Ed Anderson wrote:

Hi Paul,
    Just doing some research when I came across this interesting topic.  It
appears (if I understand this correctly) that you can construct a virtual
adjustable length exhaust system by injecting water into the exhaust
headers.  Apparently injecting various amounts of water changes the density
of the gas mixture in the exhaust and therefore the speed at which the
exhaust pulse travels and therefore the timing of the pulse arrival at the
exhaust port.

  So hook this up.  fire up the engine and then adjust the amount of water
(density of exhaust gas) until you get a peak and - Vola! max hp with a
virtual tunable length exhaust system.

  For your interest material can be found at
http://www.factorydirectperformance.com/42591.pdf

Ed Anderson

 
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