holley 4160 tuning?

[GLHS221]

ok I have a carter 750 carb on my 440 motor, runs perfect. well I just got a holley 4150 new that has provision for my lokar cables and stuff so I put that on there....car wont even start just spits and sputters. What do I adjust on it? THanks Matt

[KEVSWS6]

Try This

Setting idle: Setting the idle speed and mixture on a Holley is very straight forward. First you should set the idle speed, using the adjustment screw against the throttle lever. In our case, since we don't run a choke, we set the idle rpm slightly higher to compensate for cold starts. If you do run a choke be sure to also set the fast idle speed (when the choke is closed.) Idle mixture is set by the tiny adjustment screws in the side of the metering blocks. On Holley's, backing the screw out makes the mixture richer (more fuel passes through the orifice.) We find the best adjustment is no more than two full turns out off the seat. If you have to go more than two turns out to get the engine to idle, you probably have another problem, such as a vacuum leak, or perhaps not enough idle speed. In some cases, especially with big cams and low idle vacuum, you may find that you have to crank the idle speed way up, and the idle mixture screws don't seem to make a difference. The problem here is that as you increase idle speed, more of the transfer slot becomes exposed, and the carb begins to meter through the primary circuit, causing a excessively rich idle mixture. In this case it may be necessary to drill a tiny 1/8" hole in each the throttle plates to allow some air to pass through, enabling you to close the throttle plates. Most Holley books outline this procedure


http://66.96.130.106/archives/1999/1...y/index2.shtml

[KEVSWS6]

This page was also good.

http://www.redlineweber.com/html/Tec...as_tunning.htm