Club 80-90 Forums

I think now, even if i had the chance to change my final drive i wouldnt. Mine will work out pretty similar to yours
60mph = 3000rpm
70mph = 3500rpm
I dont think we need much more than that? I will have a cruising speed of 65mph, which i think is perfect.
I think if you go for

0.77 would give 72mph

what rpm would that be a 55-60mph? would you have to be changing down?

..lee.. wrote:tom what diff ratio and tyre size are you going to be running???

Cheers for the PM Lee.

4.57 diff with 225 70 16 tyres.

lloydy wrote:

0.77 would give 72mph

what rpm would that be a 55-60mph? would you have to be changing down?

60mph would be at 2500rpm.

tom i`m presuming you have the 0.85 4th in an akg box, if so why dont you just fit the 0.78 vw 4th. that would be a very cheap upgrade and you`d go from 65 @ 3000 to 71 @ 3000.

..lee.. wrote:tom i`m presuming you have the 0.85 4th in an akg box, if so why dont you just fit the 0.78 vw 4th. that would be a very cheap upgrade and you`d go from 65 @ 3000 to 71 @ 3000.

I just trawled back through this thread and in the very informative post by Aidan that I had forgotten about he mentioned this too.

Looks like a good idea if a decent one can be found.

Thanks

Current gearing



With .77 fourth.



Doing this on my phone I hope it works!

your current gearing is longer than what mine will be after my longer 3rd and 4th

you got a link to the gear calc programme you used?

How would I find out my gear ratio's on 1-4th gears to fill out the chart for my van with a AHF with 5:43 fd? I want to double check my rev counter and make sure its set bob on.

jed

get the ratios from here. http://www.rjes.com/html/gearbox_types.html" onclick="window.open(this.href);return false;

lloydy wrote:get the ratios from here. http://www.rjes.com/html/gearbox_types.html" onclick="window.open(this.href);return false;

jed

actually cant see your box on there, b'yard http://www.brick-yard.co.uk/VehicleSpec ... fo/gbx.htm" onclick="window.open(this.href);return false;

lloydy wrote:actually cant see your box on there, b'yard http://www.brick-yard.co.uk/VehicleSpec ... fo/gbx.htm" onclick="window.open(this.href);return false;

Yeh it was on there.

G = 6.03
1 = 3.78
2 = 2.06
3 = 1.23
4 = 0.78

With my tyres on It comes out at,

3000rpm = 60.9mph
3500rpm = 71.0mph

jed

mine