pipe must be situated at the rear of the car, at a minimum of 100 mm from the ground.
Exhaust gas may only exit at the end of the system.
Parts of the chassis must not be used to evacuate exhaust gases.
Exhaust line protection are allowed
Whereas the 2018 regulations on the SRO Web-site look like this (source SRO web-site):
Title of this doc is: RACB Sport visa:T02-GT4T/B18 – 01/03/2018 GT4 - 2018
ARTICLE 5 : ENGINE
5.1 Engine control unit
The Technical Delegate may at any time oblige the competitor to use the reference unit registered with the SRO
Motorsports Group by the Manufacturer or Tuner.
5.2 Intake system
5.2.1) The intake system is defined by the assembly comprising the restrictor(s) (if applicable) and the manifold up
to the intake ports on the cylinder head(s).
5.2.2) All the air feeding the engine must pass through the homologated air restrictors (if applicable), and no pipe
containing air is permitted to enter or to exit from the intake system.
The restrictor(s) must be made of metal or metal alloy, 3 mm long and must be entirely visible once the bonnet is
open and without dismounting any element or cover.
Sealing the restrictors must cause the engine to stop immediately.
This check must be carried out at an engine speed of 2500 rpm, the pressure sensors present inside the intake
system being disconnected.
The depression measured in the intake system when the engine stops must be at least equal to the atmospheric
pressure in the place where the check is carried out minus 150 millibar, maintained during at least 0.5 seconds.
5.3.3) The SRO GT4 Bureau reserves the right to adjust the diameter of these air restrictors (if applicable) in order
to maintain the balance of performance between the cars.
5.3 Exhaust
5.3.1) The exhaust system must incorporate one or more homologated catalytic converters, which should be
functioning at all times and through which all exhaust gases should pass.
5.3.2) The noise generated by the car must not exceed 110 dB (A) at 3800 rpm, or at three-quarter maximum revs
if this is less.
This measurement will be taken at a distance of 0.5 m and at a 45 degree angle to the point of exit of the exhaust.
All measures taken to ensure that the maximum noise limits are not exceeded must be permanent in nature, and
must not be cancelled out by the exhaust gas pressure.
Exhaust gas may only exit at the end of the system.
Parts of the chassis must not be used to evacuate exhaust gases.
Exhaust line protection are allowed.
I have no intel on the new one at all just some stuff my dealer told me whcih I have no basis to repeat as I have no basis to believe it's true.
However, I read the above debate about regulations with interest. I looked a this a little while back and noticed a big difference in the 2017 GT4 European Series Regulations and the 2018 ones.
One specifically refers to original engine and one does not.
Is it relevant to the 718 GT4 specualtion? To save those who tell methis has been done to death you can stop here but I have copied the rleevant extracts below.
PS I love my 981 GT4 and look forward to benefitting from your guys advice ! - Snowy
The 2017 engine regulations for "2017 GT4 European Series" from SRO Motorsports Group were like this - source
https://www.google.com/url?sa=t&rct=...2ZOTD3rrCSWuq:
ARTICLE 5 : ENGINE
5.1 Type and position of engine
The make and type of engine used must remain original, unless by a waiver of the SRO GT4 Bureau.
The position of the engine, the location and orientation must remain original.
5.2 Engine control unit
The Technical Delegate may at any time oblige the competitor to use the reference unit registered with the SRO
Motorsports Group by the Manufacturer or Tuner.
5.3 Intake system
5.3.1) The intake system is defined by the assembly comprising the restrictor(s) (if applicable) and the manifold up to
the intake ports on the cylinder head(s).
5.3.2) All the air feeding the engine must pass through the homologated air restrictors (if applicable), and no pipe
containing air is permitted to enter or to exit from the intake system.
The restrictor(s) must be made of metal or metal alloy, 3 mm long and must be entirely visible once the bonnet is open
and without dismounting any element or cover.
Sealing the restrictors must cause the engine to stop immediately.
