Join Date: Nov 2000
Location: Tallahassee, FL 32312
Just installed my Holley 750 DP and now trying to set the 4 corner idle. Out of the box the primaries were set to 1.5 turns out and the secondaries were 1/2 turn out. I've tried diff combinations of setting the idle mixture screws but the best seems to be pretty close to the way it came out of the box (surprise!).
Here's the problem, I've got an LS6 with a TH400 and 2500 stall. I can't get it to stay alive with less than a neutral idle speed of well above 1500 or once I put it in gear it stalls. So I'm sure my idle circuit on the carb is not even being used. The car also likes to hunt when in gear and not moving. I've got 10" of vacuum in neutral, and an inital timing of around 14. I do have a pretty healthy cam, Edelbrock "Air Gap" manifold, 10.5:1 pistons and 2.5" headers so getting a lower idle speed might be a problem. My plugs look good, but I'm worried I may start to foul them if I'm never really idling (as far as my carb is concerned).