I have been plagued with this problem for a while (idle surge, hunt, etc.) sometimes I can get rid of it, and other times it's right there. I thought I had a handle on it, but it showed up in round three of eliminations (hard surge) making staging difficult and breaking my drivers concentration. If I raise the idle speed to about 2000-2200 I can keep it gone but the driver doesn't like how hard he has to hold the brake against it. If I go way rich (90+% bv leak) sometimes that will fix it but it can make it stumble after extended idle time. Would really prefer to idle at 1500 or so. Specs are: 545 BBC 1471 conventional (BDS Airlock) 20% over (18 lbs boost) .812 lift cam with 114 LSA 12.5:1 CR Brodix 2x heads Glide 6200 stall 10" FTI Talked to one of the Top Alky crew cheif's this last weekend and he gave some pointers, but I am taking any advice I can get. Other people seem to get rid of it. Thank you.