NJ-GT

I'm looking for some input:

1.- Is gearing the same for the 2003, 2004 and 2005 996 GT3 Cup? if different , anyone has the gearset info?

This is what I have:

GT3 Cup 04
Ratio
1st: 3.15
2nd: 2.00
3rd: 1.56
4th: 1.31
5th: 1.09
6th: 0.91
Final: 4.00
Rev Limiter: 8200


2.- Engine power the same in these 3 years?

My street 2004 996 GT3 dyno'ed on the 366 whp range on a Dynojet (SAE corrected)

3.- Is the Hood steel, aluminum or carbon fiber?

4.- Are the front fenders steel, aluminum or carbon fiber?

5.- Do they have the front and rear bumper (the aluminum crash structures), and if the do, do they use the European street car version?

6.- What's the weight estimate on the air jack system?

7.- How much heavier is the fuel cell compared to the stock plastic fuel tank?

8.- Does they come with the 26 gallons fuel tank?

9.- Who sells the uprights and wings that were used in the Speed WC GT series when these cars ran there (on Toyo RA1), and the front splitters that were used in that series?

10.- Engine lifetime is 80 hours, what about the 6-speed manual tranny?

11.- Is the stock clutch a sachs, tilton or other?

12.- Did they come with catalytic converters? I know the headers were the same units as the 2004 street GT3

13.- Do they have an electric power steering pump in the front trunk? or do they use the belt driven power steering pump?

14.- Do they require a special fuel?

15.- Are the stock shocks adjustable in compression and rebound?

16.- Are the bushing (Lower Control Arm) rubber or monoball?

17.- What the Motec dash a factory option or aftermarket? any 101 links to the benefits of a Motec?

I'm considering one given their current prices. I won't be running GTC3, SCCA GT2 or any form of Club Racing where a bone stock 996 GT3 Cup is required. This would be more of a DE and fun track day car, with a few time trials and once in a while Club Race in whichever class it fits.

Thanks a lot for your input.

911SLOW

1.- Is gearing the same for the 2003, 2004 and 2005 996 GT3 Cup? if different , anyone has the gearset info?

This is what I have:

GT3 Cup 04
Ratio
1st: 3.15
2nd: 2.00
3rd: 1.56
4th: 1.31
5th: 1.09
6th: 0.91
Final: 4.00
Rev Limiter: 8200

Crown wheel & Pinion 8/32
1. Gear 13/41
2. Gear 20/40
3. Gear 25/39
4. Gear 26/34
5. Gear 32/35
6. Gear 34/31

Many more gears to choose from

2.- Engine power the same in these 3 years?

My street 2004 996 GT3 dyno'ed on the 366 whp range on a Dynojet (SAE corrected)

Yes

Maximum power 287 kW / 390 PS at 7200rpm
Maximum torque 390 Nm at 6500rpm

Maximum engine revs 8000 rpm

3.- Is the Hood steel, aluminum or carbon fiber?

Adjustable carbon fibre composite rear wing with raised wing profile
Doors with carbon fibre composite window frame
Motorsport version for front lid
Special GT3 Cup nose section with upper cooling air exit
Polycarbonate side windows and rear screen.

4.- Are the front fenders steel, aluminum or carbon fiber?

Stock 996 GT3

5.- Do they have the front and rear bumper (the aluminum crash structures), and if the do, do they use the European street car version?

No crash bumper

6.- What's the weight estimate on the air jack system?

It's integrated

7.- How much heavier is the fuel cell compared to the stock plastic fuel tank?


8.- Does they come with the 26 gallons fuel tank?

Homologated production car fuel cell 89 litres

9.- Who sells the uprights and wings that were used in the Speed WC GT series when these cars ran there (on Toyo RA1), and the front splitters that were used in that series?

The 04- 05 Grand Am spec wing 60" and uprights were made for Porsche by
Crawford Composites

704-483-8319 Direct
704-809-1258 Fax



10.- Engine lifetime is 80 hours, what about the 6-speed manual tranny?

For the ring and pinion replacement recommended after 8000 km

11.- Is the stock clutch a sachs, tilton or other?

12.- Did they come with catalytic converters? I know the headers were the same units as the 2004 street GT3

Yes

13.- Do they have an electric power steering pump in the front trunk?
or do they use the belt driven power steering pump?

Rack-and-pinion steering with servo assistance

14.- Do they require a special fuel?

No

15.- Are the stock shocks adjustable in compression and rebound?

Sachs dampers (bump and rebound adjustable)


16.- Are the bushing (Lower Control Arm) rubber or monoball?

No rubber

17.- What the Motec dash a factory option or aftermarket? any 101 links to the benefits of a Motec?

Motec CAN interface only for data

I'm considering one given their current prices. I won't be running GTC3, SCCA GT2 or any form of Club Racing where a bone stock 996 GT3 Cup is required. This would be more of a DE and fun track day car, with a few time trials and once in a while Club Race in whichever class it fits.

Thanks a lot for your input.

911SLOW

I'm moving it to the CUP section.

I am sure the guys there will add more information.

GL finding a clean 6 cup. It's worth it! although I hear it's becoming almost impossible.

NJ-GT

John, you Rock !!!

Thanks a lot.

I have to liquidate a mother load of unused spares in my garage before pulling the trigger, and that includes the useless Cayman.

Skypalace

Roof and fenders are steel. Front hood is aluminum.

