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  1. #1
    lownrangr's Avatar
    Join Date
    Oct 2008
    SE Michigan

    your opinions: 180 psi or 200 psi?

    How much of a difference will running these heads be on a 96 xp? I have the 180 on now, but also have a 200 sitting here. Will it be worth it to swap them out for racing this weekend? What are YOUR thoughts? Thanks.

  2. #2
    A smart admits!A wicked excuses!An idiot insists! mitsakosgt's Avatar
    Join Date
    Jun 2008
    180 psi,I had problems using 200 psi head on the past,180 is safe and good to go!
    What fuel are you running?

  3. #3
    maxadrenaline's Avatar
    Join Date
    Nov 2007
    Theodore, Alabama (Home) Shelbyville, KY (Work)
    I would run the 200 for better holeshot if your pump/prop can handle it without cavitation. We ran 210psi domes consistently with 109 octane @ 7500rpms no problem.

  4. #4
    carefull with base gaskets. 787 we built with over 180 we kept blowing base gaskets, also starter doesn't like it very much either.

  5. #5
    lownrangr's Avatar
    Join Date
    Oct 2008
    SE Michigan
    i'm just going to run the current 180 setup. I ran out of time to test out the 200 psi head. I'm running 93 octane btw. I woulda like to have made this thing get up and go for this weekend though!

  6. #6
    some case cleanup and cylinder porting will net you better results than higher compression. or will net you good results with the same 180 psi cranking compression.

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