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Thread: 390 c6aeu head flow #'s
          
   
   

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  1. #1
    fairlane67 is offline Registered User Visit my Photo Gallery
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    Question 390 c6aeu head flow #'s

     



    does anyone know what kind of numbers the stock 390 heads flow. i need to know the volume of air flow through the intake and exhaust runners any help is greatly appreciated .
    Last edited by fairlane67; 01-01-2006 at 07:38 PM.

  2. #2
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    techinspector1 is offline CHR Member Visit my Photo Gallery
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    Call up your favorite cam grinder and talk to one of the tech guys. They'll have a much better idea than any of us on this board.
    PLANET EARTH, INSANE ASYLUM FOR THE UNIVERSE.

  3. #3
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    RAN THIS UP ON THE ENGINE DYNO PROGRAM, NOT MUCH OF A FORD GUY,ASSUMING YOU HAVE BIG TUBE HEADERS ON MUFFLERS
    HIGH PERFORMANCE PROFILE AT ABOUT .410 LIFT,STOCK HEADS
    YIELDS ABOUT 270 HP@4000 RP'S ,313 FT #'S TORQUE WITH A 750C.F.M. CARB,DOESN'T SEEM TO GAIN ANYTHING IF YOU GO ANY BIGGER!

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    390 Head Flow

     



    Here is the most awesome site I have found for a compilation of head flow numbers, by Stan Weiss. I dont know him but must be a very helpful fellow to post this for everyone!!!


    http://users.erols.com/srweiss/tablehdc.htm

    Some of the Weiss numbers are "ported" - maybe without saying so -

    I think the 390's, unported, flow about 220cfm intake at .500 and 28", and the exhaust about 135.

    The Edelbrocks are about like 427 Medium Risers at about 265 intake and 185 exhaust.

    Cobra Jets (I think) are about halfway between these two.

    Sad thing is, a lot of Chevy and Ford SMALL block heads outflow any of these today. But help is on the way, the FE is getting popular again.

  5. #5
    Brandon's Avatar
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    up here in canada i talk to this guy john yelich at cylinderheadworks.edmontonab.com
    68 Galaxie 500XL

  6. #6
    DennyW is offline Junior Member Visit my Photo Gallery
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    Thumbs up Re: 390 Head Flow

     



    Originally posted by DeuceCoupe
    Here is the most awesome site I have found for a compilation of head flow numbers, by Stan Weiss. I dont know him but must be a very helpful fellow to post this for everyone!!!


    http://users.erols.com/srweiss/tablehdc.htm

    Some of the Weiss numbers are "ported" - maybe without saying so -

    I think the 390's, unported, flow about 220cfm intake at .500 and 28", and the exhaust about 135.

    The Edelbrocks are about like 427 Medium Risers at about 265 intake and 185 exhaust.

    Cobra Jets (I think) are about halfway between these two.

    Sad thing is, a lot of Chevy and Ford SMALL block heads outflow any of these today. But help is on the way, the FE is getting popular again.
    That chart is pretty darn close. The variables depends on intake used, an what rise and rpm range you are shooting for. Mine is a low profile, 67 410. 575 hp at the wheels done on the BHP dyno.

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