puyi

Is the car in france based on a 89 club sport? or is it another?

Puyi

Cheburator

The car in France is red and was advertised on http://www.mobile.de for ages at EUR14,000. It was sold with an S2 engine. I cannot tell you for sure whether it was based on a CS because it already had a lot of modifications - wider rear flares (993 RS style), rear mounted transaxle cooler, modified front end for better aero and wider front end. You can see pictures of the car in the master weight saving thread.

I also remembered that there was another racer in the UK - it was a white CS, which was modified by the factory - it had transaxle cooler and Bilstein coilovers with 2.5" springs and helpers, the car also had the thicker ARBs front and rear. Sadly by the time we got our hands on it, the car was an insurance write-off due to a bad accident. It was parted out with bits and bobs going to various members on here - adrian se got the suspension, Martin D got the gearbox, Paul A got the shell etc.

puyi

Ok it is the one. Named "christine" by former owner. It is a friend of mine who bought it 2 years ago. She is in bad shape now and need to be rebuild almost completely. This car was one of cars developpement for 928 GT cup. And she is the first 928 club sport MY'89. (with ODB!)

Several years ago, I thought, another one 928, a '90 GT was a developpement car for the GT cup due to suspension specs and other hardware, but we didn't get to a conclusion about it.

For the white you mentionned, I think, you are talking about a White CS imported in england, LHD which has been destroyed in an accident. That car don't seem to have anything with a GT cup developpement car, If this is that one I Know/remember.

Puyi

Cheburator

I nearly bought the TTP car, which your friend now has, but was put off by the poor condition it was in and my own GT/S race car was into its late stage of development. Good luck with it and please keep us posted on the progress!

The white CS sport in the UK was very similar in spec to "Christine" engine, suspension and gearbox wise, thus I am 100% certain that it was a "werks" development car.

Never seen a 1990GT with "werks" stuff on it.

The most complete racecar Porsche ever developed would have been the Wehmeier & Castrup car from 1989. I am still trying to get in touch with Wehmeier & Castrup, who still operate as a Porsche/VW/Audi dealers in Bielefeld in Germany to see what happened to the car.

Do not forget the 1983 S2, which was raced very successfully in the VLN by Steckoning (3 Wins) and a Norschleife VLN lap record of 8:06 at the time. I wonder where this car is now...

Nicole

I have been in touch with the very nice owners of this unique 928 race car. They sent me a glossy magazine with many details about the car, and the story of how it got to be what it is.

Here is a summary:

92 928 GTS, Indischrot

Conversion started in 1998 by RDM Racing (www.rdm-racing.de), according to FIA-GT2 Standards for Group H.

Body:
- modified front and rear
- welded cage
- GT2 boomerang wing
- headlights removed for weight savings
- air lifts

Current Engine:
- GTS engine
- moved back by 14cm, and down by 11 cm
- light flywheel
- accusump
- nodified oil pan
- oil drillings modified in lower cradle
- front of engine only drives power steering pump and compressor (not clear what compressor that is - the engine is not supercharged - I'll clarify that)
- Alternator driven by rear axle
- RED battery in back
- Custom exhaust and headers
- Two cargraphic catalytic converters
- 390hp / 530Nm

Transmission:
- manual 968 turbo RS six speed transmission
- short shifter
- RDM single disc clutch
- locking differential

Brakes:
- 993 GT2 brakes, modified and adapted
- Bosch Motorsport ABS
- 380/320 mm discs

Suspension:
- modified Hubs
- enhanced Bilstein adjustable dampeners with Eibach springs
- front suspension with "Uniballs" (I have no idea what that is)
- Teflon bushings in the back
- Braces between front and rear strut towers

Wheels:
- 3-part BBS custom
- Aluminum rims and Magnesium "stars"
- 10.5J x 18 front and 12J x 18 Rear
- 11,000 DM - about $6500 - per set when new

Tires:
- Non-dumpster, either
-- Pirelli slicks
--- Front: 305/645 ZR 18 PS
--- Rear: 305/680 ZR 18 P3
-- Kumho ECSTA V70A
--- Front: 285/30 ZR 18 K90
--- Rear: 305/30 ZR 18 K60

Interior:

- Drivers seat Recaro "Pro-Racer" moved backwards
- Custom pedal unit
- Steering column extension and quick release
- Stack display with data recording and transmission
- Makrolon glass, except windshield

Weight: 1230kg

Tank: 120 Liter FT3 tank with quick tank and reserve

Top speed: 264 km/h

Acceleration: 0-100 km/h in approximately 4.4 sec

Racing season: Six races, plus test drives

Estimated value: Euro 52,000

The owners had the car since 2003, and would consider selling it.

brianrheffron

The term "Uniball" is sometimes used in the UK to describe a Rose joint , otherwise known as a sperical or rod end joint. Not sure what you call them in the US.

mark kibort

There really wouldnt be a need for a 6 speed transmission, especially in a stroker 928 engine, mainly because of the flat HP curve. Its one of the reasons that the Audi Diesel R10 has only a 5 speed. (very flat HP curve). no need for more gears, as a flat hp curve has a similar effect as a IVT would have. (but with small pauses for shifts) Plus, if there are gains to be had, the ratios would have to be close ratio. A corvette 6 speed is not a close ratio gear box. In fact, its gear ratios and closeness is very similar to the 928 2.2 gear box. (i.e shift points at 55mph, 80mph and 118mph). A true close ratio gear box, 6 speed or not, would have a gear in the 95-100mph range as well.

That 928 is pretty nice looking! From those pics, it looks like the gear box is a sequential shifter. wouldnt that be cool!!

IcemanG17

I wonder what the gear ratios are in that 6 speed..................

FlyingDog

compressor = air conditioning. I wonder why they didn't go with electric A/C.
Uniballs = monoballs = spherical bearings

Nicole

No, it's definitely not an AC compressor.

James Bailey

Given that they are runnings cats...the "compressor" is probably the air injection smog pump ! Heim Joints are uniballs / spherical bearings. And yes the real issue is what are the gear ratios more gears for a given speed range is ALWAYS better ....

Nicole

Here is what it said in German:

Außer Servopumpe, Servokompressor keine Nebenantriebe.

Servopumpe is usually power steering pump
Servobremse would be power brake

So, since it says "servo" it must be for something that needs power assist.

mark kibort

Did the 968's have a 6 speed transmission in race form that was a sequential gear box? If they did, i would imagine the ratios to be the normal spread.

mk

Lizard928

AFAIK the 928 turbo RS tranny was not sequential.
I would be keen in seeing the modificationg for moving the engine back and fitting that tranny in there.

FlyingDog

If it's FIA-GT2, it's a good chance that it's A/C. It has to meet the cockpit comfort regulations which are now quite strict.

The other possibility since you mentioned it could be like a ps pump is hydraulic assist brakes.