901 gear ratios

[keith fellowes]

A mate has a 901 gearbox with gears ADIOT in it
We know it is not standard gearing but could it be a setup for rallying?

Anyone any ideas?

[MBEngineering]

HI
has the box a Std 7:31 CWP, if so

Approx ratio speed due to tyre size

Max speed to 7.000 RPM
1st A(Std) 38.4 MPH
2nd D 54.3 MPH
3rd I 76.6 MPH
4th O 97.6 MPH
5th T 118.8 MPH

that is with a MAX of 7.000 RPM, with the ratio change around the 5.000 rpm mark for 1st >2nd and 2nd >3rd, rest are above the 5.000 mark

regards mike

[keith fellowes]

Hello Mike

Don't know about the CWP but will pass on the information

Thank you very much

[MBEngineering]

Hi

forgot to ask;

what year is the box and is it a Ally case box or Mag

I take it you have it in bits to work out the ratios ?

regards mike

[keith fellowes]

The box came along with a lot of other parts as part payment for an Avenger rallycar!
The box is complete and I have no idea what type of case it is
It is for sale, if you're interested I can put you in touch

Keith

[perry911]

What is the gearbox numbers? There are two different stampings.
gearbox number
gearbox type.
These will tell all.