How to Plumb in Barry Grant Carb?
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How to Plumb in Barry Grant Carb?

  1. #1
    Senior Member Rivernut's Avatar
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    Default How to Plumb in Barry Grant Carb?

    Got my Marine Demon 650 vac. sec. carb today. My small block Chevy jet boat has an electric pump and 3/8" line I think. I don't know all the names of different fuel fittings and I need help hooking up my Marine Demon to my existing fuel pump. I got a Barry Grant 6 AN flexible stainless dual feed from Jegs. It has a male end fitting. The end of the fuel line going to my current Holley is male also and looks nothing like it. Look at the pics of my current set-up below and tell me what I need to hook the carb to the pump. Thanks.





    Last edited by Rivernut; 07-22-2010 at 06:25 PM.

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    someofamitch
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    post pictures of the new carburetor and flexible line you purchased so everyone can see the whole picture on what you have.

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    Senior Member Schiada 201's Avatar
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    Put in the same place as the Holley they similar

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    Senior Member 500BBC's Avatar
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    Put it on the bench and install a Clay Smith mechanical pump.
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    Senior Member kidd bill's Avatar
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    prob gonna have to build a whole new line,i assume the fuel fitting for the new carb is on the opposite side of the old one. you will need to replace the inverted flare fitting on the pump to a AN style male fitting by male pipe(whatever size thread it is) 2 -6 hose ends straight 90 or whatever you think would work best and a piece of hose however long it needs to be.

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    Senior Member Rivernut's Avatar
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    I added the pic of my carb's dual feed with a 6 AN male connector on its end. How do I hook up this to the standard 3/8" flare fitting on the fuel pump? Is there an adaptor made for that?
    Last edited by Rivernut; 07-22-2010 at 07:19 PM.

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    gn7
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    Quote Originally Posted by Rivernut View Post
    I added the pic of my carb's dual feed with a 6 AN male connector on its end. How do I hook up this to the standard 3/8" flare fitting on the fuel pump? Is there an adaptor made for that?
    first, allow me to show you how i would plumb a Barry Grant carb.




    Now that we have that out of the way. You dont adapt anything. You remove! As in remove the 90* elbow from the fuel pump and toss it where I should tell you to toss the carb. And replace that elbow with this:
    http://www.jegs.com/i/JEGS/555/10014...oductId=752558
    They are impossible to deal with. For a company that was built by the performance enthusiast, they treat you like they are perfect, their product is without flaw, and you shouldn't even touch it. Just send in for adjustment. Can't even buy a rebuild lit for their regulators, but they will rebuild it for a fee. No thanks. He built the biz off the performance group, he will die by the peromance group. Live by the sword, die by the sword.



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    Last edited by gn7; 07-23-2010 at 12:41 PM.

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    Senior Member Schiada 201's Avatar
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    X 2

  11. #9
    Senior Member Rivernut's Avatar
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    Why so sour on Barry Grant's carbs? I've only had Holleys before. I'm replacing a universal 600 vaccum secondary with a Marine Demon 650 Vaccum secondary. They look easier to tune. Does Holley make marine carbs with glass bowl sites?

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    Quote Originally Posted by Rivernut View Post
    . Does Holley make marine carbs with glass bowl sites?
    Sure do. Available at most parts stores.

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    gn7
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    Quote Originally Posted by Rivernut View Post
    Why so sour on Barry Grant's carbs? I've only had Holleys before. I'm replacing a universal 600 vaccum secondary with a Marine Demon 650 Vaccum secondary. They look easier to tune. Does Holley make marine carbs with glass bowl sites?
    You have never had to deal with them. They are perfect, their product is flawless. You can't even get a regulator rebuild kit from them. They will rebuild it for a fee. Which is about 10.00 less than a new one. If he hadn't patterned the carb after a Holley, and used interchangable parts, it never would have gotten off the ground. So he has no chjoice but to sell carb parts. Or we would just use Holley parts, and many do. But for stuff you have to get from him, no can sell. No thanks. He seems to forget that the performance enthusiast built that company. And they can kill it. Live by sword, die by the sword. And it is a dead on copy of a holley, how is it easier to tune. You use exactly the methods and exactly the same parts. Company is hanging by a thread. Couldn't happen to a nicer guy.



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    cfm
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    Quote Originally Posted by Rivernut View Post
    Why so sour on Barry Grant's carbs? I've only had Holleys before. I'm replacing a universal 600 vaccum secondary with a Marine Demon 650 Vaccum secondary. They look easier to tune. Does Holley make marine carbs with glass bowl sites?
    I've used a few BG 650 marine carbs and they have been fine. Get a spring assortment for the vac secondaries and start going with lighter tension springs. End with the one that gives the best performance. Don't be suprised if it's the lightest. Their vacuum pod has a screw off top which makes replacing the springs a one minute job.

    Floats should be set so fuel is halfway up the fuel sight glass, not at the bottom like Holleys.

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    Senior Member Rivernut's Avatar
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    Glass sights, screw lid diaphragm top, knurled & knobby idle screws on all corners, Easy Idle air bleed screw, no metering plate to warp, adjustable metering blocks, all in a great looking MARINE carb for $563. I'm sure some jerks work at Holley too (but they've always been great to me). I took off the fuel bowls, the red gaskets did not tear, another plus. Floats looked adjusted right, and no shavings (Internet myth?). I found two flaws. One of the lower bowl screws was tough to turn, chased the threads on the body and the bolt (12-20). The other flaw was the accelerator pump cam arm was bent inward too much so that it barely contacted the pump arm. I bent it out an 1/8" and all is good.

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    gn7
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    There is no doubt they are capable of making a good product, and he has put in a lot of nice "touches", and forced ALL the others to step up on some of the products they produce. One call to Advanced Engine Design (AED) and you know what customer service is all about. BG just needs to tune up their customers relations alittle And learn that the same people that rebuild carbs may like to rebuild a regulator or a fuel pump.

    That aside, you just change out the elbow fitting in you pump th a 3/8npt X #6 90* elbow fitting and run your new AN line to the new carb flex line. Don't attempt to utilize the existing 90 on the pump.



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