TwinTurbo.NET: Nissan 300ZX forum - Mating old style heads to new style lower plenum.
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Subject Mating old style heads to new style lower plenum.
     
Posted by Pearl_TTZ on December 28, 2017 at 4:57 AM
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Message Hi,

My 1992 TT was hydrolocked my the first owner in 1997. Nissan dealer fixed the car and it looks like for one reason or another I have old style 40P heads mated to what looks like a new style lower plenum. Now, everything sits fine and I had absolutely no boost leaks using old style gaskets.

My main question is if it ok to mate older heads and newer lower plenum? Since port shapes are a bit different, would there be any issues that cannot be fixed with port matching? Would there be any negative effect on injector spray pattern?

Thank you.

     
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