Quote:
Originally Posted by JET
Sounds like fun! Did you do any figuring of the helmholtz resonance when you extended the plenum on the Forrester?
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Actually there was a phenolic plenum spacer that Forrester made for the manifold a few years ago. He did all the testing. Think it made like 35whp more at same boost on a 35r with almost no low end loss etc. Mine just had the spacer cnc'd to exact same specs and welded on.
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