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milling vtec head for more compression.

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    #1

    milling vtec head for more compression.

    I have a poa-2, vtec head that's going on my f22a block and i need to know how much i can mill off of it, I'm trying to raise the compression and i don't want to take to much off. It has the stock cam in it its a sohc, but i am eventually gonna put a bisi stage 1 or stage 2 in vtec cam in it. I will appreciate any and all the help i can get, thanx... and the block is all stock.
    Tags: None
    #2
    are you putting aftermarket parts into the block? why not just buy high compression pistons? if the cylinder head is perfectly flat then you shouldn't need to get the head milled. imo

    who is doing the machine work for you?

    you can use this site to calculate compression. http://www.zealautowerks.com/
    www.stl-imports.com

    Referral: crx08

    support the import community

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      #3
      Originally posted by crx08 View Post
      are you putting aftermarket parts into the block? why not just buy high compression pistons? if the cylinder head is perfectly flat then you shouldn't need to get the head milled. imo

      who is doing the machine work for you?

      you can use this site to calculate compression. http://www.zealautowerks.com/
      I dont know how far you can mill a honda head but I know milling a head is cheaper than new pistons and a bore job. You wont get as much of a bump in compression as domed pistons but its a lot cheaper.

      Nick

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        #4
        yeah but if he mills off too much material now and then warps his head later, it's trashed. Id do it the right way and save up a little more for the proper pistons.

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          #5
          not only that but when you mill to much off then the timings belt starts becoming to big and you must get shorter ones b/c the tensioner cannot get tight enough
          ''COUPE''




          ''WAGON''

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            #6
            Milling the head causes problems.

            The valve timing is off. The timing belt is loose. The valves can get dangerously close to the pistons (float a valve, and your motor is done.) Furthermore, if you overheat and warp the head, you won't be able to remove any additional material to make it straight again. Your head will be garbage at that point.

            If you want higher compression, replace the pistons. If that's too much money or effort for you, then find something else to do.






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