Enderle fuel pressure?
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Enderle fuel pressure?

  1. #1
    Senior Member swtd's Avatar
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    Default Enderle fuel pressure?

    What fuel pressure is at the 1/2 in line after the square barrel valve going to the distribution block? And is pressure the same with (race) gas versus methanol? And what is the nozzle pressures at? have a 0-30 psi gauge attatched now. motor has not been started yet! new rebuild 474 c.u. chevy
    Last edited by swtd; 08-25-2011 at 12:10 AM.

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    Bostick Racing Engines six-oh-nine's Avatar
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    It is really going to depend on which fuel pump, what nozzles, and bypass jet you are running. A 30 psi gauge will not be high enough. Some systems run as low as 65 psi... some in the high 100's... just depends on how it was set up.


    Here is a couple of numbers with a 80a pump:
    on gas with .022 nozzles and 150 main jet= about 60psi @ 7000 rpm
    on alky with .030 nozzles and .076 main jet= about 120psi @ 7000 rpm
    on alky with .032 nozzles and .080 main jet= about 80psi @ 7000 rpm
    on alky with .034 nozzles and .100 main jet= about 65psi @ 6000 rpm

    Hope this helps.
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    Members only MAXIMUS's Avatar
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    The fuel psi after the barrel valve will be lower than the inlet psi to the barrel valve. On E85 running an 80-A pump, 36 nozzels, 33 port nozzels & a 95 bypass pill the highest recorded at 7k was about 34 psi at the nozzel distribution block and a touch over 40 psi on the inlet side to the barrel valve. When I changed the pump to a twin gear model which is better than the 80-A but not equivelant to an alky pump, dropped the hat nozzels to 27's and stuck a 105 pill in it jumped up to 80 psi on the inlet side. Didn't measure it again at the distibution block. Better fuel curve as well.

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  6. #4
    Senior Member swtd's Avatar
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    Default nozzles

    Quote Originally Posted by six-oh-nine View Post
    It is really going to depend on which fuel pump, what nozzles, and bypass jet you are running. A 30 psi gauge will not be high enough. Some systems run as low as 65 psi... some in the high 100's... just depends on how it was set up.


    Here is a couple of numbers with a 80a pump:
    on gas with .022 nozzles and 150 main jet= about 60psi @ 7000 rpm
    on alky with .030 nozzles and .076 main jet= about 120psi @ 7000 rpm
    on alky with .032 nozzles and .080 main jet= about 80psi @ 7000 rpm
    on alky with .034 nozzles and .100 main jet= about 65psi @ 6000 rpm

    Hope this helps.
    thanks for info 609. pump is 80a was recommended go with 90-95 pill #24 nozzles for gas and 115 pill with #36 nozzles for my chevy 474. Better get a higher 100 psi gauge then. also have to have a pump redone from enderle for more psi for methanol application.
    Last edited by swtd; 08-30-2011 at 04:36 PM.

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    Senior Member wizbang's Avatar
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    Fuel System Calculation

    I also have a Excel spread sheet of another deal,

    I don't know how to attach it to a thread ????????

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    Senior Member wizbang's Avatar
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    I see, for example, 128 lbs at the barrel, 122 lbs at the # 1 port nozzle.

    All the lines, fittings, bends, 90 degree fittings etc all add up to losses in the pressure !

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    Bostick Racing Engines six-oh-nine's Avatar
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    Quote Originally Posted by wizbang View Post
    I see, for example, 128 lbs at the barrel, 122 lbs at the # 1 port nozzle.

    All the lines, fittings, bends, 90 degree fittings etc all add up to losses in the pressure !
    I always tool my readings off the inlet side of the barrel valve as I figured that would be the most consistant place to take a reading as pretty much all the variables (besides a high speed, but you'd still see) are after it and any changes would be seen as part of the overall system.
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    Senior Member swtd's Avatar
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    Default thanks

    thanks for info.....

