Fuel Return - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans Advertise
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 03-19-2014, 06:08 PM
Registered User
 
Join Date: Mar 2014
Posts: 1
Wiki Edits: 0

Thanks: 2
Thanked 0 Times in 0 Posts
Fuel Return

I now have a fuel cell in the bed of my truck feeding directly to the carb. The carb is a quadrajet on a 454 big block, My pump is a Mr. Gasket #105. I bypassed the regulator completely which I assume is causing my carb to over flow... My question is what will happen if I hook up the regulator while capping the return line(I want to avoid drilling a hole for a return line in my fuel cell)? Is this something I can get away with or am I a just going to have to bite it and drill a hole?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 03-19-2014, 06:14 PM
techinspector1's Avatar
Member
 
Last wiki edit: DynoSim combinations
Join Date: Oct 2005
Location: Zephyrhills, Florida, USA
Age: 77
Posts: 16,917
Wiki Edits: 326

Thanks: 1,890
Thanked 2,804 Times in 2,099 Posts
Most commercially-available fuel cells have at least two outlets, one of which could be used as a return. Dead-heading the fuel against a regulator will shorten pump life and heat the fuel.
Reply With Quote Quick reply to this message
The Following User Says Thank You to techinspector1 For This Useful Post:
CodyBob (03-19-2014)
  #3 (permalink)  
Old 03-19-2014, 09:06 PM
4 Jaw Chuck's Avatar
Hotrodders.com Moderator
 
Join Date: Mar 2002
Location: Manitoba, Canada
Age: 51
Posts: 6,620
Wiki Edits: 0

Thanks: 190
Thanked 574 Times in 425 Posts
...or run a low pressure electric Carter pump, no return needed.
__________________
“She may not look like much, but she's got it where it counts, kid. I've made a lot of special modifications myself.”

— Han Solo
Reply With Quote Quick reply to this message
The Following 2 Users Say Thank You to 4 Jaw Chuck For This Useful Post:
CodyBob (03-19-2014), NEW INTERIORS (03-19-2014)
 
  #4 (permalink)  
Old 03-19-2014, 09:11 PM
sqeezeit's Avatar
Registered User
 
Join Date: Apr 2013
Location: ND
Age: 42
Posts: 363
Wiki Edits: 0

Thanks: 30
Thanked 5 Times in 5 Posts
would the carter p4389 work for this?
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 03-20-2014, 12:34 PM
bondo's Avatar
Member
 
Join Date: Nov 2002
Location: Chaumont Bay N.Y.
Posts: 972
Wiki Edits: 0

Thanks: 11
Thanked 18 Times in 18 Posts
Quote:
Originally Posted by sqeezeit View Post
would the carter p4389 work for this?
Ayuh,... That would be Correct,...
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 03-20-2014, 12:41 PM
4 Jaw Chuck's Avatar
Hotrodders.com Moderator
 
Join Date: Mar 2002
Location: Manitoba, Canada
Age: 51
Posts: 6,620
Wiki Edits: 0

Thanks: 190
Thanked 574 Times in 425 Posts
Quote:
Originally Posted by sqeezeit View Post
would the carter p4389 work for this?
Yep, I like them...quiet compared to a Holley pump too. Need to verify if they flow enough for your application though, I've doubled them up and plumbed to both ends of a fuel log to get more flow rate to feed a Holley DP before. Ran a single to a Holley 650DP on my Mazda rotary for road racing, very reliable

Doubled up they give you fail safe for many applications such as marine where you may need it.

Cheap like Borscht!
__________________
“She may not look like much, but she's got it where it counts, kid. I've made a lot of special modifications myself.”

— Han Solo
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 03-20-2014, 12:56 PM
sqeezeit's Avatar
Registered User
 
Join Date: Apr 2013
Location: ND
Age: 42
Posts: 363
Wiki Edits: 0

Thanks: 30
Thanked 5 Times in 5 Posts
Quote:
Originally Posted by 4 Jaw Chuck View Post
Yep, I like them...quiet compared to a Holley pump too. Need to verify if they flow enough for your application though, I've doubled them up and plumbed to both ends of a fuel log to get more flow rate to feed a Holley DP before. Ran a single to a Holley 650DP on my Mazda rotary for road racing, very reliable

Doubled up they give you fail safe for many applications such as marine where you may need it.

Cheap like Borscht!


I wonder what the difference is between the carter 4389 and 4070? Im thinking of using this or one of these also.They dont need return or reg as far as I know but wouldnt a return be better for it or not a big deal with this one?
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 03-20-2014, 02:52 PM
ericnova72's Avatar
More for Less Racer
 
Join Date: Jan 2007
Location: S.W. Lower Michigan
Age: 52
Posts: 17,533
Wiki Edits: 0

Thanks: 269
Thanked 3,160 Times in 2,650 Posts
Quote:
Originally Posted by sqeezeit View Post
I wonder what the difference is between the carter 4389 and 4070? Im thinking of using this or one of these also.They dont need return or reg as far as I know but wouldnt a return be better for it or not a big deal with this one?
#4070 is automotive application, #4389 is marine application. Only difference is marine is coated for corrosion resistance(black powdercoat I believe). Summit's online pics don't show a difference due to generic photo.

CodyBob, your #105P pump and regulator are the same as Holley #12-802-1 "Blue" pump and regulator kit, which comes with the Holley #12-803 regulator. These regulators are a "deadhead" style, which means no return line. You have to use the regulator, pump puts out 9 PSI, way too much for the Q-jet float to handle. Just plug the unused port in the regulator and then adjust to 4-5 psi.

It takes a different regulator to run with a return line - Holley #12-803BP(BP for By-Pass)
Reply With Quote Quick reply to this message

Tags
carb, fuel cell, return line

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Insurance
Please select your insurance company (Optional)

Log-in



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
What to do with fuel return? bonuts Engine 5 08-12-2013 08:11 AM
fuel return? Bauer1287 Engine 3 08-21-2011 06:00 PM
Holley fuel pump, return line or not to return line??? JD's camaro Engine 1 07-16-2010 05:17 PM
fuel return line Q nova 1 kenobi Engine 6 03-13-2005 05:25 PM
fuel return line 71 Red Sled Engine 3 03-18-2004 08:14 PM


All times are GMT -6. The time now is 05:52 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.