Idle too high! help!

Here is my recommendation. First let me say that the leak down of a barrel valve is a reference to allow you to go back to the same place that was good for you. It also puts you in the ballpark. What you are really interested on is getting the idle mixture correct. You should adjust the BV to give you a good response off of idle. No hesitation which is too lean and no blubbering which is too rich. If you are not a two step car then the other and probably the most important thing to check is the EGTs at staging. That should be in the 600 to 625* area. Once that is all set correctly then you should measure the leak down percent and record it so you can always return to it. Once that is done and you have found the right spot for your motor you can also adjust that percentage to make changes and always know where you are. Just because my motor works best at 85% on my gauge doing it the way I do it may not be 85% on your motor with your gauge the way you do it.

 

Dave is 100% correct. EGTs depend on a lot of things including ignition timing and is not telling you the truth inside that combustion chamber. The best indicator we have as to what is going on is reading the spark plugs. What I like to do is to adjust the fuel system so I see 1000* at the end of a run then read the plugs and balance them so they all read the same then lean it out until you have the amount of burn you want on the plugs. You will be shocked how far off the EGTs are once you get it correct.

Read this
http://www.draglist.com/artman2/pub...cohol_Motor_Spark_Plug_Reading_101_1172.shtml