Originally Posted by TraceRacing
Can you provide an example where a small pinion and large spur has the same FDR as a large pinion and smaller spur? This is impossible!
You don't have to flame me, and you can just hit the quote button instead of typing out my quote, then you would not mis-quote me.
Off hand I can't find it exactly but on the Yoke BD for example:
96 Spur 30 Pinion (64P) = 6.40 FDR
109 Spur 34 Pinion (64P) = 6.41 FDR
94 Spur 31 Pinion (64P) = 6.06 FDR
112 Spur 37 Spur (64P) = 6.05 FDR
Now are you saying that the 109 Spur will have a higher top end than the 96 Spur? That the top end will make a difference of greater than 1/100th?
I am not sure that a smaller or larger spur will accelerate faster, this has been argued about on this site many times. I am pretty sure that the top end is ultimately decided by the final drive ratio and roll out though.