This check must be carried out at an engine speed of 2500 rpm, the pressure sensors present inside the intake system
being disconnected.
The depression measured in the intake system when the engine stops must be at least equal to the atmospheric
pressure in the place where the check is carried out minus 150 millibar, maintained during at least 0.5 seconds.
5.3.3) The SRO GT4 Bureau reserves the right to adjust the diameter of these air restrictors (if applicable) in order to
maintain the balance of performance between the cars.
5.4 Exhaust
5.4.1) The exhaust system must incorporate one or more homologated catalytic converters, which should be
functioning at all times and through which all exhaust gases should pass.
5.4.2) The noise generated by the car must not exceed 110 dB (A) at 3800 rpm, or at three-quarter maximum revs if
this is less.
This measurement will be taken at a distance of 0.5 m and at a 45 degree angle to the point of exit of the exhaust.
All measures taken to ensure that the maximum noise limits are not exceeded must be permanent in nature, and must
not be cancelled out by the exhaust gas pressure.
5.4.3) The exit of the exhaust pipe must be situated at the rear of the car, at a minimum of 100 mm from the ground.
Exhaust gas may only exit at the end of the system.
Parts of the chassis must not be used to evacuate exhaust gases.
Exhaust line protection are allowed
Whereas the 2018 regulations on the SRO Web-site look like this (source SRO web-site):
Title of this doc is: RACB Sport visa:T02-GT4T/B18 – 01/03/2018 GT4 - 2018
ARTICLE 5 : ENGINE
5.1 Engine control unit
The Technical Delegate may at any time oblige the competitor to use the reference unit registered with the SRO
Motorsports Group by the Manufacturer or Tuner.
5.2 Intake system
5.2.1) The intake system is defined by the assembly comprising the restrictor(s) (if applicable) and the manifold up
to the intake ports on the cylinder head(s).
5.2.2) All the air feeding the engine must pass through the homologated air restrictors (if applicable), and no pipe
containing air is permitted to enter or to exit from the intake system.
The restrictor(s) must be made of metal or metal alloy, 3 mm long and must be entirely visible once the bonnet is
open and without dismounting any element or cover.
Sealing the restrictors must cause the engine to stop immediately.
This check must be carried out at an engine speed of 2500 rpm, the pressure sensors present inside the intake
system being disconnected.
The depression measured in the intake system when the engine stops must be at least equal to the atmospheric
pressure in the place where the check is carried out minus 150 millibar, maintained during at least 0.5 seconds.
5.3.3) The SRO GT4 Bureau reserves the right to adjust the diameter of these air restrictors (if applicable) in order
to maintain the balance of performance between the cars.
5.3 Exhaust
5.3.1) The exhaust system must incorporate one or more homologated catalytic converters, which should be
functioning at all times and through which all exhaust gases should pass.
5.3.2) The noise generated by the car must not exceed 110 dB (A) at 3800 rpm, or at three-quarter maximum revs
if this is less.
This measurement will be taken at a distance of 0.5 m and at a 45 degree angle to the point of exit of the exhaust.
All measures taken to ensure that the maximum noise limits are not exceeded must be permanent in nature, and
must not be cancelled out by the exhaust gas pressure.
Exhaust gas may only exit at the end of the system.
Parts of the chassis must not be used to evacuate exhaust gases.
Exhaust line protection are allowed.
Advanced
Joined: Nov 2018
Posts: 96
Likes: 0
Hello - I'm new to the foum, but not to reading the great threads and debate on Rennlist. I have a 981 white GT4 and am based in the UK.
I have no intel on the new one at all just some stuff my dealer told me whcih I have no basis to repeat as I have no basis to believe it's true.
However, I read the above debate about regulations with interest. I looked a this a little while back and noticed a big difference in the 2017 GT4 European Series Regulations and the 2018 ones.
One specifically refers to original engine and one does not.
