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#1
10-12-2017, 08:43 PM
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How do you run a fuel pressure regulator with steel fuel lines?
I just ordered a steel fuel line to replace the rubber that I have in place between the carb and fuel pump. How are you guys utilizing a fuel pressure regulator with steel fuel lines?
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1970 GTO: Atoll Blue, TH400, 400 +.060, small chamber Ferrea big valve fitted # 15 heads, Summit 2802 cam, Iron intake, Cliff Ruffles 850 cfm qjet, Hooker headers, 2.5 mandrel bent exhaust, Race Pro mufflers, 3.73 Safe-T-Track. |
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#2
10-12-2017, 09:43 PM
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I assume you want to add a pressure regulator in the circuit from the mechanical fuel pump to the carb, correct?
What size is the steel fuel line? Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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#3
10-12-2017, 09:46 PM
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I bend my own.
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---------------------------- '72 Formula 400 Lucerne Blue, Blue Deluxe interior - My first car! '73 Firebird 350/4-speed Black on Black, mix & match. |
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#4
10-12-2017, 09:46 PM
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Yes. It is the stock 3/8" line.
__________________
1970 GTO: Atoll Blue, TH400, 400 +.060, small chamber Ferrea big valve fitted # 15 heads, Summit 2802 cam, Iron intake, Cliff Ruffles 850 cfm qjet, Hooker headers, 2.5 mandrel bent exhaust, Race Pro mufflers, 3.73 Safe-T-Track. |
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#5
10-12-2017, 10:32 PM
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Remove the metal fuel line and cut with a tubing cutter in a straight section where you want the regulator, removing a length the same distance as the distance between the in and out ports (assume inline regulator like Holley). Purchase 3/8" tube nuts (available at NAPA.and slide over the ends of the tubing, Flare the tubing ends with a flaring tool and reinstall. Tubing cutters are available at the hardware store and Autozone loans flaring tools.
Depending on your regulator, you may/may not need adaptor fittings from your local NAPA. You can dead head the regulator (no return line) with a mechanical pump even if the pump does not have a return line to the tank. |
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#6
10-13-2017, 06:35 AM
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Knowing the regulator you plan on running would help with performance expectations and further advice on the regulator plumbing.
Tom V
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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#7
10-13-2017, 07:18 AM
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First off are you running a electric fuel pump that is calling for this need for a regulator, and also what make and model regulator are you installing?
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#8
10-13-2017, 08:10 AM
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Most of the regulators will have NPT threads, 3/8" is the most common. Larger high flow regulators typically use 1/2NPT.
You simply need to get two 3/8" NPT adapters to 3/8" inverted flare (for example), which actually will measure 5/8"-18 for threads if memory serves me correctly. Cut and flare as noted above and make sure to "double flare" or the vibration will cause the lines to break. Nothing at all wrong with using a pressure regulator with a mechanical pump, some put out pretty high pressure especially currently available stock type pumps as there doesn't seem to be any industry standard for those parts these days and most are off-shore production.........Cliff
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If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
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#9
10-13-2017, 06:22 PM
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I am using a mechanical pump, but I have a Carter electric thst im thinking of using. Here is my regulator.
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1970 GTO: Atoll Blue, TH400, 400 +.060, small chamber Ferrea big valve fitted # 15 heads, Summit 2802 cam, Iron intake, Cliff Ruffles 850 cfm qjet, Hooker headers, 2.5 mandrel bent exhaust, Race Pro mufflers, 3.73 Safe-T-Track. |
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#10
10-13-2017, 08:01 PM
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Hope you are not planning on any performance work with your engine and that regulator.
I am sure that it would regulate fuel pressure on a stock engine application. With a performance application that specific regulator would have a hard time flowing enough fuel to support any added HP. The restriction inside is .220. In the old days, guys used to have to use one regulator for each bowl to keep the fuel bowls at the right fuel level under WOT conditions. Which electric fuel pump were you thinking about using? Tom V.
__________________
"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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#11
10-14-2017, 01:47 AM
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I may just remove the regulator all together and see how it runs. This is the electric pump I have.
__________________
1970 GTO: Atoll Blue, TH400, 400 +.060, small chamber Ferrea big valve fitted # 15 heads, Summit 2802 cam, Iron intake, Cliff Ruffles 850 cfm qjet, Hooker headers, 2.5 mandrel bent exhaust, Race Pro mufflers, 3.73 Safe-T-Track. |
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#12
10-14-2017, 10:17 AM
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Well at least you have a decent fuel pump (carter 4070) as a pusher pump.
They work good on a honest street car. The electric fuel pump being a 4-6 psi pump may work fine under a higher fuel demand situation, as far as moving fuel forward to the mechanical fuel pump. Good luck with your street project. Electric pump is nice for priming the carb with some fuel before the initial fire-up. Today's gas disappears in a week or so if the car sits without being fired up. The Holley regulator would work ok with the street fuel system you are proposing. Tom V.
__________________
"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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