Currently my INDY Maxx has a Crower 4.15 crank with 6.570 BME rods and Wiseco pistons (this was an INDY combo at one time). Bob weight was 2144 gms.

I'm switching to a 4.15 K1 crank with K1 6.535 rods and an off the shelf ROSS piston. I had Brian at IMM(OU812) cam grind the counterweights for piston clearance. The bob weight with this combo comes in at 2163 gms, slightly more the BME AL rod combo.


68 RR 528" INDY MAXX 07 2500 CTD Southwest International Raceway - IHRA - Tucson, AZ