Is it relevant to the 718 GT4 specualtion? To save those who tell methis has been done to death you can stop here but I have copied the rleevant extracts below.
PS I love my 981 GT4 and look forward to benefitting from your guys advice ! - Snowy
The 2017 engine regulations for "2017 GT4 European Series" from SRO Motorsports Group were like this - source
https://www.google.com/url?sa=t&rct=...2ZOTD3rrCSWuq:
ARTICLE 5 : ENGINE
5.1 Type and position of engine
The make and type of engine used must remain original, unless by a waiver of the SRO GT4 Bureau.
The position of the engine, the location and orientation must remain original.
5.2 Engine control unit
The Technical Delegate may at any time oblige the competitor to use the reference unit registered with the SRO
Motorsports Group by the Manufacturer or Tuner.
5.3 Intake system
5.3.1) The intake system is defined by the assembly comprising the restrictor(s) (if applicable) and the manifold up to
the intake ports on the cylinder head(s).
5.3.2) All the air feeding the engine must pass through the homologated air restrictors (if applicable), and no pipe
containing air is permitted to enter or to exit from the intake system.
The restrictor(s) must be made of metal or metal alloy, 3 mm long and must be entirely visible once the bonnet is open
and without dismounting any element or cover.
Sealing the restrictors must cause the engine to stop immediately.
This check must be carried out at an engine speed of 2500 rpm, the pressure sensors present inside the intake system
being disconnected.
The depression measured in the intake system when the engine stops must be at least equal to the atmospheric
pressure in the place where the check is carried out minus 150 millibar, maintained during at least 0.5 seconds.
5.3.3) The SRO GT4 Bureau reserves the right to adjust the diameter of these air restrictors (if applicable) in order to
maintain the balance of performance between the cars.
5.4 Exhaust
5.4.1) The exhaust system must incorporate one or more homologated catalytic converters, which should be
functioning at all times and through which all exhaust gases should pass.
5.4.2) The noise generated by the car must not exceed 110 dB (A) at 3800 rpm, or at three-quarter maximum revs if
this is less.
This measurement will be taken at a distance of 0.5 m and at a 45 degree angle to the point of exit of the exhaust.
All measures taken to ensure that the maximum noise limits are not exceeded must be permanent in nature, and must
not be cancelled out by the exhaust gas pressure.
5.4.3) The exit of the exhaust pipe must be situated at the rear of the car, at a minimum of 100 mm from the ground.
Exhaust gas may only exit at the end of the system.
Parts of the chassis must not be used to evacuate exhaust gases.
Exhaust line protection are allowed
Whereas the 2018 regulations on the SRO Web-site look like this (source SRO web-site):
Title of this doc is: RACB Sport visa:T02-GT4T/B18 – 01/03/2018 GT4 - 2018
ARTICLE 5 : ENGINE
5.1 Engine control unit
The Technical Delegate may at any time oblige the competitor to use the reference unit registered with the SRO
Motorsports Group by the Manufacturer or Tuner.
5.2 Intake system
5.2.1) The intake system is defined by the assembly comprising the restrictor(s) (if applicable) and the manifold up
to the intake ports on the cylinder head(s).
5.2.2) All the air feeding the engine must pass through the homologated air restrictors (if applicable), and no pipe
containing air is permitted to enter or to exit from the intake system.
The restrictor(s) must be made of metal or metal alloy, 3 mm long and must be entirely visible once the bonnet is
open and without dismounting any element or cover.
Sealing the restrictors must cause the engine to stop immediately.
This check must be carried out at an engine speed of 2500 rpm, the pressure sensors present inside the intake
system being disconnected.
The depression measured in the intake system when the engine stops must be at least equal to the atmospheric
pressure in the place where the check is carried out minus 150 millibar, maintained during at least 0.5 seconds.
5.3.3) The SRO GT4 Bureau reserves the right to adjust the diameter of these air restrictors (if applicable) in order
to maintain the balance of performance between the cars.
