timsz Posted January 8, 2015 Share Posted January 8, 2015 I want to run my fuel line as in the pic. It shows a fuel pressure regulator and a guage. What's the difference? What does each do? I thought I knew but now I can't remember or find any info. Thank you very much. Quote Link to comment Share on other sites More sharing options...
ryant67 Posted January 8, 2015 Share Posted January 8, 2015 That's pretty much what I am planning to do this Spring with my 240Z. I currently have the 'usual' dead head fuel line set up with a regulator before the triple Mikunis, with the fuel line stopped at the 3rd carb, no return. My Holley fuel pump makes one hell of a racket in this setup, and apparently it won't last terribly long in a dead head setup due to overheating with a lack of fuel flow through it for cooling. The regulator in that set up is after the carbs in the fuel flow direction, and it basically bleeds off excess fuel pressure into a return line to the tank. This is ideal, as it should provide a more stable fuel pressure into the carbs. The pressure gauge will plug into an unused output port on the regulator, allowing you to confirm you have your fuel pressure set at the correct level. Quote Link to comment Share on other sites More sharing options...
timsz Posted January 8, 2015 Author Share Posted January 8, 2015 Thank you Quote Link to comment Share on other sites More sharing options...
Tony D Posted January 10, 2015 Share Posted January 10, 2015 I don't know. What good a gauge there does. Before the regulator maybe.... Quote Link to comment Share on other sites More sharing options...
ryant67 Posted January 10, 2015 Share Posted January 10, 2015 Fair point, Tony. In that diagram, measuring the fuel pressure post-regulator wouldn't be very useful, since it wouldn't in any way indicate what's happening before the regulator, which is where the carbs are getting their fuel, haha! Moving the pressure gauge to immediately before the fuel pressure regulator, perhaps using an AN fitting to plumb to it, would actually allow you to see what your fuel pressure to the carbs is. Would this set up require a specific style of regulator, such as a bypass regulator? I am running the Holley 12-803 right now, before the carbs, but I can't seem to grasp how it would work post carbs, since it would be static. Quote Link to comment Share on other sites More sharing options...
Tony D Posted January 11, 2015 Share Posted January 11, 2015 Bypass regulator Quote Link to comment Share on other sites More sharing options...
ryant67 Posted January 11, 2015 Share Posted January 11, 2015 Bypass regulator Thank you sir! Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.