Bypass fuel pressure regulator systems
 

Has anyone converted their carbureted combination to a bypass system? I'm talking about a system that uses small lines from the pressure regulator that go into a y-block and then back to the fuel cell. If so, it would be great to know what your results were (steadier pressure, additional MPH, ET improvement, or annoying side effects). Thanks.

Re: Bypass fuel pressure regulator systems
 

My car is set up that way, mainly so I can go from EFI to carb. Would think best to confirm with your pump manufacturer to make sure it's up to the task. Can't imagine a down side....except of course the gentleman that had the "breaks up at 4500rpm" issue which was solved. BTW there is only 1 return line on my setup (Aeromotive) no Y blocks involved.

Re: Bypass fuel pressure regulator systems
 

I have the Magna Fuel system on a super stock car. It is a jetted return from reg back to tank. I think a .035 jet into a -4 line to tank. What I noticed with my fuel pressure gauge is that the pressure stayed the same throughout the run with less needle bounce also. Cant say any ET gain.

Re: Bypass fuel pressure regulator systems
 

When I put the bypass on, the fuel pressure was a bit more stable. Didn't see any performance improvement but the pump is noticeably cooler. Make sure to extend the bypass line in the tank so it's covered by fuel and isn't aerating the fuel in the tank when it dumps back in.

Re: Bypass fuel pressure regulator systems
 

Absolutely no change, no improvement whatsoever.

Re: Bypass fuel pressure regulator systems
 

Mike, call John Rademacher @ Product Engineering, he can explain it better than me.

Re: Bypass fuel pressure regulator systems
 

My fuel system is all John's aka Product Engineering. Again absolutely NO change, no improvement, no difference. Save your $.

http://i381.photobucket.com/albums/o...ps2rnxpcdl.jpg

Re: Bypass fuel pressure regulator systems
 

Thanks to everyone for their responses. Based on 1320racer's comments and photograph, I have to ask if you had a fuel pressure-based problem when you decided to put the bypass kit on? It looks from the picture that you're using -8 line into the regulator and either -6 or -8 out. Does the car use a QuadraJet, or a 4GC? I guess the key question is, were you hoping to cure a problem and the bypass didn't help (i.e. you still have the problem), were OK but put the bypass system on to guarantee you wouldn't ever have a problem, or put the bypass system on because you were assured that it would pick the car up? Thanks in advance for your answer.

Re: Bypass fuel pressure regulator systems
 

1320 racer is an expert, even though he doesn't race a super stock car.

Re: Bypass fuel pressure regulator systems
 

Actually I do.:p

My car is a former super stocker built by the best, MPR, that now has a 900+HP BBC bracket engine under the hood that accelerates it well into the 8's and it's a safe bet I've made more passes down a 1/4 mile than most class racers over the past 25 years.

Back to the OP's question... -8 in and -8 out feeding a Holley 850. Just had the bypass kit laying around for years so I finally decided to put it on.