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Hard mounting your fuel regulator to the motor?
#1835404
05/27/15 04:52 PM
05/27/15 04:52 PM
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Joined: May 2015
Posts: 19
TX
Kotta390
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TX
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Hey guys, new here just not new to Mopars  . I decided to join this community because it was long overdue. I have a 1989 Dakota that I am building a street truck out of by using my previous race motor that I had in a Gen 3 99 Dakota. Adobedude knows who I am. Anyways I had a question. Why is it bad to hard mount your fuel regulator to the motor? I can understand vibrations may screw with the reading of your fuel pressure gauge but in the past I have hard mounted mine and never had any issues? Any advice or thoughts? My new setup will be the same but going E85 instead of race fuel. I will also be running polyurethane mounts instead of solid mounts.
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Re: Hard mounting your fuel regulator to the motor?
[Re: Kotta390]
#1835406
05/27/15 04:56 PM
05/27/15 04:56 PM
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Joined: Jan 2003
Posts: 13,357
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,357
Marion, South Carolina [><]
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I've never heard of it being a bad thing.  LOTS of people run them that way. Always had mine mounted to the motor and never had any issues.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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Re: Hard mounting your fuel regulator to the motor?
[Re: Kotta390]
#1835594
05/27/15 10:31 PM
05/27/15 10:31 PM
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Joined: Sep 2007
Posts: 1,890
Spahn Ranch
RMCHRGR
top fuel
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top fuel
Joined: Sep 2007
Posts: 1,890
Spahn Ranch
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This is what I have.  There is a kit from AED you can get with pre-bent stainless lines and the aluminum fittings. I made the one in the pic myself though. AED fuel lines They also have a bracket that you mount to the carb base and the regulator hangs off of it. AED Bracket I couldn't use it though because the bottom of the regulator was hitting the intake runner. I will sell it to you if you want, PM me. The lines hold it tight enough without the bracket. I have run it like that on the street and at the track a handful of times and it's never leaked once. I've had it apart a zillion times too.
'71 Duster
'17 Ram 1500
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Re: Hard mounting your fuel regulator to the motor?
[Re: AndyF]
#1835632
05/27/15 11:24 PM
05/27/15 11:24 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Lots of people do it that way but the pros usually hang the regulator from the fuel lines in order to reduce vibration. They do a lot of stuff to keep the fuel from getting frothy with air bubbles. That's right, in high horsepower engines can create some serious vibrations and can lift the diaphragm off it's seat more or less during extreme vibration in regulators and in check/poppet valves in fuel injection. . Should always try to provide some vibration isolation. Frothy air bubbles...  Definitely don't want them in front of the fuel pump, after up by the engine not as much of a concern at that point.
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Re: Hard mounting your fuel regulator to the motor?
[Re: Kotta390]
#1835639
05/27/15 11:35 PM
05/27/15 11:35 PM
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Joined: Aug 2003
Posts: 43,127
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,127
Bend,OR USA
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I've mounted several different brands and sizes of fuel regs. on of the front motor plate or elephant ears awith no real consequences that I'm aware of I have had them hooked into a hard aluminum fuel line laying on the intake manifold under the carb. also  , I don't do that anymore  I think Monte Smith put on one of his comments to mount the regulator in front of the carb. so the high pressure fuel is fed into the regulator in front of the needles and seats and then reduce in pressure back to the carb.
Last edited by Cab_Burge; 05/27/15 11:36 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Hard mounting your fuel regulator to the motor?
[Re: Kotta390]
#1835699
05/28/15 12:35 AM
05/28/15 12:35 AM
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Joined: Sep 2007
Posts: 1,890
Spahn Ranch
RMCHRGR
top fuel
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top fuel
Joined: Sep 2007
Posts: 1,890
Spahn Ranch
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I am going to need -8an lines from the regulator to the bowls. I'm running e85 and est. 600hp crank NA. So I think I will probably have to make my own I'm sure. I haven't thought about the bracket hitting the runners of the intake though...? I have an Indy 360-M and that is a pretty big intake for a small block. If you are referring to what I was saying about my setup - it wasn't the bracket itself hitting the intake. (Victor W2) The problem is that the bracket puts the regulator right over the runner and there was no room for the fuel line. I used a 90* adapter for the bottom feed. My fuel line comes off a mechanical pump in front though so if you have an electric you have some more options. It would probably be easier with the feed line coming up the back of the motor, you could run it under the intake. I stumbled on the way I have it set up, just wanted to see if it would work and it did since the bracket was a no-go. I called AED and they said it was fine to run it without the bracket. If the bracket just extended a little farther back it would have been fine. Only thing I could think of was that they designed it with something other than a SBM with a single plane. You could put it in front where there is no runner interference but then the lines become tough to deal with since the regulator is in front of the bowl. There are other brackets out there. Allstar makes ones for 4150 and Dominator. Allstar bracket. Or make your own bracket if it's how you want to solve the issue, it's not that hard. The AED bracket should give you a good idea of what to do. Just won't be fancy anodized billet.
