ealoken

Hi, what are the Gearbox choices for the 944`s ?

I’m poking 450-500 whp in my new engine.
I have a S2 box with LSD and a 951 box in parts.


I have heard of the Corvette C5R Gearbox and the Audi 01e which is wery similar in size.

Butt, what about this?


Cayman 6 speed.

http://www.ebay.de/itm/80-Porsche-98....c100005.m1851

V2Rocket

legend has it that a guy in Italy got a Boxster/Cayman gear box fitted to his 944.
i suspect it is certainly possible but you'd be completely on your own for any required adapters.

FrenchToast

There is an 01E already developed for the car - from the 968. You do need 968 axles, and a new carrier I think, and possibly the 968 fuel tank.

The 968 01E is basically the FWD version of the Audi/VW 01E with some small differences.

The S2 box may work. Depending on the car's purpose it may not last very long though.

Never heard of the Corvette C5 or 986 setups. Anything can fit with some work.

bumflick

The 968 box has different gearing than the 951 box. Theoretical top speed in 6th is actually lower than 5th in the original box.

what is fun is a 968 box with audi gear set. Search the forum, you will find a couple writeups.

333pg333

Those Motor Werks guys who put in the Golf motors also convert to a Boxter transmission. I've asked a few times for some details but they're not forthcoming. Go onto FaceBook and look for;
Motor Werks Racing: Exclusively Porsche.

The 968 6 speed box will hold that sort of power but you will probably need to buy the upgraded axles/CVs that Lindsay Racing vend. I'd stick with your S2 box and see how it goes. You own it already so may as well use it. In the background, buy a 5 speed turbo box and while you're trying the S2 gearing you can decide if you want to stick with the shorter ratios in the 5 speed turbo box via converting to the S2 r&p, or keep the stock r&p for longer gearing which may just suit your application. There are quite a few guys running the 5 speed box with the S2 r&p Down Under with success. Tends to wake the cars up a little...but be aware that it brings your top speed down a bit. 10-15%. Depends on how fast you want to go. Also, it does sort of feel like you need a 6 speed overdrive for cruising on the hwy. It all comes down to what you need for your application. Personally, I preferred the way the 5 speed shifted over the 6 speed which I have had for a few years now.

ealoken

Thanks. I have a friend that makes axles and uses 108mm cv joints for motorsports.

The S2 box is to low, topping 4th at 200 and 5th on 250ish.

Im planing on a roadtrip and nurbugring, i want to be able to do 300 on 6800..

But a lot of the audi boxes have ****y TDI ratios.

333pg333

Probably the cheapest fix would be to get a longer r&p then. Not cheap, but more affordable than custom fitting non Porsche gearboxes.

ealoken

Where do i buy that?
My 951 Box has a tooth problem, might be able to Nice the final ratio over to the s2 Box.

333pg333

There's a few threads about longer r&p's in this forum. You'll have to do a bit of research. They're quite a few thousand dollars to buy from memory. Having said that, the stock 5 speed will go close to what you're asking.

Humboldtgrin

You can use a taller 5th gear from a N/A car in the turbo trans and be able to hit just over 200MPH at redline. Which is too fast for these cars. And I would stick with the turbo final drive (differential) gear as it is much stronger than the S2. And it sounds like you want to get and AOR 5 speed trans from a turbo S but with the taller fifth gear installed.

333pg333

^^ The S2 r&p is virtually as strong as the turbo version and has been proven in quite a few conversions on higher output cars to work well. You're thinking of the S version perhaps.

Humboldtgrin

Yea maybe the S or NA. Whatever one that was in my AOR before I had it repaired with one from an 87 UY turbo trans. In my photos there is a pinioned gear that has a chunk taken out of it. And it's not a turbo unit.

ealoken

To fast?
I had 280 km/h in a Volvo 242, 275 in My R32 Gts.

With the new suspension, splitter And a spoiler it schould have it ferga to the ground, Even in 300 km/h

Humboldtgrin

Over 180MPH it's like hitting another brick wall due to wind resistance. Wind resistance is a bell curve on the graph and starts to take effect at 55MPH. At 90 the curve has taken a vertical turn, hence why speed limits were 55MPH for many years because it accually saves gas. And that's why top fuel drag racers need 8000HP to go a quarter mile in 4 seconds. If there were no wind resistance they would need maybe 400HP. On that note you may want to take your car to a wind tunnel past 180MPH or 290KPH. Your splitter and or spoiler may fly off at that speed and your car could just take flight looking like the GT1 when it did.

Voith

If 959 and F40 are slippery enough 944 is good for 200mph too.

There is even a golf 1 and 2 in germany (rabbit I think it was in us) that go past 200mph.