I am having an issue with my 1000 HP, around 1700rpm I get a slight hesitation, generally happens around corners and the higher gear the worse it is.
I have tried bigger squirter and different pump cams, the larger the worse it gets, I think it could be to do with the transfer slot on the secondarys, however when I set my secondary slot to 20 thou the car idles around 1100rpm with the primary wound right off.
with the picture below what is the small whole no1. above the transfer slot? when I set the secondaries totally closed I get the stumble. Picture isnt the best put I think you can see what I mean.
Would I be better increasing the idle mixture screws or playing with the secondary transfer slot, I get about 5" of vacuum in gear at idle.
Holley is set up with the following
PV 3.5 primary Secondary blocked
Green primary pump cam
35 front squirter/37 rear
Engine is a 540
Turbo 400 with 2000 stall
The engine drops from 1000rpm to around 650rpm when in gear at idle. I think this is to do with the tight converter 3.73 rear gears.
Any help/suggestions would be greatly appreciated. at WOT the car runs awesome