Quote Originally Posted by Fast355 View Post
I logged my 5.7 Vortec with a 215/220 cam in it today. 55 mph @ 1,500 rpm with 13% throttle and 45-50 kpa on flat land. 70 mph @ 2,175 and 22% throttle at 45-55 kpa. Cruise timing was 32-39* btdc. 32* @ 1500 rpm and 39* @ 2,150. It wants more but distributor limitations prevent it. 41+ gives misfiring. Stock 0411 van tune only allows 35*BTDC.
how is the rotor phased you can probably get more in it if you clocked it round so its firing closer to the correct cylinder post in the cap