5.3 Exhaust
5.3.1) The exhaust system must incorporate one or more homologated catalytic converters, which should be
functioning at all times and through which all exhaust gases should pass.
5.3.2) The noise generated by the car must not exceed 110 dB (A) at 3800 rpm, or at three-quarter maximum revs
if this is less.
This measurement will be taken at a distance of 0.5 m and at a 45 degree angle to the point of exit of the exhaust.
All measures taken to ensure that the maximum noise limits are not exceeded must be permanent in nature, and
must not be cancelled out by the exhaust gas pressure.
Exhaust gas may only exit at the end of the system.
Parts of the chassis must not be used to evacuate exhaust gases.
Exhaust line protection are allowed.
I have no intel on the new one at all just some stuff my dealer told me whcih I have no basis to repeat as I have no basis to believe it's true.
However, I read the above debate about regulations with interest. I looked a this a little while back and noticed a big difference in the 2017 GT4 European Series Regulations and the 2018 ones.
One specifically refers to original engine and one does not.
Is it relevant to the 718 GT4 specualtion? To save those who tell methis has been done to death you can stop here but I have copied the rleevant extracts below.
PS I love my 981 GT4 and look forward to benefitting from your guys advice ! - Snowy
The 2017 engine regulations for "2017 GT4 European Series" from SRO Motorsports Group were like this - source
https://www.google.com/url?sa=t&rct=...2ZOTD3rrCSWuq:
ARTICLE 5 : ENGINE
5.1 Type and position of engine
The make and type of engine used must remain original, unless by a waiver of the SRO GT4 Bureau.
The position of the engine, the location and orientation must remain original.
5.2 Engine control unit
The Technical Delegate may at any time oblige the competitor to use the reference unit registered with the SRO
Motorsports Group by the Manufacturer or Tuner.
5.3 Intake system
5.3.1) The intake system is defined by the assembly comprising the restrictor(s) (if applicable) and the manifold up to
the intake ports on the cylinder head(s).
5.3.2) All the air feeding the engine must pass through the homologated air restrictors (if applicable), and no pipe
containing air is permitted to enter or to exit from the intake system.
The restrictor(s) must be made of metal or metal alloy, 3 mm long and must be entirely visible once the bonnet is open
and without dismounting any element or cover.
Sealing the restrictors must cause the engine to stop immediately.
This check must be carried out at an engine speed of 2500 rpm, the pressure sensors present inside the intake system
being disconnected.
The depression measured in the intake system when the engine stops must be at least equal to the atmospheric
pressure in the place where the check is carried out minus 150 millibar, maintained during at least 0.5 seconds.
5.3.3) The SRO GT4 Bureau reserves the right to adjust the diameter of these air restrictors (if applicable) in order to
maintain the balance of performance between the cars.
5.4 Exhaust
5.4.1) The exhaust system must incorporate one or more homologated catalytic converters, which should be
functioning at all times and through which all exhaust gases should pass.
5.4.2) The noise generated by the car must not exceed 110 dB (A) at 3800 rpm, or at three-quarter maximum revs if
this is less.
This measurement will be taken at a distance of 0.5 m and at a 45 degree angle to the point of exit of the exhaust.
All measures taken to ensure that the maximum noise limits are not exceeded must be permanent in nature, and must
not be cancelled out by the exhaust gas pressure.
5.4.3) The exit of the exhaust pipe must be situated at the rear of the car, at a minimum of 100 mm from the ground.
Exhaust gas may only exit at the end of the system.
Parts of the chassis must not be used to evacuate exhaust gases.
Exhaust line protection are allowed
Whereas the 2018 regulations on the SRO Web-site look like this (source SRO web-site):
Title of this doc is: RACB Sport visa:T02-GT4T/B18 – 01/03/2018 GT4 - 2018
ARTICLE 5 : ENGINE
5.1 Engine control unit
The Technical Delegate may at any time oblige the competitor to use the reference unit registered with the SRO
Motorsports Group by the Manufacturer or Tuner.
