what 5 gear are u thinking off? a 8p box gear? so ur saying u will get ur g over 150 mph?
150 is plenty for me in a polo lol
im thinking of getting my casing machined out and fitting bigger bearings to the diff.
I have had it to 150mph and it was pretty damn close to limiting and was almost at 7000rpm on 13" wheels, it does have a lot of blowby on no3 cylinder which could have been caused by the duff injector making it run lean and as such I was terrified having it in the red as long as I did as I have forged pistons which I didn't want to burn before I do the rebuild with new rods so I backed off. Thing is the two times I've took it this far it has gotten there with stupid ease and if a 6th gear was there, it would pull it. I used
http://www.endtuning.com/gearratios.html to work out the road speed if using the ratios on the earlier posted chart, obviously speedo error will need to be taken into account. Not using the 8p gearbox no, using the ATV with the the 5th gear from an 8p, if you use the chart to fill out the gear ratio conversion you will get a road speed figure.. Don't know where to stop! Bigger bearings, metal casings, shot peened gears, ££££'s, I think I may just stick the diff and the 8p 5th into the ATV and hope for the best from the rest of my gubbins.