HOME FORUM RULES CONTACT
     
   
   

Go Back   CLASS RACER FORUM > Class Racer Forums > Stock and Super Stock Tech


Reply
 
Thread Tools Display Modes
Old 11-24-2015, 03:51 PM   #1
nhramnl
Senior Member
 
Join Date: Feb 2010
Posts: 504
Likes: 7
Liked 352 Times in 82 Posts
Default 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.
nhramnl is offline   Reply With Quote
Old 11-24-2015, 04:35 PM   #2
buzzinhalfdozen
Senior Member
 
Join Date: Sep 2006
Location: Bellevue Ohio
Posts: 985
Likes: 0
Liked 12 Times in 9 Posts
Default 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.
__________________
Joe Buchanan SS/BX 3117
buzzinhalfdozen is offline   Reply With Quote
Old 11-24-2015, 05:01 PM   #3
Jeff Stout
VIP Member
 
Join Date: Dec 2001
Location: phoenix
Posts: 1,405
Likes: 53
Liked 653 Times in 253 Posts
Default 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.
Jeff Stout is offline   Reply With Quote
Old 11-26-2015, 12:05 PM   #4
Alan Nyhus
VIP Member
 
Join Date: Dec 2002
Location: Lower Dakota territory
Posts: 1,162
Likes: 1,012
Liked 761 Times in 225 Posts
Default 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.
__________________
"That'll never work....."
Alan Nyhus is offline   Reply With Quote
Old 11-27-2015, 09:27 PM   #5
1320racer
VIP Member
 
1320racer's Avatar
 
Join Date: Nov 2007
Location: New Jersey
Posts: 1,761
Likes: 66
Liked 380 Times in 180 Posts
Default Re: Bypass fuel pressure regulator systems

Quote:
Originally Posted by nhramnl View Post
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.
Absolutely no change, no improvement whatsoever.
1320racer is offline   Reply With Quote
Old 11-27-2015, 09:35 PM   #6
JHeath
Senior Member
 
JHeath's Avatar
 
Join Date: Jul 2004
Location: Minneapolis
Posts: 788
Likes: 2,890
Liked 370 Times in 102 Posts
Default Re: Bypass fuel pressure regulator systems

Mike, call John Rademacher @ Product Engineering, he can explain it better than me.
__________________
Jerry Heath
I/S '93 Cobra
FS/J 2010 Mustang "Ebay CJ"
JHeath is offline   Reply With Quote
Old 11-27-2015, 09:51 PM   #7
1320racer
VIP Member
 
1320racer's Avatar
 
Join Date: Nov 2007
Location: New Jersey
Posts: 1,761
Likes: 66
Liked 380 Times in 180 Posts
Default 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 $.


Last edited by 1320racer; 11-27-2015 at 10:06 PM.
1320racer is offline   Reply With Quote
Old 11-27-2015, 11:45 PM   #8
nhramnl
Senior Member
 
Join Date: Feb 2010
Posts: 504
Likes: 7
Liked 352 Times in 82 Posts
Default 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.
nhramnl is offline   Reply With Quote
Old 11-27-2015, 11:56 PM   #9
JHeath
Senior Member
 
JHeath's Avatar
 
Join Date: Jul 2004
Location: Minneapolis
Posts: 788
Likes: 2,890
Liked 370 Times in 102 Posts
Default Re: Bypass fuel pressure regulator systems

1320 racer is an expert, even though he doesn't race a super stock car.
__________________
Jerry Heath
I/S '93 Cobra
FS/J 2010 Mustang "Ebay CJ"
JHeath is offline   Reply With Quote
Old 11-28-2015, 12:01 AM   #10
1320racer
VIP Member
 
1320racer's Avatar
 
Join Date: Nov 2007
Location: New Jersey
Posts: 1,761
Likes: 66
Liked 380 Times in 180 Posts
Default Re: Bypass fuel pressure regulator systems

Actually I do.

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.

Last edited by 1320racer; 11-28-2015 at 12:21 AM.
1320racer is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 01:20 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright © Class Racer.com. All Rights Reserved. Designated trademarks and brands are the property of their respective owners.