Regear my G50/03 gearbox

[quiquedb]

Yes, I need to regear my gearbox, I have more less the ratios for the 3rd, 4th and 5th gears, I don't want to change the two first.

I know than in USA you can buy a good gears to Guards Transmissions, but may be there are some one in Europe who make a good Porsche gears to my gearbox. Any suggestions???

Thanks

 

[PhilRS]

Would you know what ring and pinion you have on your car? I would change this first, to shorten the gear-ratios. Great on the 964 RS.

 

[quiquedb]

Phil... I have 9/31 (3.444) gear and pinion, but I don't want to change it cause the gap between gears are the same, I need shorter gaps...

I saw the following chart:

With 18" rim, 645mm diameter at 7200rpm

1st 12/42 to 72,67km/h
2nd 17/35 to 123,54km/h (gap 50,87km/h)
3rd 19/29 to 166,64km/h (gap 43,61km/h)
4th 22/27 to 207,25km/h (gap 40,61km/h)
5th 25/26 to 244,56km/h (gap 37,31km/h)

I think for a car with more 300hp and 1055 kgs that are a good gear chart...

Suggestions???

 

[chfs911]

Here are the Cup figures which I prefer to RS at Spa.

964 Cup 1990 transmission typ G50/10-4 has following gear rations:
1st 3,500 95030290113 cup racing part (no longer available)
2nd 2,059 95030291200 cup racing part (no longer available)
3rd 1,407 95030290336 standard part carrera 2
4st 1,086 95030290431 standard part carrera 2
5th 0,868 95030290540 standard part carrera 2

 

[carreraboy]

thought it was a G50/10 ?

 

[quiquedb]

Mine will be:

3,5 (stock gear)
2,059 (stock gear)
1,526
1,227
1,040

then I change 3rd, 4th & 5th for a top speed at 7200rpm than 244km/h

The stock 5th gear arrive up to 280km/h... this is too large to Spa or any circuit...

 

[h_____]

Sounds sensible for a track car. I never got to as much 220 on track, even at Spa I think , so judging from better acceleration and a bit more driver capability I agree 244 should give you ample room, so you arent left on the limiter anywhere.

This has to be the biggest bang for buck performance upgrade for a track car. We swap ratios on the other race car for every circuit we go to.

 

[quiquedb]

Thanks, but I need an adress or something similar to buy it in Europe, for me is better, VAT and no custom charges...

Any suggestions???

 

[hgo]

sorry to hack this tread
but also any ideas on where to buy the short ring-pinion stuff?

thanks
Hgo

 

[quiquedb]

Directly from porsche dealer???, you are asking about the 8/32??? You have lots of places to buy one...

 

[hgo]

yes the 8/32.
is it a straight swap in the gearbox?
any ideas about price?
and where to buy a quality set?
or best to buy Porsche sets?
or is it available second hand somewhere?

thanks
Hgo