DIFF RATIO FOR BIKE ENGINED CAR

[MATHEW]

Hi All
Just wondering whats the best diff ratio to have for a BEC, my car has an english axle with a live rear axle, I am looking for top end around 130mph mark, the acceleration is fine as it is.
Any help would be appriciated.
MATHEW

[Tim.C]

You haven't given enough information. Can I suggest that you have a look at this and work it out yourself.

http://www.gamlin.org.uk/Downloads/bike_ratios.xls

Cheers.

TC

[LocoBlade]

As Tim says, use the spreadsheet to work it out properly with your engine etc, but unless you have comedy large wheels / tyres, almost without exception you'll need as high as an English axle will go, which means a 3.54 from an RS2000 and a couple of other models.

Edited by LocoBlade on Sunday 8th June 21:59

[Furyblade_Lee]

Yep, 3.54. From memory my furyblade had a 3.54 and 205/60/13 Yokos. I think it was geared to pull 132 mph at max revs in 6th. It certainly ran into the limiter with ease.

[MATHEW]

thanks all the spreadsheet is fantastic.
MATHEW

[LaurenceFrost]

I run a 3.38 diff with a Megabusa engine and 205/60/R13 wheels.

That gives about 128mph.