rgs944

Does the factory TurboS use the same gear box and clutch as the 968NA?

RajDatta

Nope, completely different unit with different gears, out put shafts. As far as the clutch, it is more like a 951 setup but with a higher clamping pressure plate and stronger disk.

rgs944

Did any of the factory Turbos ever make it to the US. and does anyone have them documented where the cars are now?

RajDatta

There are 2 turbo RS's and a turbo S in US that I am aware of.

rgs944

What is the difference between a RS and S?

odurandina

the RS has shorter gears. shorter than a stock '68.


the Turbo S, (Raj will probably correct me) has differnent gears AND final drive than the stock box. for example, i believe 6th gear is like a 0.773 instead of the .778. and the differential is also a tad longer. the result being about 175 mph at 6,000 rpm and redline upwards of 185 +.


i purchased two very hard to source, Audi S4 2.7 twin-turbo 01E 300 045G - 5th and 6th gearsets... w/ 5th perfect, 0.806, and 6th: 0.684 gears.... recently...


and what made it really special was that i paid only 400 dollars for the 2 gearsets ! (good things come w/ over a year waiting). now they're about
$ 2,500.00 from the dealer.

Thom

RS Gearing = NA gearing.

S gearing = NA gears 1, 2, 3, 4 + taller 5, 6 + taller R&P.

Damian in NJ

RS is a race car, not for the street. S is street legal.

odurandina

checking my notes;


968 stock gear ratios:

1: 3.182
2: 2.000
3: 1.435
4: 1.111
5: 0.912
6: 0.778

diff: 3.778


968 Turbo S gear ratios:

1: 3.182
2: 2.000
3: 1.435
4: 1.111
5: 0.882
6: 0.711

diff: 3.400

nick_968

There are 2 gearsets for the RS, one has the same as the NA 968, the other has the same 1-4 but with a shorter 5th and 6th, both have the same final drive as the NA. The 968 turbo S has the same 1 - 4 with a longer 5th and 6th plus a longer final drive.

GeorgeNZ

are you sure the audi gear sets are interchangeable with the porsche ones? A bunch of stuff like syncro rings, syncro hubs etc are but understood the gears were different. I have the Albins close ration 2-6th gearsets as the replacement factory parts are nla

Fox944

As mentioned above, there are at least 3 factory Turbo cars in the states. There are few people who document the Turbo cars (including myself). I plan to build the most comprehensive webpage for these special cars but am not ready to do so yet, as my research is still ongoing and has been for the last 5 years.

I'll tell you one thing, there are more factory Turbo cars out there then what most sources will tell you.

Lord_Galva

You sure the "S" is street legal?
Correct me if I'm wrong but........
I know in California you can get a "show and tell" permission slip for up to 1,500miles a year. This is the only way to drive the non-NHTS cars in California ie: 959, Bugatti EB110, Audi RS2, etc.

I would call that kinda street legal.

odurandina

the taller Audi gears have been installed in several 968 boxes. some minor "notching" is required for top gear... Roger at California Motorsports (has done several swaps) and was the person who pointed out that it would be far better to do 5th gear as well, and that the proper gears are available... since the reason you'd be going to a taller 6th gear is because you have the horsepower in the first place. once that happens your stock 5th gear is now too close to 4th gear (too low to really be a useful gear).


by adding that taller 5th, you're now driving a box that's almost identical to the 968 Turbo S box.


there is also a 200 mph, Audi S4, .600 gearset that will fit.


as i mentioned above in my edited post, i waited two years for a damaged Audi S4 box to become available (for less $$$) that had the gears i wanted....


swapped into the 968 box, the car will reach the redline in 5th gear just north of 150 mph, roughly the same as the Turbo S box, and the redline in top gear will be about 183 mph, a few mph short of the Turbo S box.


the guy selling me the gears has now rebuilt the box with shorter track gears for a client. win.



/

FRporscheman

You just mentioned way too many cool cars in one post. I need to go take a cold shower now.

I'm sure by "street legal" Damian meant that the turbo S was intended to be a street-able car, while the RS was intended to purely be raced. Besides, they're perfectly street legal in their native market which was Europe (or was it solely Germany?).