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    Canoe Jockey Michael Thomas's Avatar
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    This is just my 2 cents...never set up a injector from your buddies tune up. You can always find someone that will tell you different. I always have my systems flowed. Also I have found and talked to tuners, each one with a different set up or idea. I have been told so many times that I will burn down with my set up but havent yet.. Jim set up my new alky system and it was well into the "safe zone". Spud also does great work....On my gas system on a bbc 482 ..33 nozzles, 135 pill...started with 115, 80a and leaked @ 27%. blower was making 16-18 psi boost....same system e-85....38 nozzles and 100 pill....using square bv.

    Alky system on same engine.(low compression) 65 nozzles, 75 pill with 80a pump,k style bv,leaked @ 35% 18 psi boost...I am posting for reference only..and not to stirr the pot...this works great for me in a lake boat

    It is cheaper to have a system flowed, that it is to change melted pistons
    "If you can't dazzle them with brilliance...Baffle them with bullshit"

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    Senior Member wizbang's Avatar
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    It is cheaper to have a system flowed, that it is to change melted pistons[/QUOTE]

    DING DING DING !

    I have use of a flow bench and flow everything.

    You would be amazed at how very few pills or nozzles flow what they are stamped !

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    Red Blooded American The Doctor's Avatar
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    Quote Originally Posted by Michael Thomas View Post
    This is just my 2 cents...never set up a injector from your buddies tune up. You can always find someone that will tell you different. I always have my systems flowed. Also I have found and talked to tuners, each one with a different set up or idea. I have been told so many times that I will burn down with my set up but havent yet.. Jim set up my new alky system and it was well into the "safe zone". Spud also does great work....On my gas system on a bbc 482 ..33 nozzles, 135 pill...started with 115, 80a and leaked @ 27%. blower was making 16-18 psi boost....same system e-85....38 nozzles and 100 pill....using square bv.

    Alky system on same engine.(low compression) 65 nozzles, 75 pill with 80a pump,k style bv,leaked @ 35% 18 psi boost...I am posting for reference only..and not to stirr the pot...this works great for me in a lake boat

    It is cheaper to have a system flowed, that it is to change melted pistons
    Pay real close attention to this post! Every system is a bit different. Every pump flows a bit more or less and efficiency dies off with time in many cases. The entire package of equipment could easily be flowed to give you a baseline that will be safe. Here's who we use because he flows everything himself and verifies everything:

    Gene Adams Performance
    4778 Fox Drive
    Anderson, CA 96007-9128
    Phone: (530) 357-5570
    The best things in life aren't things!

  14. #12
    Senior Member swtd's Avatar
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    Default Motor

    Once motor is complete with all plumbing the boat will go to GOOD VIBRATIONS (Whittier Ca) for final thoughts Recomendations before being started and leakdown check on Barrel valve Assembly. What a long road to recovery!

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    Canoe Jockey Michael Thomas's Avatar
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    I also noticed in your post you are thinking also methanol..you will have to change the spool in the bv for the fuel you run..on my engine I use the same pump...mine flows 6.2 ..If this is a blown deal, alky blowers don't like gas. But you can run alky through a gas blower if it has the right seals.

    Jim or Casey at GV will get ya going...good luck! keep us posted
    Last edited by Michael Thomas; 08-30-2011 at 05:22 PM.
    "If you can't dazzle them with brilliance...Baffle them with bullshit"

  16. #14
    Senior Member swtd's Avatar
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    Default Nozzles

    Quote Originally Posted by wizbang View Post
    It is cheaper to have a system flowed, that it is to change melted pistons


    DING DING DING !

    I have use of a flow bench and flow everything.

    You would be amazed at how very few pills or nozzles flow what they are stamped ![/QUOTE] Brian I will send you other spare pills and nozzles the #31 single piece and the non flowed #36 2 piece nozzles I have to Experiment with for me. When I go Methanol from gas Ill send you the #24's I have to see where the spread is.

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