If you're careful with the tranny, it should last as long as the engine. My gearbox was touched once in 7.5 years of racing, when the engine was done (at > 100 hours, with max 3% leakdown).

Re Motec, as a driver I find in invaluble to be able to compare all laps, have a full log of engine (esp. if you ever let someone else in the car, you have hard data if they've zinged the engine), etc. I also find it super useful to have laptimes in the car with me, during qualifying or a race I know exactly what's going on with my laptimes, and more accurate than crew with a stopwatch.

In my 996 Cup I ran an SDL (Sport Dash Logger), a slightly downstripped version of the ADL2 but a bunch cheaper, the main difference is the number of external pins (inputs/outputs), and it doesn't support multiple dash config modes (race, practice, warmup). I added the SLM (shift light module) which is fully programmable, not only did I have progressive shift lights, but also showed status lights (fuel reserve, Motec logging, Chasecam recording, pit lane speed limit) and programmable warning lights (I could flash red for oil pressure low, but solid red for high engine temp etc.).

Motec now has the CDL3 (club dash) that comes with the SLM, which looks interesting, and has built in GPS (no need for an external beacon), but I don't have direct experience. They also have a version of the CDL3 without the logging.

I find video to be super useful also, and synced video and data is the ultimate.

utkinpol

Hi,

if there are anybody here who does not race and runs his 996 cup in DE and time attack formats only and uses something different from racing slicks - what was your experience and what tires have you ended up with?

jrgordonsenior

#10- Most motors went well past 80 hours, some to 200 before rebuilds. Trannys about the same.
#12- Catalytics are integral with the muffler which is why they're so damn expensive. Appeasing the greenies in Europe.
#13- Electric power steering pump was a GA modification in 6-cups, OEM in 7-cups.
#14- They're set up for 98-100 unleaded.
#16- Rubber bushings top & bottom. Monoballs are in RSR's. Easy to pop out and replace.....

NJ-GT

Paul,

The Speed World Challenge ran Toyo RA1 as the spec tire from 2003 thought 2007, for 2008-2010 they switched to R888, and last year they switched to Pirelli slicks.

So, the 996 and 997 GT3 Cup already raced on Toyo RA1, which is a low grip DOT-R tire compared to Hoosier R6/A6, BFG R1, Z214, V710.

The spec size on RA1 was 245/40 and 305/35 x 18.

I had access for 2 years to JGR, John had 2 cars running with sponsorship from AXA Financials, Lawson Aschenbach and Ricardo Imery were the drivers.

The 996 GT3 Cup Speed GT spec ran a modified engine with another 100Hp (they were in the 470-485hp range), very short life engines. The 996 GT3 WC car had a lower deeper splitter and bigger wing with taller uprights. They were also plenty heavier than as stock 996 GT3 Cup, plus Speed-WC gave them extra weight for winning races, with the driver, weight was in the 2,850 lbs range. At Laguna Seca, the fastest ever 996 GT3 Cup WC specs on Toyo RA1 ran a 1:31.469 (Wolf Henzler).

There is no need to run slicks for DE (I think it is a waste of $$$), but the Cup (996 and 997) can run on any tire. This lowers their operating costs for DE and track days events.

For Time Attacks, Time Trials, etc, it is up to the rules to determine what tires to run and what class. Any car can be made competitive.

NJ-GT

Thanks John.

How do you compare your 996C2 Racer to your former 2003 GT3Cup, performance wise?

Red9

[QUOTE=Skypalace;9503041] Front hood is aluminum.


/QUOTE]

You sure a1bout that? On 996 Cup -- I have only seen steel-- maybe I am wrong?

lordpantsington

I love threads like this. Is that 470-485hp at the crank or wheel? Was that before restriction?

jrgordonsenior

Now that's a great question Rad and tough to answer since I'm almost as fast now. To start with the cup's transmission was so much better with closer gear ratios and a significantly lower R&P. Add to that another 90 or so WHP and you'd think it was no contest but that's not the case.

My little 3.4 putting out 270 WHP has been almost as fast at most of the tracks I've run on. I did 24.5 at WS recently, with my cup maybe .5 faster. At Cal Speedway I turned a 44.5, with the Cup 43.5. A couple of interesting facts, I weigh about 150lbs. less in the C2, and have a fresh Guard 50/80 diff. When I sold the cup we pulled the diff and it was competely worn out. I installed new Guards clutches and ran it once at Las Vegas Motorspeedway. I was 2 seconds faster then my previous best there. I really would have liked another shot at Wiillow Springs with the new diff but the car sold.

I'm sure my driving skills have improved over the years too, but my little C2 has proven itself to be the little race car that could....

NJ-GT

Crank. The 2 996 JGR cars that ran in 2004 were in the 430whp range. John was refreshing the engines twice per season. In 2005 he switched to the 997 car, and by the end of 2006 he sold the cars, closed JGR and moved from Pennsylvania to California. This was my favorite Porsche shop for a long time. I think one of the 2006 cars went to GMG Racing.

My bone stock 2004 996 GT3 street car was 366whp on a dynojet SAE corrected.

NJ-GT

This is great information. The fastest lap done on a GTC3 legal car was a 1:42 at AAA. 150 lbs lower weight should close the gap by 1.3 secs at AAA.

Your lap times are extremely shocking for a C2 with just 270whp (my Cayman has that kind of power). 1:44.5 at AAA and 1:24.5 at Big Willow, amazing.

mooty

jrg's car is super light. makes cup car look like sherman tank in wt.