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  1. #1

    Join Date
    Oct 2013
    West Central Florida

    Milling Stock Head

    Does anyone know how much a stock 66V cylinder head can be milled and still run 93 pump gas? How much milling equals what compression PSI?

  2. #2
    Almost's Avatar
    Join Date
    May 2010
    Cape May, NJ
    I don't think it is as easy as just taking some metal off, I think the domes need to be reshaped as well. Get a hold of Jim's Performance on here and have him do it, its like 100 bucks. He is located in the palm harbor area I believe.

  3. #3

    Join Date
    Aug 2006
    Its around .050 or so, but you do have to recut the squish bands so it is well worth sending it to someone who knows how to do it. A knowledgeable machinist also knows a better squish angle versus the stock one which really is not the best.
    You can run up to around 145-150 psi on 93 octane fuel, I have several boats in the family that run that compression and use 93 oct.

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