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Thread: Valve lash setting on a unknown cam

  1. #1
    Junior Member APPRENTICE
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    Valve lash setting on a unknown cam

    Got a car that has a solid lift custom grind Nitrous cam,tried to find out what the valve lash was supposed to be but i have not had any luck with previous owner,so any suggestions on how i should set them?No cam card of course,on nitrous cams are the valve lash tighter?I know i can pull the cam,but dont really want to do that untill the winter.I did check them just to see kinda where they are now and they range from .002-.008-.010 and in between.

  2. #2
    Senior Member DYNO OPERATOR
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    My nitrous cam is setup tighter lash on the exhast side they are.019ex, .030,int. I believe.David,

  3. #3
    Senior Member RACING JUNKIE
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    .002?
    Wow that's WAYYYY to tight!
    Loosen that puppy up!
    I'd put them all on a even .022 cold just to be on the safe side but thats JMO and I'm sure someone will disagree> if you insist on having split lashes put the intake on .022 and the exhuast on .028.

    Goodluck, Charles
    ***IN GOD WE TRUST***

  4. #4
    Senior Member RACING JUNKIE
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    Yep- I am w/ Cepx... I have talked about this some on this forum on a different thread... it was 3 or 4 pages long... but no one had anything like .19/.30... that's tighter than a Catholic girl on prom night!! Mine is .26/.26 on a BBC w/o nitrous... but I am certainly no expert on this.

  5. #5
    Senior Member RACING JUNKIE jmarksdragster's Avatar
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    Did you check them with the engine hot? Makes a difference. Cold the lash may be on the tight side.
    Mark Whitener
    http://racingfuelsystems.myfunforum.org
    __________

    Good work isn't cheap, and cheap work can't be good.

  6. #6
    Senior Member MASTER BUILDER
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    some cams call fortighter lashes depending on the lift and duration. I always found .022-.024 a good starting point.
    too loose may cause a problem,
    my 2c

  7. #7
    Senior Member EXPERT BUILDER
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    My Howards Cam is 25/25 I set them cold and forget about them.
    I have not tried to find any power there...

  8. #8
    Senior Member RACING JUNKIE
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    I got a bullit that's .590/.595 lift and it calls for .026,.028 hot, i was told by bullit i could go as low as .018,.020 but not any lower. I spent close to $800.00 and went to a .626 roller and picked up a whole .005 in the 1/8, it wasn't my idea of fun.

    JMO

    Zip.

  9. #9
    Junior Member APPRENTICE
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    thanks for all the help and info..


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