Originally Posted by
Sweet2002
Austin, go back and read the post I had just before yours. Stacking a 65 SC pulley with a 178,181 or a 185 crank pullEY. Our IHI LYSHOLM superchargers were not designed to spin that high and be efficient and that des not take into account the heat that sort of stack creates!
After applying the the equation- Crank÷SC×6200, ive determine that maybe you should of only took your SC pulley machined down to 73mm. Yes i know only 1mm (.039) difference but that 1mm is 648 rpms different. 178÷70×6200=15,765 if you only took the SC down to 73, your numbers would be 178÷73×6200= 15,117. The 73mm may be the route i end up going. A 181÷74×6200 is just above that at 15,184. I wish we could get into more custom crank pulley sizes. That would make fine tuning much better.