Ratios for track day

[SilverBullet]

I think getting to 180km/h would be quite fast, on stock 03 box now.
its a T4 2666, 332 sch cam.
A friend of mine in a 997 turbo reached 250km/h on the longest straight at Sepang race track before slowing for the corner.
I know I cant reach that but would try to get the most out of the gearbox.

[Oval]

yeah 250km/h in a Porsche is easy, we all do that, but what do you need your Bug to do? Sorry, not sure what Sepang track is: Hill climb? Quarter mile? Low-speed twisty corners?

[SilverBullet]

Sepang international race track, one of the F1 race track in Malaysia. Nothing here in Singapore, so most car enthusiast drive up.

[70Turbobug]

Originally Posted by SilverBullet

I think getting to 180km/h would be quite fast, on stock 03 box now.
its a T4 2666, 332 sch cam.
A friend of mine in a 997 turbo reached 250km/h on the longest straight at Sepang race track before slowing for the corner.
I know I cant reach that but would try to get the most out of the gearbox.

That engine lives from torque,you wouldn´t be happy with a short ratio box imho.Much different than most type 1s.Sepang is a very fast track,you will lose time with a short box.
If a 5 speed is what you want I would go with a 915/03 box ratios:
1.) 3,181
2.) 1,833
3.) 1,261
4.) 0,961
5.) 0,758
R+P: 4,42

You could go with a 245/30 18 tire and be plenty fast enough to leave the Porsches behind you.

As a 4 speed a stock ratio trans with 3.44 R+P works really well on the track.The Rancho pro street 3.88 and 0.89 4th works really well also.

[SilverBullet]

Thanks for the input 70Turbobug, yes Sepang is a fast track, would be nice to leave them behind .
Today is the F1 practice session in Singapore, the night race! Sunday race day.

[Oval]

70Turbobug, that mention of a 3.44 R&P is interesting (and sensible),that would be strong but would require big power to work