5.2 Intake system
5.2.1) The intake system is defined by the assembly comprising the restrictor(s) (if applicable) and the manifold up
to the intake ports on the cylinder head(s).
5.2.2) All the air feeding the engine must pass through the homologated air restrictors (if applicable), and no pipe
containing air is permitted to enter or to exit from the intake system.
The restrictor(s) must be made of metal or metal alloy, 3 mm long and must be entirely visible once the bonnet is
open and without dismounting any element or cover.
Sealing the restrictors must cause the engine to stop immediately.
This check must be carried out at an engine speed of 2500 rpm, the pressure sensors present inside the intake
system being disconnected.
The depression measured in the intake system when the engine stops must be at least equal to the atmospheric
pressure in the place where the check is carried out minus 150 millibar, maintained during at least 0.5 seconds.
5.3.3) The SRO GT4 Bureau reserves the right to adjust the diameter of these air restrictors (if applicable) in order
to maintain the balance of performance between the cars.
5.3 Exhaust
5.3.1) The exhaust system must incorporate one or more homologated catalytic converters, which should be
functioning at all times and through which all exhaust gases should pass.
5.3.2) The noise generated by the car must not exceed 110 dB (A) at 3800 rpm, or at three-quarter maximum revs
if this is less.
This measurement will be taken at a distance of 0.5 m and at a 45 degree angle to the point of exit of the exhaust.
All measures taken to ensure that the maximum noise limits are not exceeded must be permanent in nature, and
must not be cancelled out by the exhaust gas pressure.
Exhaust gas may only exit at the end of the system.
Parts of the chassis must not be used to evacuate exhaust gases.
Exhaust line protection are allowed.
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Joined: Nov 2018
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I find it difficult to belive that something so fundamental as what you're asserting (that it has to be the same block in the race car as in the road car) would be left as an "unwritten rule" by the governing body of a hugely competitive, highly structured sport. If it's not written, it's not a rule.
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Joined: Jan 2018
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From: Sparks, NV
Good thing there are soooo many 981 GT4s for sale.
Advanced
Joined: Nov 2018
Posts: 96
Likes: 0
So true. It's probably the ugliest car I have ever seen. The very slight design tweak to the wheels is horrendous. The change from a center exhaust is disgusting. The replacement of a faux diffuser to a real one is ghastly. Those taillights? I mean, I know they are the exact same shape, but they changed the interior design. Blah! And don't get me started on the exhaust sound...I know it's just a phone recording from far away on a track, and no way to know if the car has the valves opened or closed but, yuck!
Good thing there are soooo many 981 GT4s for sale.
Good thing there are soooo many 981 GT4s for sale.
Rennlist Member
Joined: May 2008
Posts: 17,178
Likes: 309
From: Somewhere in a galaxy far, far away....
Manufactures know this which is why they do not try to interpret it as a way to give the race car a different engine from the street car.
Rennlist Member
Joined: May 2008
Posts: 17,178
Likes: 309
From: Somewhere in a galaxy far, far away....
Rennlist Member
Joined: May 2008
Posts: 17,178
Likes: 309
From: Somewhere in a galaxy far, far away....
I find it difficult to belive that something so fundamental as what you're asserting (that it has to be the same block in the race car as in the road car) would be left as an "unwritten rule" by the governing body of a hugely competitive, highly structured sport. If it's not written, it's not a rule.
This in not an oversight by manufactures. I can assure you that their racing departments have studied and inquired about any and all rules outlined in the regulations.
GT4 racing is racing with cars based on the street car in which 25+ have to built by small manufacture for road use and 100+ by large manufacture for road use.
This dosnt mean that maunfactures can then take the road car and stuff a totally different motor in it for the race version. They would need a waiver for that.
Porsche could apply for a waiver to build street turbo car and 3.8L race car however i do not know if it would be accepted.