Ported 425 heads flow #s

Discussion in ''Da Nailhead' started by snake, Apr 23, 2013.

  1. 66gsconv

    66gsconv nailhead apprentice

    Snake this is a good flow number coparision thread hope you don't mind. I just wanted you to know how good you really did on them heads:TU: I have a practice head and worked off and on for 1.5 years and tested it more than 80 times for every little thing I did. I would love to get the mid lift numbers that you got.
    lift intake exh.
    .100 73.4 70
    .200 135.3 92
    .300 183 116
    .400 216 131
    .500 233 140
    .600 243 145
    .700 252 147
    This is with a 1.94 and 1.50 valve sizes. I have a hard time transfering the exact shape to the heads I am going back to work on. Good thread:gp:

    p.s. Just wanted to say that with that much air with the 1.88 valve your coe. discharge will be great. In other words it should really run strong with gobs of TQ.
     
    Last edited: Aug 22, 2013
  2. snake

    snake Well-Known Member

    Thanks Bob, I found out more about the flow bench superflow 600 the Manometer reads up to 90 percent and if it is wanting to go over that you need to go up on the next range, so that's how he established range And his first run numbers were void not sure why but these have got to be the best heads I have worked on, They are better than the cam it still Im not going to over cam but I will have it Dynoed by SMI Shawn Murphy Induction so the big 1972 800 cfm q-jet and q- jet manifold that has been dual plane mod and ported can be tweeked to run its best. Looking to crack 400 HP if possible!:Brow:
     
  3. 66gsconv

    66gsconv nailhead apprentice

    Snake , I am thinking you crack the 400/500 hp and tq numbers. With them heads and dp q-jet this should be interesting.How long till your ready?
     
  4. snake

    snake Well-Known Member

    Well should I take the engine over to Dyno or put alltogether in the car then go to the dyno, Isnt rear wheel Hp/trq is what Im looking for, Right?
     
  5. 66gsconv

    66gsconv nailhead apprentice

    Engine dyno if possible. If something happens its not in the car yet and they can tune better. Also hp and tq are at the crank, no guessing
     

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