Tuning an Edelbrock 650AVS on a stock 340
Mean,
My GTO left the showroom floor with 26* initial timing. 6* init + 20* added from man vac adv. Small factory cam 197 @050 10.75:1 CR. So 25* does not surprise me. My engine has a smooth idle in gear, 800 rpm, & 48* at idle. Yes, 48*, not a misprint!
The best way to get the extra idle timing is with an ADJUSTABLE vac adv unit connected to man vacuum [ MVA ]. MVA is mentioned in the Edel owners book.
If you use 12* init, you can add 23-24* with MVA. You will likely need to make a stop for the VA actuator, but this is what hot rodding is all about....
Mean,
My GTO left the showroom floor with 26* initial timing. 6* init + 20* added from man vac adv. Small factory cam 197 @050 10.75:1 CR. So 25* does not surprise me. My engine has a smooth idle in gear, 800 rpm, & 48* at idle. Yes, 48*, not a misprint!
The best way to get the extra idle timing is with an ADJUSTABLE vac adv unit connected to man vacuum [ MVA ]. MVA is mentioned in the Edel owners book.
If you use 12* init, you can add 23-24* with MVA. You will likely need to make a stop for the VA actuator, but this is what hot rodding is all about....