Edelbrock sells a complete tuning kit for there carbs.
http://www.jegs.com/p/Edelbrock/Edelbrock-Carburetor-Calibration-Kits/743615/10002/-1
You most likely need lighter springs for the metering rods.

The kit comes w/different metering rods,jets etc,,it's a nice kit!

When the springs are too stiff (engine does not make enough vacuum),you can actually hear the metering pistons hit the top of the access plates,(if your engine is quiet enough.)

You can also cut off some of the springs(make them shorter),but dont get carried away w/the shortning of the springs.

Your meth injection,,,how is it controlled as far as ,,is it progressive,or does it just turn on & pump & spray the same @ all RPMs?

Is this a drag car the engine is in?
What trans,manual,automatic,,torque converter,rear axle ratio etc?


MBHD

12 port SDS EFI