Regarding 2.5 internal ratio - what does it do
Originally posted by Lonestar
er... I'd say nothing, besides being able to use TC3 gear charts... Gear ratio is gear ratio... whether the change is in the primary or secondary transmission won't change much!!! Just drop a tooth! am I missing something critical here?
Hahaha, how right you are ;o)
To get this into perspective, dropping the pinion by 1 or 2 teeth on a standard 2.353 will have exactly the same effect on overall gearing as going to all the trouble and converting to a 2.5 internal ratio would. It does seem a little pointless.
Perhaps if you race low wind mod classes on very tight circuits where you need to run 1:8 - 1:9 overall ratios and you don't own any pinions smaller than 21teeth, perhaps then it might seem like a good idea. But then you could just buy some smaller pinions instead
One other point - the geezer going on about better torque and lower motor temps seemed pretty keen to sell 2.5 conversions
Nuff said.