TwinTurbo.NET: Nissan 300ZX forum - Did you use Ferrea Dual Valve Springs?
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Subject Did you use Ferrea Dual Valve Springs?
     
Posted by flashstar on August 11, 2015 at 1:11 AM
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In Reply To Re: Are you sure you didn't overtighten your tensioner? posted by MaxxAction on August 10, 2015 at 07:48 PM
     
Message Those do carry a much higher spring pressure. I've heard they run around 85 lbs vs 75 lbs for JWTs and 65 lbs on oem springs. Hopefully you didn't sustain much/any valve train damage!

     
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