labrat Posted November 10, 2002 Share Posted November 10, 2002 Ok, I just traded a spare carb and 200bux for a complete holley aftermarket fuel injection system. This came off of a good-running 350/Th350 suburban, and was working well, but i'd like to know what I have and where I can find the technical info on how to tune it, although it seems pretty self explanatory. It is a tbi-style system with twin throttle bodies and injectors (that bolt on in place of a squarebore carb), O2 feedback, and a control box that says simply "Holley Fuel Controller". There are five knobs on one end of this control box labeled (in order) Choke, Accel. Pump, idle, Mid Range, and Power. Has anyone seen anything like i've described? I can't seem to find a part number on it, or identify it with any of holley's current products, so I'm assuming it's pretty old. Anyone? Thanks!!!| Bill Quote Link to comment Share on other sites More sharing options...
labrat Posted November 10, 2002 Author Share Posted November 10, 2002 Never mind, I figured it out. It's a holley Pro-Jection 2 analog TBI setup. I was kinda bum-fuzzled because I couldn't find any product data or information at all on this system, but I finally found a picture of the ECU and that told me what I needed to know. Even found someone who had scanned an installation manual as .jpg files (all 21 pages) so I have a manual without paying holley the $21 they wanted for it. HAH! Anyway, looks like I need a few more goodies to get this to work (o2 sensor for closed loop, adjustable bypass style fuel pressure regulator, and holley's coolant temp sensor), then BYE BYE CARB! Bill Quote Link to comment Share on other sites More sharing options...
Guest greimann Posted November 10, 2002 Share Posted November 10, 2002 Holley uses a lot of GM OEM parts for sensors and IAC and such. Take a picture or a connector to your local parts house and they may be able to cross-reference it for you . Quote Link to comment Share on other sites More sharing options...
labrat Posted November 11, 2002 Author Share Posted November 11, 2002 Does anyone have any feedback as far as the quality of this system? It's a two barrel 670 CFM system, and I think it has the closed loop option added on (at least the truck it was on had an O2 sensor...). I found out the fuel pressure regulator is built into the TB, and I think my chevy temp sender should work Ok, just need an A/F guage to tune open loop with... Quote Link to comment Share on other sites More sharing options...
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