96redLT4

Obviously there are many special bits and lightweight pieces on this car, but how special is the engine?? Is it simply a turbo s motor with bigger turbos or are the internals beefed up, higher tech materials etc? Hard to tell from Porsche's official website. I was a little surprised that it is 'only' 3.8L and for a motorsports/race engine only revs to about 7K. Thoughts?

Jim

mchrono

you want an answer from the engineering department or the marketing department ?

fxz

Is a damn turbo s in a carbon suite

96redLT4

Well, that is what I am asking. It sure makes more sense business wise to use engines that are already sitting around than to have to develop a new motorsport engine like they had to for the GT3.

J

GrantG

delete

-eztrader-

is a good question -

Just about every turbo owner I have met over the last 10 years, has 'modded' the engine to a ridiculous amount of power. Is this engine really that much better? I don't have a good answer - curious as well.

Riz

It basically a turbo S engine turned up to 11. Same displacement with bigger turbos and water injection like BMW uses in the M4 GTS. I am sure there is more to it but this is my understanding. I wish they did make it higher revving to differentiate it from the turbo S motor. McLaren and Ferrari have much higher redlines but they are V8's with flat plane cranks. Maybe some other more knowledgeable person can elaborate.

GrantG

Nope, not water injection. Just water sprayers on the outside of the intercoolers, like Subaru and Mitsubishi used 15 years ago.

mooty

anything with RS attached to it is special, in reality or in dream, doesn't matter.
the mkt will always support it.
while special, my wallet can't carry the wt. so not for me

Bardman

What does it matter? The outputs are known and you can expect it to take the punishment. It's as special as you believe it to be.

TB993tt

The spec show a 9.0:1 compression ratio compared to the tttS 9.8:1 this indicates different pistons which are no doubt stronger, peak power is at 7000rpm which is higher up than ttS so likely different cams, rods are likely specific also.....

This seems to be a hotted up ttS motor, I don't think this is a bad thing the latest 580PS ttS motor has evolved from the original 997.2 turbo and is a nice motor, very free revving and screams well at the top end when in nutter mode. The RS must surely have more lag (the ttS has none) with its bigger turbos and lower CR but I'll bet they have really minimised it.

200-300kph is quoted at 13.8s which with a CdA of 0.749 illustrates a very healthy power curve.

fxz

Really??

dewilmoth

I laughed when I saw that's what they put on a $300k+ car. It was worthless on my Evo.

squid42

Chances that the turbos are different. They might not do the VTG nonsense. Accepting higher fuel usage also allows them to keep the turbos spooled up covering more periods.

Did they publish a torque curve already?

GrantG

Still using (larger) VTG turbos. Max torque is same as Turbo S, but power is 120hp more. Leads me to believe that they may not have bothered beefing up the torque capacity of the PDK from the Turbo S, since the motor could surely produce more peak torque if midrange boost not ECU limited...

Either the PDK was the bottleneck or they wanted to give a sportier feel with a strong surge to redline (although slower than allowing the engine to make more midrange torque than the Turbo S).