porsche964rs

992 GT3 was cw 42/2020
992 GT3 Cup was cw 50/2020
982 GT4 RS was cw 30/2021
992 GT3 RS was 09/2022

I know for a fact that the first one is posponed to 2021 so I don't think the others are still valid. But that's just guessing....

porsche964rs

The GT4RS and the 992 GT3/RS/Cup share the same Ti rod (it's the rod from the 991.2 GT3).

I highly doubt that the 4.0l non GT engines share the same crankshaft and piston.
Acc. to the spare part catalog the GT4 4.0 has a 22mm small end diameter bushing (GT3 has 23mm) and the crankshafts has a different PN.

GT4 = 9A1 102 077 20
GT3 = 9A1 102 081 92


So I don't think the rod will fit.....

And I don't want to fight with anybody. We just wait and see who is right

Mech33

Curious, how do you know what rod the GT4RS will use? If you have access to that part, how about other GT4RS engine parts to further confirm? Thanks!

ferrarifundo

Even I heard from a close friend who has connections with Porsche Motorsport that .. it will be a gt3 engine with pdk-s transmission delivering about 490 hp ... fingers crossed

dmk2

What is the logic behind this?

Westcoast

Really, then that will be an expensive car...

ferrarifundo

RS has to have some connection with Motorsport engine and porsche will ensure to get returns on investment made on the gt3 engine

ferrarifundo

I think GT4 RS base price would be in 140s.....992 GT3 base in 180s....992 RS base in 230s.
Again I could be wrong

Dr.Bill

I thought it was already confirmed that the GT3 engine would not fit in a Cayman?

TDT

It doesn't fit directly... but it can be made to fit, with a fair amount of engineering.
Ehresmann in Germany have fitted a GT3 991.2 engine into an 981 Clubsport... obviously no restriction on user comfort or NVH or practicality... but they did it.
If Porsche can do it if they want to.

What they can do is apply some of those halo components in the existing 718 4.0 and then call it GT3 like... especially if the case ends up being shared with the 992 GT3.

As for RS links to motorsport... I think the 718 CS has another 18month or so to run in its current form with the 3.8 X51... so maybe we see a change in the next GT4 CS (called 982), and this will create the link.
This is based upon Porsche Motorsport commitment to customers that the 718 CS would have a life of minimum 3 years i think.

GrantG

The 991.2 GT3 was $144k - I was thinking 992 GT3 would start in 160’s at most. Starting in 180’s would be a huge jump...

Also, the 991.2 GT3 is already detuned to 500hp from 520 (RS power), so why bother to retune it to 490hp now that 991 GT3 and RS are out of production. Seems surprising that this motor would be used in GT4, but not impossible I guess- but why did they bother to develop the new 4.0L with an obvious upgrade path if they could just stick in the existing 4.0?

blackholescion

Yeah no way it’s 180. That would be a 25% jump. Even the 718 GT4 Was 15%. All others were circa 8-10 so low 160s would be reasonable but given COVID, I could see them go lower. 155-159 to fit below 160. There’s a reason Porsche released the 718 GT4 at 99,200 and not 100k. It’s psychological.

And agreed on the other points. Several members with good cleaning ladies have said circa 475. That is 60 HP more than the GT4. Since the GT4 pulls through red line (BGB dyno showed max power at 7930 RPM) it would be reasonable to conclude some more exotic internals (crank, pistons) plus 3-500 extra red line would make the 475 level from the 4.0.

IMO, it would be foolish for Porsche to develop a new motor that fits emissions regs (4.0 in GT4) just to try to retrofit the old GT3 motor. Remember, that motor doesn’t adhere to emissions regulations. They would have to update it, retune, add OPF, etc. that is a huge cost over stick some different internals in an existing motor that is ready to go. This also is not including r&d on fitting it in the first place.

Westcoast

To me this makes more sense, the mid-engine 4.0l with a little more magic applied by the GT department...

JPMD

This is what I think also.

tthellott T

what is the possibility that 992 GT3 would be based on this new 9A2EVO 4.0 block with dry sump, motorsport internals & cylinder head, instead of 991.2 GT3 4.0?