1 Having trouble working out Gear ratio's Thu May 26, 2016 10:12 am
Gauntlett
Silver member
Need a bit of help here, having now fitted my knew electronic speedo with everything, it has confirmed what I've suspected for a long time, 8500rpm = 85mph, crap!!! Here are the details 8000rpm divide by 5th gear 1.666 =4819rpm on shaft divided by diff 3.2 (confirmed ratio) =1506rpm rear axle, tyres are 205/70 R14 = 2.02m circ. =3042m/min = 182.5kph = 113mph. The only thing I am going to confirm now is fifth gear ratio simply by rotating the engine 10 times in 5th and counting shaft revs. In the mean time has anybody heard of anything simiar i.e special gearboxes????