The Stovebolt Site Forums Project Journals Completed Journals 1957 Chevy 3100 - Chop Top project "Death Trap"

I have finally finished the Sniper EFI conversion. The kit from Holley is complete with everything you will need to install the EFI and wire and program the system. I had to fight all of the s#@t work the had been done to the truck from PO's, you can tell that this truck has changed hand more than a few times, nothing seems to be consistent.

I had clearance problems from the start, the fuel lines had to routed around the corvette rear, the exhaust and transmission. Running the feed and return line up the back of the firewall was a bear, it was tight and the firewall had been hacked up previously. The throttle body simply bolts in place as would a 4 barrel, is is prewired with a TPS, IAC, MAS and temp sensor. Adding the O2 sensor to the exhaust was painless as Holley supplies a threaded plate, gasket and band clamps. I had to resort to using hose clamps as the supplied bands were to large for the exhaust tubes. I added a Lokar bracket and throttle cable kit designed to work with the Sniper EFI, that was money well spent.

The problem again wasn't the EFI but the truck, the area behind the EFI is crammed with vacuum lines and wiring. Adding the EFI wiring to this just compounded the mess. Once I had everything in place it was easy to program up, select a few options on the display and you're ready to run. The one complaint I have with the Holley system is the fuel pump, it's LOUD, I MEAN LOUD. It's mounted at the rear of the truck (the tank is under the bed) on isolators and you can still hear it over the engine and exhaust.

So you want to know "Would you use the setup again"? Well "NO", not without some prior planning that didn't happen on this build. Adding this type of system requires clearance and proper layout. As for the truck it fired right up , adjust the idle screw to match the setting you programmed into the display and you are done, the EFI does all the rest. It's responsive and runs great at any speed, of course take into consideration all of the other things I have fixed of the engine.