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Thread: piston 2 valve q&a

  1. #1

    piston 2 valve q&a

    is it unusual to have the center of the valve different between the heads and pistons when you have aftermarket heads and pistons? i notched my pisotns for more lift today and hte exhaust valve is either offset on the pistons or the factory notched the pistons for a big block exhaust vavle and not a small block.

  2. #2
    Senior Member DYNO TECH
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    What heads do you have?
    'A government big enough to give you everything you want, is big enough to take away everything you have.'

    Thomas Jefferson


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  3. #3
    Senior Member DYNO OPERATOR
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    Will agree.
    Now there are a lot of aftermarket heads with slightly relocated valves and valve angles.

    Ed
    " Let all things that hath breath, praise the Lord. Praise Ye the Lord" Psalms 150 vs 6.

  4. #4
    Senior Member RACING JUNKIE
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    Re: piston 2 valve q&a

    Quote Originally Posted by Timmyboy86
    is it unusual to have the center of the valve different between the heads and pistons when you have aftermarket heads and pistons? i notched my pisotns for more lift today and hte exhaust valve is either offset on the pistons or the factory notched the pistons for a big block exhaust vavle and not a small block.
    Sounds to me like you recieved a set of pistons for an 18* of a sb.2 head, if you have a set of 23* heads and the pistons are clearanced for the valves they should take up too 1.625 valves easy, even for .700 lift unless the heads have been angle milled.

    Now don't get pissed at me but a couple yrs. ago someone ask me to look at an assembled engine that all the exhaust valves was hitting the pistons. It turned out that they had not brought the piston up to #1 TDC and had installed the cam gear 4* advanced (3 notch crank gear)and lined up the cam gear to that location. Could this have happed to you by accident?

    Zip.

  5. Racing Junk


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