718 GT4RS
08-19-2020, 12:40 PM
#721
As for the injectors, it’s trivial to change fuel systems. Aftermarket companies do it all the time. On my STi, one of the mods to support larger turbo is new injectors/fuel pump. It was ~$1500 total to overhaul the fuel system. Porsche can figure it out.
08-19-2020, 12:56 PM
#722
Limited production? Numbered?
As for the injectors, it’s trivial to change fuel systems. Aftermarket companies do it all the time. On my STi, one of the mods to support larger turbo is new injectors/fuel pump. It was ~$1500 total to overhaul the fuel system. Porsche can figure it out.
As for the injectors, it’s trivial to change fuel systems. Aftermarket companies do it all the time. On my STi, one of the mods to support larger turbo is new injectors/fuel pump. It was ~$1500 total to overhaul the fuel system. Porsche can figure it out.
Trust me...it wont be a $1500 if they go that way as this is no aftermarket mod. It need to prove reliable even when taken to the track, and with a warranty.
They also need to source the necessary parts for X amount of RS units, modify the production line, development, testing, etc..... Automakers don't work that way.
Might as well use the GT3 engine and find a place for the dry sump tank.
08-19-2020, 01:52 PM
#723
Trust me...it wont be a $1500 if they go that way as this is no aftermarket mod. It need to prove reliable even when taken to the track, and with a warranty.
They also need to source the necessary parts for X amount of RS units, modify the production line, development, testing, etc..... Automakers don't work that way.
Might as well use the GT3 engine and find a place for the dry sump tank.
They also need to source the necessary parts for X amount of RS units, modify the production line, development, testing, etc..... Automakers don't work that way.
Might as well use the GT3 engine and find a place for the dry sump tank.
My point is that Porsche can figure it out and for less cost than trying to fit the GT3 motor (they will never do this and have said detuning that motor changes driveability) or building a new one. They can fit in the GT3 fuel components and do some r&d as an example.
08-19-2020, 05:50 PM
#724
Intermediate
IIRC DeMan Motorsports gets this power (500 WHP) out of the 981 GT4 with mostly off the shelf Porsche parts, some machining of the heads/bore (4.5L displacement) and a software upgrade. I have not heard if they mate a PDK with is package. So Porsche could certainly create a similar package and make it reliable.
08-19-2020, 06:05 PM
#725
Rennlist Member
IIRC DeMan Motorsports gets this power (500 WHP) out of the 981 GT4 with mostly off the shelf Porsche parts, some machining of the heads/bore (4.5L displacement) and a software upgrade. I have not heard if they mate a PDK with is package. So Porsche could certainly create a similar package and make it reliable.
08-19-2020, 06:16 PM
#726
Rennlist Member
We'll see how the deman 4.5 engine holds up to regular track use over several years. So far so good and I don't wish them ill, but they don't have the same level of engineers and I think Porsche would have increased the engine displacement further if they felt it would be reliable.
08-19-2020, 09:32 PM
#727
Rennlist Member
However, Porsche has never made a street legal car with more than 4.0L before because its much harder to make a reliable engine the bigger it gets. That is physics. Porsche is most focused on their bottom line and not paying warranty claims from blown high displacement engines.
08-19-2020, 11:09 PM
#728
Agree they want to maintain the model hierarchy. Porsche could certainly fit the 991.2 GT3 engine into the GT4/GT4RS if they really wanted to.
However, Porsche has never made a street legal car with more than 4.0L before because its much harder to make a reliable engine the bigger it gets. That is physics. Porsche is most focused on their bottom line and not paying warranty claims from blown high displacement engines.
However, Porsche has never made a street legal car with more than 4.0L before because its much harder to make a reliable engine the bigger it gets. That is physics. Porsche is most focused on their bottom line and not paying warranty claims from blown high displacement engines.
I can’t wait for the actual press release on this car. There are so many wild guesses that someone is bound to be correct.
08-19-2020, 11:15 PM
#729
IIRC DeMan Motorsports gets this power (500 WHP) out of the 981 GT4 with mostly off the shelf Porsche parts, some machining of the heads/bore (4.5L displacement) and a software upgrade. I have not heard if they mate a PDK with is package. So Porsche could certainly create a similar package and make it reliable.
They (Deman) have done GT4 CSs with their 4.5L kit.......those are PDK, same one on all the Boxster/Cayman models.
08-20-2020, 01:13 AM
#730
RL Community Team
Rennlist Member
Rennlist Member
Porsche is not putting a 4.0L in any Cayman.
The following users liked this post:
ajw45 (08-21-2020)
08-20-2020, 01:21 AM
#732
Race Director
Originally Posted by Drifting
Agree they want to maintain the model hierarchy. Porsche could certainly fit the 991.2 GT3 engine into the GT4/GT4RS if they really wanted to.
However, Porsche has never made a street legal car with more than 4.0L before because its much harder to make a reliable engine the bigger it gets. That is physics. Porsche is most focused on their bottom line and not paying warranty claims from blown high displacement engines.
However, Porsche has never made a street legal car with more than 4.0L before because its much harder to make a reliable engine the bigger it gets. That is physics. Porsche is most focused on their bottom line and not paying warranty claims from blown high displacement engines.
Originally Posted by ipse dixit
Porsche is not putting a 4.0L in any Cayman.
https://www.autoblog.com/2020/06/24/...40-gt4-spyder/
Last edited by CAlexio; 08-20-2020 at 01:23 AM.
08-20-2020, 01:26 AM
#733
RL Community Team
Rennlist Member
Rennlist Member
The cayman already has a 4.0, in both gts and Gt4 guise? Again... let's keep things at least moderately correlated to reality.
https://www.autoblog.com/2020/06/24/...40-gt4-spyder/
I meant to say 4.0L GT3 engine.
Sorry, brain lock on my part.
08-20-2020, 01:29 AM
#734
Burning Brakes
They've already said it doesn't fit so yeah..not gonna happen.
About the whole big displacement realiability thing well...I've got 8.3 liters sitting in the garage that's been beat on for the last 15 years. Still hasn't broken anything.
About the whole big displacement realiability thing well...I've got 8.3 liters sitting in the garage that's been beat on for the last 15 years. Still hasn't broken anything.
08-20-2020, 01:47 AM
#735
Porsche should drag out the press release for another year just so we can have that many more wild guesses
But I suspect some of these wild guesses that you refer aren't really wild guesses at all
speculation is the lifeblood of rennlist
But I suspect some of these wild guesses that you refer aren't really wild guesses at all
speculation is the lifeblood of rennlist