cslag
08-30-2010, 08:04 PM
Drag racing a Malossi Big Bore, 47mm crank, 30mm carb, Hagerty intake, PVL, Hetrick pipe, and over range kit. Just had a port job done by a reputable business and we are still running the exact same track times as we were before port work was done. Only change made was replacing the 44mm with the 47mm crank. Rpm max is about 12,400. Shouldn't I have noticed a good bit of difference. Any help would be appreciated. What should the timing and squish be on this set-up?