holley projection throttle body

[bonnieclyde100]

i was wondering if you can get a gm obd1 ecu to run a holley projection 4di throttle body so you can have 4 barrels instead of 2? i have a 1969 chevy truck that i would like to install efi onto and be able to burn a new program to.

[1project2many]

This can be, and has been, done. The ecm's are designed to provide enough current to run two TBI injectors so they need modification in order to run four. It's not difficult if you have soldering skills and access to parts although plenty of people get scared at the thought of working inside the ecm case. Here's an idea of what's involved in the hardware upgrade: http://home.comcast.net/~p-928/749mods.html

If that isn't to you're liking, check out Dynamic EFI (site sponsor). He does quite a bit to OE GM ECM's to make them very user friendly and he can set up an ecm to work with the Holley throttle body.

[bonnieclyde100]

my ecu is number 16168625 and i have a second one with number 16186695 would it be the same for these as 1227749?

[1project2many]

There are similarities but they're definitely not an exact match.

[bonnieclyde100]

thanks for the info i will have to check that out

[Six_Shooter]

A friend of mine has done no ECM modifications and runs 4 TBI injectors off the PCM. He is running pairs of injectors in series, off a `7060 PCM.