Update on new rs evo sleeve in red head rs. Like I said before its a torque monster. Every prop I tried it would pull. cmb nitro pipe at 9.5 inches or ops 67 pipe stinger at 360.
Ran 45rs red head with evo 45 piston and sleeve last night. its a torque monster. stock exhaust 184 boost and transfer 176. Will try a few different pipes and prop over the next couple days. The 45 evo sleeve is NOT a direct drop in sleeve. Reminds me of the old Pico blue head,
Marty over the past I have seen a lot of variation on the .67 cmb green head, stock piston and sleeve from 180,184,186,190 exhaust and 124,128,130 on transfer and boost. These measurements are taken with a digital depth gauge and are very accurate.