Carb size limitations, roots blown bbc
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Carb size limitations, roots blown bbc

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    Default Carb size limitations, roots blown bbc

    Buddy is building a 522ci, AFR full CNC heads, 10-71 Little Fields, blower shop intercoolers, 8.25:1 static. Gonna be a hyd roller around 680-700 lift custom cam.

    Right now he has a pair of 4150 "930" Nickerson carbs. These carbs are 750 bodies, that nickerson ground the choke towers off, and did his porting or whatever he does to get them to supposedly flow 930cfm. My buddy plans to try and run 10-12psi on pump gas with this combo, and hopefully make over 1000hp.

    He's worried the carbs will be too small for him. Nickerson told him he might want a pair of dominators. Any thoughts?

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    gn7
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    Quote Originally Posted by Mild Thunder View Post
    Buddy is building a 522ci, AFR full CNC heads, 10-71 Little Fields, blower shop intercoolers, 8.25:1 static. Gonna be a hyd roller around 680-700 lift custom cam.

    Right now he has a pair of 4150 "930" Nickerson carbs. These carbs are 750 bodies, that nickerson ground the choke towers off, and did his porting or whatever he does to get them to supposedly flow 930cfm. My buddy plans to try and run 10-12psi on pump gas with this combo, and hopefully make over 1000hp.

    He's worried the carbs will be too small for him. Nickerson told him he might want a pair of dominators. Any thoughts?
    At 6000 he needs 900 cfm each
    At 6000 he needs 825 cfm each
    Both should be consider minimums at 12 lbs

    If they REALLY flow 930, he should be OK.



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    Quote Originally Posted by gn7 View Post
    At 6000 he needs 900 cfm each
    At 6000 he needs 825 cfm each
    Both should be consider minimums at 12 lbs

    If they REALLY flow 930, he should be OK.
    These 750 carb bodies scare me. Is it possible to get 930 cfm out of them ? These carbs make me think of the holley 950s that don't flow anywhere near 950 :/

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    Quote Originally Posted by Mild Thunder View Post
    These 750 carb bodies scare me. Is it possible to get 930 cfm out of them ? These carbs make me think of the holley 950s that don't flow anywhere near 950 :/
    It would take a lot more than milled choke horns to get them to flow 930.
    Yeah, you are correct, the original 950 HP does not flow as well as a 850.
    My 2 cents, he will come up short of optimum for that setup. 2 1050 Doms would be a much better choice. But at least 2 950 Ultra HPs which flow much better than the original 950 HP.



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    Quote Originally Posted by Mild Thunder View Post
    Buddy is building a 522ci, AFR full CNC heads, 10-71 Little Fields, blower shop intercoolers, 8.25:1 static. Gonna be a hyd roller around 680-700 lift custom cam.

    Right now he has a pair of 4150 "930" Nickerson carbs. These carbs are 750 bodies, that nickerson ground the choke towers off, and did his porting or whatever he does to get them to supposedly flow 930cfm. My buddy plans to try and run 10-12psi on pump gas with this combo, and hopefully make over 1000hp.

    He's worried the carbs will be too small for him. Nickerson told him he might want a pair of dominators. Any thoughts?
    Yes, Go with the Dominators

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    Thanks for the tips guys. What do you guys think of the quick fuel 1050 carbs, that are 4150 based?

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    Quote Originally Posted by Mild Thunder View Post
    Buddy is building a 522ci, AFR full CNC heads, 10-71 Little Fields, blower shop intercoolers, 8.25:1 static. Gonna be a hyd roller around 680-700 lift custom cam.

    Right now he has a pair of 4150 "930" Nickerson carbs. These carbs are 750 bodies, that nickerson ground the choke towers off, and did his porting or whatever he does to get them to supposedly flow 930cfm. My buddy plans to try and run 10-12psi on pump gas with this combo, and hopefully make over 1000hp.

    He's worried the carbs will be too small for him. Nickerson told him he might want a pair of dominators. Any thoughts?
    What would your final compression ratio be? Will pump gas be enough?

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    gn7
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    Quote Originally Posted by Mild Thunder View Post
    Thanks for the tips guys. What do you guys think of the quick fuel 1050 carbs, that are 4150 based?
    If he is trying to save the fuel lines, carb adaptor, and flame arrestor, I'd give AED a call and see what they can do to get him the 1000 CFM range with a 4150 blower carb.

    AED CARBS



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    Last edited by gn7; 05-06-2014 at 05:38 AM.

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    Quote Originally Posted by Mild Thunder View Post
    These 750 carb bodies scare me. Is it possible to get 930 cfm out of them ? These carbs make me think of the holley 950s that don't flow anywhere near 950 :/
    It is possible to get 950+ out of a 750 and used to be a common build. You use larger base plate (larger throttle blades) the milling of the choke shroud is only worth appox 50 cfm

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    gn7
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    You're going to have do more than a larger base and milled choke.
    That pretty much the same as a Holley 950 HP. 850 base under a 750 body. They don't flow as much as a 4781 850 DP



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    Last edited by gn7; 05-12-2014 at 10:26 PM.

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