Valve spring pressures?

Discussion in 'PSI Superchargers Tech Questions' started by darmstrong, Jun 19, 2007.

  1. darmstrong

    darmstrong New Member

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    Should you run a heavier valve spring pressure on the exhaust valve or the intake?
    The exhaust valve is getting chased home by the piston, so maybe heavier spring on exhaust?
    What spring pressure should we run on mild blown alcohol Hemi?
    Cam is only 700 lift at valve
    Thanks
    Dave
     
    #1
    darmstrong, Jun 19, 2007
  2. Mike Canter

    Mike Canter Top Dragster
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    The heavier springs should be on the intake side because they are fighting the blower boost in closing. A lot of racers rotate the springs by putting new springs on the intakes and taking the worn intake springs and putting them on the exhaust and thrwoing out the old exhaust. This saves one a little money.
     
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    Mike Canter, Jun 19, 2007
  3. rpmhiperf

    rpmhiperf Blown Alcohol

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    Plus the intake valve is larger and usually heavier than the exhaust valve. :D
     
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    rpmhiperf, Jun 19, 2007
  4. darmstrong

    darmstrong New Member

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    That makes perfect sense. Thanks :)
     
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    darmstrong, Jun 19, 2007

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