wrxand280z Posted September 10, 2007 Share Posted September 10, 2007 Sorry if this has already been answered but I have done 3-4 searches and I can't seem to find the answer. I'm running a sbc with an edelbrock carb and I know my 280z fuel pump will not work as it is. 1. Should I replace the fuel pump with an aftermarket fuel pump or should I get a fuel by pass regulator that regulates the pressure to 6.5psi and returns the rest to the pump for cooling? 2. If I replace the fuel up with an inline pump I know I need a regulator and gauge. What do I do with the other two lines? 3. What are the other 2 lines used for? I know ones a return line but whats the 3rd line used for and do I need it? Thanks, Joe Quote Link to comment Share on other sites More sharing options...
naviathan Posted September 10, 2007 Share Posted September 10, 2007 The three lines are fuel feed, fuel return and vapor vent to the charcoal canister. A simple replacement pump pushing 10psi should work fine for the carb, a regulator should have a return on it to keep from over pressurizing the system and burning up the pump. I'm pretty sure all of this has been covered somewhere. Look around at Summit racing and you should find everything you need. Quote Link to comment Share on other sites More sharing options...
Pop N Wood Posted September 10, 2007 Share Posted September 10, 2007 This is a pretty good read http://www.centuryperformance.com/fuel.asp There guidelines for fuel line sizes seem to be on the high side. Most guys seem to get by with less. A lot of guys seem to run fine with a single line and a dead head regulator. But I think everyone also agrees that a return style regulator is a superior set up. It can also be a good bit more expensive for a quality regulator and a second return line. The cost of fittings can really add up quick. A lot of it depends on your HP goal. You may want to upgrade to all 3/8 inch line. This will give you good growth potential. Quote Link to comment Share on other sites More sharing options...
wrxand280z Posted September 11, 2007 Author Share Posted September 11, 2007 Thanks for all of the feed back. I guess I will reuse the stock lines for now using a 10psi fuel pump and a fuel regulator. Can I pull out the vapor line? Or does it need to be plumbed so the tank can vent? Quote Link to comment Share on other sites More sharing options...
Pop N Wood Posted September 11, 2007 Share Posted September 11, 2007 I took mine out of my 240 and just vented the tank to air. I needed the room for larger than stock fuel lines. But you still need a tank vent. A lot of guys leave it in and plumb it to a charcoal cannister. It doesn't hurt performance and does keep fumes from the atmosphere. Quote Link to comment Share on other sites More sharing options...
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