'71 Duster
'17 Ram 1500
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Re: Hard mounting your fuel regulator to the motor?
[Re: RMCHRGR]
#1835750
05/28/15 01:44 AM
05/28/15 01:44 AM
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Joined: May 2015
Posts: 19
TX
Kotta390
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TX
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I am going to need -8an lines from the regulator to the bowls. I'm running e85 and est. 600hp crank NA. So I think I will probably have to make my own I'm sure. I haven't thought about the bracket hitting the runners of the intake though...? I have an Indy 360-M and that is a pretty big intake for a small block. If you are referring to what I was saying about my setup - it wasn't the bracket itself hitting the intake. (Victor W2) The problem is that the bracket puts the regulator right over the runner and there was no room for the fuel line. I used a 90* adapter for the bottom feed. My fuel line comes off a mechanical pump in front though so if you have an electric you have some more options. It would probably be easier with the feed line coming up the back of the motor, you could run it under the intake. I stumbled on the way I have it set up, just wanted to see if it would work and it did since the bracket was a no-go. I called AED and they said it was fine to run it without the bracket. If the bracket just extended a little farther back it would have been fine. Only thing I could think of was that they designed it with something other than a SBM with a single plane. You could put it in front where there is no runner interference but then the lines become tough to deal with since the regulator is in front of the bowl. There are other brackets out there. Allstar makes ones for 4150 and Dominator. Allstar bracket. Or make your own bracket if it's how you want to solve the issue, it's not that hard. The AED bracket should give you a good idea of what to do. Just won't be fancy anodized billet. Yeah that makes more sense now. I was going to use the bracket made by Magnafuel since I'm going a full magnafuel setup and the only thing they don't offer is the fuel lines coming off the regulator to the bowls. I like the idea of running the fuel line from the back of the motor and under the intake, which God knows there is plenty of room lol! I will look into it some more and figure out how I want to go about it. I just don't have a tubing bender and cutting and fitting the stainless braided lines kinda suck haha. Thanks for the info.
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Re: Hard mounting your fuel regulator to the motor?
[Re: Kotta390]
#1836022
05/28/15 03:10 PM
05/28/15 03:10 PM
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Joined: Jan 2003
Posts: 19,361
Las Vegas
Al_Alguire
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I Live Here
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Posts: 19,361
Las Vegas
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AS for the question on the Forum, if you go to Moparts forums and scroll down you will find for sale sections on just about everything. There is a raceparts section as well as engine and body specific areas.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Hard mounting your fuel regulator to the motor?
[Re: Kotta390]
#1836046
05/28/15 03:36 PM
05/28/15 03:36 PM
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Joined: Sep 2007
Posts: 1,890
Spahn Ranch
RMCHRGR
top fuel
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top fuel
Joined: Sep 2007
Posts: 1,890
Spahn Ranch
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What carb? 4150 or Dominator? Hate to keep pushing their products but AED has a stainless line kit for the Magnafuel regulator with a Dominator. They do make -8 lines for the Ultra HP carbs. Line kit If you're not able to fab the lines by yourself, then just get what you need.
'71 Duster
'17 Ram 1500
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Re: Hard mounting your fuel regulator to the motor?
[Re: Kotta390]
#1836054
05/28/15 03:52 PM
05/28/15 03:52 PM
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Joined: Jan 2003
Posts: 19,361
Las Vegas
Al_Alguire
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 19,361
Las Vegas
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Nothing it touching anything.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Hard mounting your fuel regulator to the motor?
[Re: RMCHRGR]
#1836056
05/28/15 03:56 PM
05/28/15 03:56 PM
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Joined: May 2015
Posts: 19
TX
Kotta390
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What carb? 4150 or Dominator? Hate to keep pushing their products but AED has a stainless line kit for the Magnafuel regulator with a Dominator. They do make -8 lines for the Ultra HP carbs. Line kit If you're not able to fab the lines by yourself, then just get what you need. Its a Pro Systems 950hp 4150 carb. Sucks that is the kit I would probably need but its for a 4500 series 
Last edited by Kotta390; 05/28/15 03:58 PM.
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Re: Hard mounting your fuel regulator to the motor?
[Re: Kotta390]
#1836062
05/28/15 04:11 PM
05/28/15 04:11 PM
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Joined: Sep 2007
Posts: 1,890
Spahn Ranch
RMCHRGR
top fuel
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top fuel
Joined: Sep 2007
Posts: 1,890
Spahn Ranch
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Huh. Well, maybe call them and see if they might have something that will work for you. I mentioned they do have #8 lines for the Ultra HP carbs, maybe they will be OK.
Like the bracket that wouldn't fit my situation, they probably designed the Magnafuel line kit with the idea that anyone using that regulator is most likely using a Dominator.
'71 Duster
'17 Ram 1500
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