Thread: Vacuum Advance

Tweet

Originally posted by dennis kelley
Is your vac advance connected to timed vacuum port or constant manifold port? The reason I ask is because I have a mild cam in my 302 and it pulls crazy vacuum at Idle (15inch) and my initial timing is extemely low 4 degrees. I was thinking that if I switch to timed vacuum I can increase initial and have better response. Any opinions appreciated. If it wasn't so cold out I get the car out but no heater or top no test drive until warmer weather

i use manifold vac. most of the time so i can run lower base timing for hot starting purposes. then the vac, adv. will adv. the timing when you start the motor for good response. sometimes it can cause some heating problems in hot weather. try it both ways and see what way you like best.

ps- and dont believe nothing that Henry tells you