Six speed box and diff ratios

[Jay]

I'm looking to fit a six peeder to replace my 5 speeder and want to know are the final drive ratios the same in both, I thought about a TDi box to increase the to speed?? does anyone have the info or has anyone fitted the same?!

Cheers
Jay

[blu_s2]

Final ratios - Yes and no depending on what model/year

see Charlie Smith's site, far more info than anyone could ever desire imho

http://www.elektro.com/~audi/01E/

[Paulm]

I have both car at the monent and can say the Diesel is very much higher geared than my S2. I will be out in my diesel shortly and will post 6th gear results at diff revs

Paul

[Paulm]

not very scientific i know but here you go

RPM in 6th gear

1000 = 35mph

2000 = 70mph

3000 = 104mph

car is 5 cylinder 2.5 tdi

HTH

Paul

[Jay]

not very scientific i know but here you go

RPM in 6th gear

1000 = 35mph

2000 = 70mph

3000 = 104mph

car is 5 cylinder 2.5 tdi

HTH

Paul

Cheers, it's not a big increase, maybe allroad box I require?!

[Lee]

You want more than 210mph @ 6000rpm?? How much power do you have mate as those ratios are about as tall as you get I would have thought in a 4WD Audi?

[S2central.net]

That IS a big increase - the ABY 6 speeder (running same effective top and final ratio as 3B box) is circa 100mph at 4000rpm. Its geared for ~25mph per 1000 rpm on standard diameter wheels n tyres.

Looks like the TDi box is more like 34-35mph per 1000 rpm... Which of course it needs as an oil burner which can't rev as fast as a petrol engine.

Can't recall the formula for estimating BHP needs for ultimate top speed, but 210mph at 6000rpm smells to me like a mighty hairy S2 !!!

Paul

[Jay]

That IS a big increase - the ABY 6 speeder (running same effective top and final ratio as 3B box) is circa 100mph at 4000rpm. Its geared for ~25mph per 1000 rpm on standard diameter wheels n tyres.

Looks like the TDi box is more like 34-35mph per 1000 rpm... Which of course it needs as an oil burner which can't rev as fast as a petrol engine.

Can't recall the formula for estimating BHP needs for ultimate top speed, but 210mph at 6000rpm smells to me like a mighty hairy S2 !!!

Paul

I had heard that the lads state side with 500 BHP will pull 193 MHP! audis have good aero-dynamics, but each mph takes an ever increaseing amount of horse power. just wanted a tall top gear for cruising (fuel econ) and may be a blast to the far side of 170 MPH!!!