I have searched Rennlist, iahve googled the Internet and I can't find much information about the 993 Cup Car. Therefore I have to post a new topic, hopefully...
Does anyone have information about this car, in particular about the following;
How many were made?
What years?
How much did they weigh? 1140 kg?
What engine mods? power torque etc.
What suspension mods?
What years were they raced?
What specification of the car?
Pictures of the cars?

Please advice

//Jonas

A good start is JC in NY's site www.cupcar.net

Good luck!

There were approx. 450 made from 94-97.

2470lbs

3.8L 11.5:1 compression, 964 case, nonvarioram intake, twin plug, cup cams, solid rsr style rockers, connecting rods were stock but lighter than the turbo rods(they don't make these anymore-but the turbo rods aren't much heavier), stock cataylst, headers are the same as the 964 (just remove the heat exchanger's), solid motor mounts.

The early engines made 310hp and 370 Nm torque
All engines made '96 and after made 315hp
- increased the rev limit from 6700 to 6900rpm
- changed the valve gear

Suspension- mostly identical to stock
-solid subframe mounts
-machined subframe eccentrics to allow more camber
-non-adjustable bilstein coilovers
-different uprights in the front (1996)
-24 mm front sway bar-five adjustments
-18mm rear bar- three adj.

Transmission-
straight cut gears-but I can't remeber the ratios off the top of my head
steel synchos
4puck clutch
40%/65% limited slip
9:31 R/P
lower 6th gear and solid tranny bushings in 1996

there are more differences but it would take me all day to remember them all
Most of the other stuff I'm sure you know about-airjacks, matter roll cage, centerlock wheels etc.


And here's a pic-

Phil:

Car looks great. I took my cup to Roebling after you gave me the alignment settings. Car felt very comfortable. Thanks for the help.

I am racing in a couple of weeks at Sebring for the first time in this car. Ihope to see you at the Roebling Club race.

Great information. Really like the 993 Cup, but I'm wondering how hard it is to souce parts for these cars. Does Porsche still make replacement parts ... like steel synchros, for example ... or do you just rely on aftermarket sources? Is it reasonably easy to keep one of these beauties "track ready" or is finding parts a hassle?

Dave Morris
'97 993 coupe
'84 911 coupe

Jim- glad to hear the alignment settings worked for you, good luck at sebring and we will be at roebling.

Dave- These cars are not nearly as complicated as the 996 cups, nor do they differ from their street counterparts as much as the 996 cups. If you are resourceful and have a friendly relationship with your local dealers parts dept, its not a problem. Case in point, when I broke a subframe and its mounts(wreck), I took a good mount to a machine shop and had it copied, then bought a stock 993 subframe from a recycler and ground out the camber and toe eccentrics- I could have easily bought them from Porsche M.S. but I made pieces identical to the factory race part for 1/5 the cost.

Porsche still makes all the parts, and things like steel synchros are nothing special, most racecars out there have them.

Like any other car, preventive maintenance is key to keeping it on the track

Great site,Thanks.

Both 964 and 993 Cups are rare, only a few hundred made of each and as stated above and some percentage have been converted, totalled, etc. Finding an original one can be challenging but they are out there and they do change hands from time to time. Try posting a wanted on the cupcar.net site. 993 Cups are the prettiest of all of the Cup cars in my opinion. Oh, and as far as "published" 315 horsepower - more like closer to 340 in proper tune.

Slight correction to Phil: I don't think the trannys have straight cut gears and the 964 Cup uses stock heat exchangers.

JC i could be wrong on the gears but thats what i've always heard. It makes a hell of a lot of racket when you're sitting in the car with the tranny out of gear. And it has that distinct whine on acceleration.

As for the headers I was just pointing out that they are the same as the 964 street headers without the heat exchangers (I spent several hours with a torch, sawzall, and BFH removing a set of heat exchangers).

"Oh, and as far as "published" 315 horsepower - more like closer to 340 in proper tune."
Man I'd love to get 25 more horses, can you elaborate?

The racket at ideal is due to the lightweight flywheel. The gears are not straight cut either, unless yours have been changed out.

I believe that the 993Cup cars used the G50/32 trans. The main differences from the normal G50/21 used on other euro models

• second gear is separate from the main shaft,allowing easier gear changes
• steel syncros 1 - 6
• shorter shift linkage
• hard rubber in the mounts
• 40/65 lsd
• single mass flywheel, normal clutch w/ spring torsional vibration dampers

G50/32 ratios

1. 3.154
2. 2.000
3. 1.522
4. 1.241
5. 1.031
6. 0.829

The g50/31,32,33 were RS trannies.

This is from the 993 cup tech. manual, but i'm not sure which year it was issued.
G50/30
1st 13/41
2nd 21/42
3rd 25/38
4th 33/40
5th 38/37 41/42 optional
6th 35/31

I wish we had shorter gears, but we're running the same gears that were installed when the car went back to the factory in 97 for the cup series.

Interesting
G50/30 9:31 3.444 Cup trans
1st 13/41 > 3.154
2nd 21/42 > 2.00
3rd 25/38 > 1.52
4th 33/40 > 1.21
5th 38/37 > 0.974 41/42 optional > 1.02
6th 35/31 > .886

G50/31 9:31 3.444 RS basic
1st 13/41 > 3.154
2nd 20/40 > 2.000
3rd 23/35 > 1.522
4th 33/41 > 1.242
5th 41/42 > 1.024
6th 39/32 > 0.821

G50/32 9:31 3.444 RS Clubsport
1st 13/41 > 3.154
2nd 20/40 > 2.000
3rd 23/35 > 1.522
4th 29/36 > 1.241
5th 32/33 > 1.031
6th 35/29 > 0.829

G50/33 Swiss RS
1st 13/41 > 3.154
2nd 20/40 > 2.00
3rd 27/38 > 1.407
4th 34/41 > 1.118
5th 37/36 > 0.973
6th 39/32 > 0.821