Originally Posted by
HI_808
I've been using the SPX with a SP 17.5 Ultrasportsman. I've tried FDRs of up to 5.0 and I've found that it actually needs a FDR of about 4.1 on profile 7 or 8 to be quick. The SP 17.5 is much faster than before when it was on my old GTB geared at 3.7.
Hi guys first time today running a spx with a tekin 17.5 on a large layout and as crazy as this sounds i ran on profile 8 and 12deg on the motor and my fdr was 7.22 and it had lots of punch and top end was the same or better then any 1 else others where running about 3.55 frd so it shows that most are gearing to high.so dont be affraid to try something crazy
regards clinton