- Aug 14, 2014
- Reaction score
- Madison, WI
- My Car
- 1971 M-Code Mach 1 w/408C stroker
There are other options. I run a mechanical fuel pump that feeds the Robbmc Powersurge Pump (https://www.robbmcperformance.com/products/powersurge.html). This pump has a submerged electrical pump in what is about 1/2 gallon tank. I used the stock tank breather tube to the charcoal canister as a return. This involved getting rid of the charcoal canister, installing a new stock line just to make sure all is clean, opening the top tank vent return port and making sure the tank can breath through the gas cap.Its been a while and that little voice in my head is back telling me to try out some sort of EFI conversion. If I'm wanting to prioritize being able to roll the process back in the event that it doesn't work well or I can't get spare parts, what is the least invasive route?
I think a sniper style setup that mounts to a carburetor pattern lets you do EFI with the least amount of modifications to the engine. Where I'm stuck is the fuel system. It looks like all the options I've seen require replacing the whole tank, cutting a big hole in the top of the tank for a new drop in pump, or at the very least drilling a hole somewhere to install a bulkhead for the return line.
There doesn't look like enough room on the factory sending unit to install the return bulkhead.
I have seen people saying they install the return into the fuel filler neck. Thats in the trunk. From the factory, all the fuel in the trunk area is separate from the passenger compartment by steel. I'm not overly excited about the idea of running a high pressure rubber fuel line and adding in more fittings and gaskets that may eventually leak. Any fuel leak you created by adding a bulkhead to the filler neck would not be sealed away from the passenger compartment.
How else are guys handling the return lines? Short of running the holley "returnless" intank pump which requires cutting a huge hole in the tank anyways.
The more I read about this system, the more I like it. They claim to use all GM OEM sensors and a Bosch O2 sensor. I would be happier if the warranty was longer than 1 year. I also wanted to know if this would work with a Mallory Unilite distributor I picked up, recently. Basstrix, did you...