I have read that some x12 17.5 stock spec users are running the 3dot -5 and the 4dot -10 inserts on their motors. does this allow you to use the higher profiles on the spx 7 &8 ? what does it do for this particular motor as most other motors are using positive + timing. what changes do you have to make to gearing by doing this? how does it effect the motor as a whole?
my current setup is x12 17.5 stock timing, spx profile 6 and geared at 5.8 fdr.
I am really trying to make this motor work