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Cayman GT4: Where are we up 2 now? Déjà vu Edition

I understand that there were two main considerations.

From the Clubsport business perspective, it provides an engine upgrade path to protect teams’ current investments,

and on on the road car,

the X51’s multivalve plenum (with normal 991 throttle body) enables finer tuning (all other aspects being equal) than the limited Gen1 intake.

 
It's all 2nd hand info, so still rumours imo.

Porsche bin a bespoke 4.0l Engine last minute which has been in testing 2 years !!! that's even if there was ever one in the 1st place as that was just rumour anyway.

 
John Tecce posted this about installing a GT3 engine in a Cayman..



"As for the whole 'why aren't we getting a 4.0L GT3 motor' question, you have to noodle over the following:

[ol][*]You can't slam a GT3 motor in a 981 because of several fitment reasons, the biggest being the oil sump tank. (requires re-engineering of the motor and/or unibody for a car that is really a 2nd generation of a previous model)[*]The Siemens SDI 9.1 used to run all 991s/981s will not spin over 8160. The ECU architecture doesn't allow it. (requires re-engineering of the ECU platform)[*]Look at the outright engine costs - a 991.1 GT3 motor is $75K to buy new; a 4.0L 991.1 911R motor is $98K and a GT4 motor is $45K. (the car’s price point would land at GT3 levels, which is not wanted by people on either side of the table.)[/ol]I don’t doubt that a 4.0L GT3 motor found its way into a 981 in Weissach at one point or another and while there's no doubt that the resources are there to execute everything listed above in a nanosecond, sometimes it just doesn't make sense. Unfortunately you cant just Mr. Potato Head that motor in that car like you can with a lot of other things. It's for this very reason that we convert the existing motors to 4.0L from 3.8L in the exact same fashion that the factory did via a stroke conversion. I know of 1 person on here currently attempting to do this but if you look at the cost to do a project like this, it would be the world's most expensive Cayman on the road ever."



 
Thanks Ralph.

Yes, that scotches a 981 Clubsport being fitted with X51 since I believe that in addition to the plenum mod the head and cams, etc., plus the exhaust are also modified. However, a 718/982 Clubsport with a 3.8-litre and X51 could be homologated if this was to be the engine in the road car.

I think your post re installing a GT3 engine in the Cayman just reinforces what we've been saying on here for ages - i.e. it's a non-starter.

Jeff

 
Motorhead said:
Thanks Ralph.

Yes, that scotches a 981 Clubsport being fitted with X51 since I believe that in addition to the plenum mod the head and cams, etc., plus the exhaust are also modified. However, a 718/982 Clubsport with a 3.8-litre and X51 could be homologated if this was to be the engine in the road car.

I think your post re installing a GT3 engine in the Cayman just reinforces what we've been saying on here for ages - i.e. it's a non-starter.

Jeff
Click to expand...

Jeff,

I am not sure about the X51 upgrade and existing 981 Clubsports. Porsche might apply for a waiver, which if granted would allow Porsche customer teams to upgrade the 981 engine but not other parts. This could make sense in that it extends the life of teams' investment in the 981 platform, but means the 718/982 Clubsport has engine + chassis etc upgrade so Porsche can sell this more competitive model also. Precedent is the Clubsport MR upgrades.

Seems the logical business model to me...

 
Agreed Ralph,

This catch-all regulation could be applicable, making the 981 Clubsport more competitive in the short term until its replacement comes along:

"The make and type of engine used must remain original, unless by a waiver of the SRO GT4 Bureau."

Jeff

 
It does appear to have less duct tape on the splitter and rear PU and the side intakes look more angular. The driver's seat is a race seat and the top of the windscreen is covered so presumably a car for testing on track v road.

There do seem to be a number of sighting of different prototypes running around at the moment.

I guess we're waiting for a video of a 992 Carrera running through the Museum car park with a cheeky yellow GT4 parked up like last time.

 
Having spent 14 days touring Germany north to south and back again, I was keeping my eyes peeled for GT4 pre-production mules on the roads. Sadly I wasn't in luck. When on the factory tour and ushered along with the group around the extensive site, I was similarly alert to any sightings of a 992 or GT4. If the cars were there, which they most likely were, they were being kept well away from inquisitive eyes.

The launch is to be "very soon" was the only response I could get from my questions to the tour guide.

Brian

 
I suppose the LA Show next month would be an opportunity to release the road car but it would be upstaged by the 992 and I would have thought that Porsche would want to make more of an event of it. Geneva 2019 would seem to be a more likely opportunity?

Jeff

 
In 2015, OPCs were calling punters asking for deposits early February and the car was launched 30 days later at the Geneva Show. Maybe the same again? The one difference this time is that the Clubsport will be delivered to USA race teams late December. I wonder whether this will mean it will appear at Essen, at least settling the engine configuration question.

 
That's a possibility Ralph. Rather odd that the race car would be announced in advance of the road car but it could be the only way to satisfy US race team requirements.

Being a German-based show Essen's a possibility and might be more appropriate for a performance car like the GT4, although Geneva is a month earlier. We'll see.

Jeff

 
Ah! I'd forgotten that Essen stage that show - I was thinking of the Techno Classica - and as you point out there's a precedent should Porsche decide to showcase the GT4 Clubsport car there.

Jeff

 
Bilko1 said:
Just posted on YT ......

https://www.youtube.com/watch?v=kkIs6pcgVBo
Click to expand...

Same car as that pictured in Jeff's auto link to autogespot.de pictures since taken down. The car was fitted with race seat leading to the thought that it might have been going to a Nordschliefe timed run for which helmet, cage and race seat are required. One of the autogespot images showing the seat is below:

 
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