Me and my father-in-law are oval racing with these motors. Both are converted to slide carbs. 21 has 40mm 22 has 38mm. Both motors wont pull all the way to max rpm ,they seem to go lean on top no matter how fat the mains are. both are rebuilt (CORRECTLY), Running premium fuel 32/1 mix, timing seems ...

I was wondering horspower of both motors? I know porting is different, but is one better than the other? I'm thinking of free air with early liquifire recoil housing, dual carbs,and cdi ignition. Will it survive???? Is the cdi reliable enough, or should I stick with points? Beyond the pto seals spra...