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Thread: Cylinder head flow #'s

  1. #151
    Join Date
    May 2002
    Location
    NYC
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    17,429
    You had sent me pictures of yoru intake..Definately had plenty of plenum volume from the look of it and definitely had longer runners then what Dans putting together. We wouldnt have that type of hood clearence though..Maybe not even with the cowl hood on an sc
    Last edited by XxSlowpokexX; 07-22-2006 at 12:03 PM.
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  2. #152
    Join Date
    Jan 2004
    Location
    Outside KC MO
    Posts
    5,791
    Do you have a link that shows your build on that intake Matt? I am very interested in that but how did we get on intakes for sooo many pages? Espically when it is titled Cyl head flow numbers?

    Seriously though...Since Matt is here now...What are your head flow numbers? The current ones, not the ones being done. How many more cfms are you looking to gain with your new setup?

    Chris

  3. #153
    Join Date
    Aug 2004
    Posts
    203
    http://www.v6power.net/vb/showthread.php?t=25303&page=2

    on the 2nd page you can see the intake. there is a few side shots and i think one Front shot of it.


    also my old heads Flowed around 190cfm on the intake and 145 on the exhuast with Stock single port valves. my new heads are gonna flow Alot more.

  4. #154
    Join Date
    Jan 2004
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    Outside KC MO
    Posts
    5,791
    Were they all 190 cfm? If so...have you tried it with the intake bolted on them?

    Chris

  5. #155
    Join Date
    Aug 2004
    Posts
    203
    they all flowed with in 4-6 cfm of each other. and no i did not Flow them with a Lower bolted on.

  6. #156
    Join Date
    Sep 2002
    Location
    Effingham.IL
    Posts
    5,011
    After well over two years of work I have a modification to
    greatly enhance are stock manifolds linear flow into the heads.
    This is the problem Dave is now seeing.

    Will post some pictures and info very soon. Right after the
    completion of upcoming SC/XR7 2006 Shootout.

    Dave D. Thanks for your help in testing the raised manifold .
    and the numbers in your last few posts.

    Randy
    Last edited by Randy N Connie; 07-24-2006 at 03:02 PM.

  7. #157
    Join Date
    Sep 2002
    Posts
    4,849
    Has anyone looked at making an intake thats like the one found on the mark 8I was trying to draw it in cad but I was haveing some problems with my program. I will try again.

  8. #158
    Join Date
    Jun 2002
    Location
    Milford, Michigan
    Posts
    1,398
    [QUOTE=DamonSlowpokeBaumann]The shortcommings of a design such as that (short runner large plenum) is loss of low and mid range power. And has been said..Ok for a race engine in which you stay at higher RPM's...Not so great on a street car where you spend alot of time at mid and low RPM's

    The 4.2 NA upper and lower intake manifold like you see in the later Aerostar vans have a cool crossover intake manifold very similar to the BBK 5.0 intake. Those runners are pretty long. That would probably make a good manifold if one were to run a turbo or a centrifigal blower. If you do the calculations, my runners are still too short for optimal low end on a N/A motor but I figured I was getting a much longer runner than the SC intake.

  9. #159
    Join Date
    Oct 2003
    Location
    Albuquerque, NM
    Posts
    1,609
    So I was reading through this and was curious if any solutions for the "turbulence" were ever found? Or was it just decided that for the majority of people it makes more sense to leave the intake alone, unported(gasket-matched) even.

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