.2GT3RS speculation/information thread.
09-28-2017, 04:53 PM
#137
09-28-2017, 10:32 PM
#138
Rennlist Member
All this talk about increased displacement... how is that gonna come?
Most engine breakthroughs in Porsche history trickled down from motorsport. The '74 3.0 from the '73 2.8RSR. The two evolutions of the 930 from the 934/935. The '92 3.3S from IMSA SCC. That list goes on an on, incl. the recent 997 4.0 from the GT3/GTE car.
At the moment the motorsport lineup just doesn't have anything remotely hinting at increased displacement. If anything the R&D appears to have gone *the other way round*. The GT3 car runs a derivative of the the street 3.8 MA175. The new Cup runs a derivative of the street 4.0 MA176. And they're all at 4.0L.
Those convinced that we're looking at a bigger engine, please enlighten... I so wish that I'm wrong on this one.
Most engine breakthroughs in Porsche history trickled down from motorsport. The '74 3.0 from the '73 2.8RSR. The two evolutions of the 930 from the 934/935. The '92 3.3S from IMSA SCC. That list goes on an on, incl. the recent 997 4.0 from the GT3/GTE car.
At the moment the motorsport lineup just doesn't have anything remotely hinting at increased displacement. If anything the R&D appears to have gone *the other way round*. The GT3 car runs a derivative of the the street 3.8 MA175. The new Cup runs a derivative of the street 4.0 MA176. And they're all at 4.0L.
Those convinced that we're looking at a bigger engine, please enlighten... I so wish that I'm wrong on this one.
09-28-2017, 11:32 PM
#139
Rennlist Member
All this talk about increased displacement... how is that gonna come?
Most engine breakthroughs in Porsche history trickled down from motorsport. The '74 3.0 from the '73 2.8RSR. The two evolutions of the 930 from the 934/935. The '92 3.3S from IMSA SCC. That list goes on an on, incl. the recent 997 4.0 from the GT3/GTE car.
At the moment the motorsport lineup just doesn't have anything remotely hinting at increased displacement. If anything the R&D appears to have gone *the other way round*. The GT3 car runs a derivative of the the street 3.8 MA175. The new Cup runs a derivative of the street 4.0 MA176. And they're all at 4.0L.
Those convinced that we're looking at a bigger engine, please enlighten... I so wish that I'm wrong on this one.
Most engine breakthroughs in Porsche history trickled down from motorsport. The '74 3.0 from the '73 2.8RSR. The two evolutions of the 930 from the 934/935. The '92 3.3S from IMSA SCC. That list goes on an on, incl. the recent 997 4.0 from the GT3/GTE car.
At the moment the motorsport lineup just doesn't have anything remotely hinting at increased displacement. If anything the R&D appears to have gone *the other way round*. The GT3 car runs a derivative of the the street 3.8 MA175. The new Cup runs a derivative of the street 4.0 MA176. And they're all at 4.0L.
Those convinced that we're looking at a bigger engine, please enlighten... I so wish that I'm wrong on this one.
Completely agree with you. Everyone keeps talking about a 4.2 RS when Porsche has never made a 911 Motorsport variant with that size of engine.
Just wishing for a 4.2L 991.2 RS isn't the same thing as any real evidence that Porsche will suddenly do something so out of character.
09-29-2017, 03:23 AM
#140
Forget torque, it’s easy to make mistakes comparing torque unless you factor in tire sizes, final drive, gearing, etc. Just compare power at any given speed to realize relative specific acceleration.
The RS makes way more power vs speed when appropriately using each PDK gear, and should blow away thr GT4 pure acceleration-wise even factoring in the weight difference.
The RS makes way more power vs speed when appropriately using each PDK gear, and should blow away thr GT4 pure acceleration-wise even factoring in the weight difference.
Been thinking.
The GT3RS really needs more TQ or needs to be regeared.
Part of the speed of going to 19” is the smaller diameter rear tire.
I mean a regeared breathed-on manual GT4 on smaller rears can pull me in some corners because it’s the same TQ, less weight.
So Porsche needs to either make it lighter, fit more reasonable size rear tires, regear a lot for lower top speed OR go bigger displacement.
So maybe bigger then 4.0 is actually easier, cheaper to produce then all the above..
Just GT2RS Tires and a 9000RPM 4.0 won’t do enough to make it faster then a GT3 and a GT3 already will have trouble keeping up with the ever faster turbo non GT cars because TQ.
The GT3RS really needs more TQ or needs to be regeared.
Part of the speed of going to 19” is the smaller diameter rear tire.
I mean a regeared breathed-on manual GT4 on smaller rears can pull me in some corners because it’s the same TQ, less weight.
So Porsche needs to either make it lighter, fit more reasonable size rear tires, regear a lot for lower top speed OR go bigger displacement.
So maybe bigger then 4.0 is actually easier, cheaper to produce then all the above..
Just GT2RS Tires and a 9000RPM 4.0 won’t do enough to make it faster then a GT3 and a GT3 already will have trouble keeping up with the ever faster turbo non GT cars because TQ.
10-22-2017, 11:25 PM
#143
10-22-2017, 11:37 PM
#144
Race Director
All this talk about increased displacement... how is that gonna come?
Most engine breakthroughs in Porsche history trickled down from motorsport. The '74 3.0 from the '73 2.8RSR. The two evolutions of the 930 from the 934/935. The '92 3.3S from IMSA SCC. That list goes on an on, incl. the recent 997 4.0 from the GT3/GTE car.
At the moment the motorsport lineup just doesn't have anything remotely hinting at increased displacement. If anything the R&D appears to have gone *the other way round*. The GT3 car runs a derivative of the the street 3.8 MA175. The new Cup runs a derivative of the street 4.0 MA176. And they're all at 4.0L.
Those convinced that we're looking at a bigger engine, please enlighten... I so wish that I'm wrong on this one.
Most engine breakthroughs in Porsche history trickled down from motorsport. The '74 3.0 from the '73 2.8RSR. The two evolutions of the 930 from the 934/935. The '92 3.3S from IMSA SCC. That list goes on an on, incl. the recent 997 4.0 from the GT3/GTE car.
At the moment the motorsport lineup just doesn't have anything remotely hinting at increased displacement. If anything the R&D appears to have gone *the other way round*. The GT3 car runs a derivative of the the street 3.8 MA175. The new Cup runs a derivative of the street 4.0 MA176. And they're all at 4.0L.
Those convinced that we're looking at a bigger engine, please enlighten... I so wish that I'm wrong on this one.
but who knows.. winter is coming.
10-22-2017, 11:43 PM
#146
Rennlist Member
i am Jon Snow and I know nothing. However, AP made a point of saying how the new hard-lash valve gt3.2 engine reliably made up to 600hp on the test bed. They they are clearly building this engine for multiple applications (gt4 upcoming etc)... it seems intuitive to me that the RS will have a slightly higher redline to keep it special and differentiated from the gt3, and come in at something like a 525hp screamer.
but who knows.. winter is coming.
but who knows.. winter is coming.
Agree this engine has a lot more power in it. 525HP is likely for RS, maybe a slightly higher redline for differentiation, but I doubt it.
Enginegate is still fresh on the Porsche mind, plus they know that the RS just needs the extra 25Hp and the RS sticker and it will sell like hot cakes.
