718 GT4?
Advanced
Joined: Nov 2018
Posts: 96
Likes: 0
Advanced
Joined: Nov 2018
Posts: 96
Likes: 0
Perfectly reasonable question though. If you’re going to make statements that it has to be the same engine in the road car as the race car for GT4, how do you explain the fact that the Lotus Evora GT4 race car had an engine that never went into a production Lotus Evora road car? Or is it just that you’re making it up and you therefore can’t answer it?
Three Wheelin'
Joined: Jan 2017
Posts: 1,596
Likes: 308
From: Tucson, AZ
Rennlist Member
Joined: May 2008
Posts: 17,181
Likes: 309
From: Somewhere in a galaxy far, far away....
Advanced
Joined: Nov 2018
Posts: 96
Likes: 0
2. Sanctioning body in which it was run: SRO GT4 European Series (amongst others) - see link below.
http://www.lotus-verhiest.com/new-ca...cars/evora-gt4
As I say, the road car CAN have a different engine to the race car under GT4. So, in theory, the Cayman 718 GT4 Club Sport (race car) could have a different engine to the 718 GT4 road car.
Rennlist Member
Joined: May 2008
Posts: 17,181
Likes: 309
From: Somewhere in a galaxy far, far away....
1. Counterpart used: Lotus do not, and never have, built an Evora road car with a 4.0 normally aspirated engine.
2. Sanctioning body in which it was run: SRO GT4 European Series (amongst others) - see link below.
http://www.lotus-verhiest.com/new-ca...cars/evora-gt4
As I say, the road car CAN have a different engine to the race car under GT4. So, in theory, the Cayman 718 GT4 Club Sport (race car) could have a different engine to the 718 GT4 road car.
Advanced
Joined: Nov 2018
Posts: 96
Likes: 0
Lotus took the head and the block from the 3.5 litre (supercharged) V6 in the Evora S (road car), ditched the supercharger and added new crankshaft, new rods, new pistons, new camshafts, new valves and springs, all governed by a new Cosworth SQ6 ECU. The result was a 4.0 litre, 355bhp at 6500rpm, 328lb ft at 5500rpm engine that did not appear in one of their Evora road cars nor any of their other road cars.
Rennlist Member
Joined: May 2008
Posts: 17,181
Likes: 309
From: Somewhere in a galaxy far, far away....
Lotus took the head and the block from the 3.5 litre (supercharged) V6 in the Evora S (road car), ditched the supercharger and added new crankshaft, new rods, new pistons, new camshafts, new valves and springs, all governed by a new Cosworth SQ6 ECU. The result was a 4.0 litre, 355bhp at 6500rpm, 328lb ft at 5500rpm engine that did not appear in one of their Evora road cars nor any of their other road cars.
Being a 25 car minimum, one car a month minimum, small manufacture they are able to do tweaking with possible waivers in place for BoP.
Look at the GT4 mustang and GT4 camaro.
Not a plug and play engine with street car but based on them none the less.
The Porsche GT4 is basically a direct swap with the street car becuase it is already engineered to a high standard fit for motorsport duty. (Got to love porsche!) It also keeps price point reasonable.
Porsche wouldnt need to make the engine any different then the streer car because the BoP is already on their *** for low weight.
Porsche could build the GT4 engine into a bigger monster then the street engine using the same block. But it is not neccessary.
The key point in this topic here is using the same block in regards to the Lots Of Trouble Usually Serious Evora GT4.
Rennlist Member
Joined: May 2008
Posts: 17,181
Likes: 309
From: Somewhere in a galaxy far, far away....
1. Counterpart used: Lotus do not, and never have, built an Evora road car with a 4.0 normally aspirated engine.
2. Sanctioning body in which it was run: SRO GT4 European Series (amongst others) - see link below.
http://www.lotus-verhiest.com/new-ca...cars/evora-gt4
As I say, the road car CAN have a different engine to the race car under GT4. So, in theory, the Cayman 718 GT4 Club Sport (race car) could have a different engine to the 718 GT4 road car.
Not sure how that would work out for marketing given the sandbagging as well as explaining to BoP the added Bump in HP.
Rennlist Member
Joined: Jul 2015
Posts: 4,762
Likes: 1,501
I think TCSracing has provided more than enough info but here's a bit more than "an opinion or view".....
Taken from the SRO GT4 European Series Technical Regulations for GT4 Grand Touring Cars...which is basically THE RULES for all GT4s
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.
Taken from the SRO GT4 European Series Technical Regulations for GT4 Grand Touring Cars...which is basically THE RULES for all GT4s
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.
Advanced
Joined: Nov 2018
Posts: 96
Likes: 0
With the forthcoming 718 GT4 and whether the engine is the same in the race car as in the road car, you are confusing “likely to be the same” with “has to be the same”. There is nothing in the SRO GT4 regs that says the homologated race car has to have the same engine as the production road car on which it is based.
Advanced
Joined: Nov 2018
Posts: 96
Likes: 0
I think TCSracing has provided more than enough info but here's a bit more than "an opinion or view".....
Taken from the SRO GT4 European Series Technical Regulations for GT4 Grand Touring Cars...which is basically THE RULES for all GT4s
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.
Taken from the SRO GT4 European Series Technical Regulations for GT4 Grand Touring Cars...which is basically THE RULES for all GT4s
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.
“1.2 Original
As fitted to the SRO Motorsports Group-approved series-produced car and in compliance with their Technical Form.”
It doesn’t say “I’ll make up what ‘original’ means and deem it to mean ‘the same as in the road car’ because that’s what I think it means”!
Advanced
Joined: Nov 2018
Posts: 96
Likes: 0
Read the Definitions in the very same regulations you quote. Article 1.2 of the Definitions states:
“1.2 Original
As fitted to the SRO Motorsports Group-approved series-produced car and in compliance with their Technical Form.”
It doesn’t say “I’ll make up what ‘original’ means and deem it to mean ‘the same as in the road car’ because that’s what I think it means”!
Nordschleife Master
Joined: Aug 2016
Posts: 5,150
Likes: 3,271
Are you sure you want to add LordLucan to your ignore list?
This message is hidden because LordLucan is on your ignore list.
This message is hidden because LordLucan is on your ignore list.
Rennlist Member
Joined: Jan 2018
Posts: 209
Likes: 90
From: Sparks, NV
Are you sure you want to add LordLucan to your ignore list?
This message is hidden because LordLucan is on your ignore list.
This message is hidden because LordLucan is on your ignore list.
