TwinTurbo.NET: Nissan 300ZX forum - regarding JWT HD spring install
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Subject regarding JWT HD spring install
     
Posted by wickdGSXR on July 21, 2014 at 1:04 PM
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Message I only found one search regarding JWT 500+ cams which require heavy duty springs.

From Ben at JWT:
install height of 35mm which is 71 lbs of pressure.
Install champfered end up!

According to Greg Dupree at SZ, this should prevent valve float on 500+ cams up to 8000 rpm.

     
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