I've done two EzEfi installs, one standard throttle body, and one 8 injector retrofit system, we already had the intake and throttle body.
Things I've learned are:
If you are not using the supplied throttle body unit, make sure you are inputting the correct info on injector size and flow.
The EFI power leads MUST connect to the battery terminal. I tried running off the radiator support power terminal near the battery because that's how far the wires reached. The Throttle position sensor readings & idle speed readings fluctuated, & idle was poor, - after going direct, they stabilized.
An HEI distributor will KILL the little tach conditioner box. Mine died in a few hours. I've heard of them dying while cranking on initial startup. The best solution was to install an MSD HEI module which has a clean tach output wire. Regular HEI modules have such a dirty tach output they can damage electronics. Keep in mind your module may be a Chinese made knock off part which may have NO tach filtering at all.
Keep the tach and TPS signal wires away from spark plug wires. The tach signal and Throttle position sensor signal are critical and need to be as clean as possible.
For most of my life I've maintained farm equipment, much of which had bronze filters. They filter too well, the super fine dust particles they stop can be so small they can't be seen. I've had plugged bronze filters that looked clean but you couldn't blow through them. Stay away from them for carb or EFI use, they plug easily.
The external pump may work but it's marginal for performance use when the fuel level goes down to half tank, - unless the tank has special baffles. If the pump takes in small bubbles, the pump performance will drop off and the engine will sputter. Modern cars have the pump in a fuel bucket to protect it from sloshed fuel bubbles.
Properly setting fuel pressure is easy to do wrong, read the instructions carefully, then read 'em again.
Setting the base idle screw is important, I had better results setting IAC "counts" to 20.
Throttle response can sometimes be improved by changing "enrichment" settings. Read the instructions carefully.
Quote:
I've had more 'issues' tuning the simple little '32 with the stick because the SOB is so touchy. It's so light - the motor is 450hp -- and with the 8 stacks the throttle is INSTANT... which makes smooth take offs a bit of a trick... but that's not the fault of the EFI -- that's the fault of the 8 stacks instant response. That's why racers installed them in the first place! Instant throttle response! LOL
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Greg, look at your throttle linkage ratios. A lot can be done to slow down the initial throttle opening ratio. All the early LS engines use a ramp system that has a slower initial opening for those huge single butterflies.