Vacuum Gauge Tuning
So I fired my 383 (GM 962 cam, edelbrock heads) with the modified LT1 intake, made sure everything was OK, adjusted the timing (computer controlled), fuel map, readjusted the rockers, etc. I was slightly concerned that the modified LT1 intake wouldn't seal, so I have been checking and rechecking everything to make sure that I don't have a vacuum or coolant leak.
I ran it yesterday and hooked up a vacuum gauge, got a perfectly steady 14-15 inches (which is what it had when I ran a QJet) at a steady 700 RPM idle. I guess a steady idle and vacuum gauge reading verifies no vacuum leak and correctly adjusted rockers huh? I guess I should move onto something else and stop "over thinking" the engine tune?
Last edited by paulm; Feb 13th, 07 at 01:35 PM.