Hot Rod Forum banner

pontiac 400

  1. Pontiac 400 camshaft suggestions

    Hello! I'm looking for camshaft suggestions. What im about to build is a Pontiac 400 with a .040 overbore, +17cc dish pistons, ported #13 heads (72cc), Edelbrock Performer RPM intake, holley 750cfm with vacuum secondaries. If my calculations are right that should give me about 9.30:1...
  2. TOO High idle on 72 pontiac 400 w Qjet

    Hotrodding Basics
    I have a 1972 pontiac grand prix with a 400 ci engine & rochester Q jet. I am experiencing very high idle at 1500 and can't get it to come down any lower. I have checked all vacuum lines and the carborator base gasket. I did a check with liquid at intake mani bolts without finding any leaks...