Originally Posted by roger999
nol i use 80 spur now, and 30 pinion. That track is very specific outdoor, with big corners, and is not great grip. 7.57 would be too strong. Why can't use 5.3? Motor temp is around 50-55 degree C.
By big corner you mean fast? regardless of grip you still need to have the good ratio to start and 5.33 doesn't sound right to me.
For grip you have to look at your chassis set up not your motor one.
A friend of mine is running your speedo with first HB 10.5t, he was running 87t and 29t (fdr 6) and this was not very good, our track is long and fast too.
He is running with a 10.5t LRP X12 now and we got him to reduce his pinion to 24t, his motor is getting a little bit too hot (fdr 6.96)
I think you should try a lower pinion, 25t to start, check your heat and see if you are faster, and eventually 22t pinion, do the same.
An other thing to consider is the set up of speedo, maybe it is not set correctly for your fdr.
I understand why your motor does not match properly with your spur, I have never tried this pinion/spur size personally.