(20-02-2022, 09:54 PM)dickie65 Wrote: That odd my EB65 will do 45 mph in third gear and 65mph + in fourth ( best recorded against GPS is 72 MPH )
That's because your engine will rev happily! The poor old standard Ruby in 1978 couldn't, hence ran out of puff at 45MPH.
Nick, if your engine has been gasflowed a little and is able to pull more RPM than a standard 7 then a lower axle ratio is the way to go. I'm running a 5.375 Regent CWP in my Chummy with a mildly tuned engine and the performance is very good. Acceleration is great and top speed is about 60 but best not to hold it for too long without ear defenders!