Holley Sniper vs. Edelbrock Pro-Flo 4

I went with the Edelbrock because i wanted spark control and EMI is an issue for a lot of people running stock ignition with the sniper tb or fitech setups.

@AndyF is spot on about the software, it's very basic and is really designed around users coming from carbs with no EFI experience. They offer a limited number of maps that use 42lb injectors, but the maps are tailored around a few basic variables (displacement, cam duration, fuel pressure, injector size). They don't adjust well if you attempt to play outside the guidelines.

For example:

I ordered a custom grind cam, I wanted as much idle vacuum as possible to give good map signal resolution. I also ordered 42lb injectors, Edelbrock offered a trade up for $100 on new, unused, 35lb units that came with the kit, figured I'd get it out of the way.

The maps for 42lb injectors are all set up for low idle vacuum, 12-5 in/hg. My cam grind gives me 16in, and the map wasn't able to adjust. It was super lean, didn't switch between the idle, cruise, accel sections properly and generally ran poor.

Dropping fuel pressure by 10psi to make the 42# act like 35# and running a map that expected 15" of idle vacuum cleared it right up.

Ill run it this way for now, and then use the current fuel system and intake/tb with a MS setup in the future.