ported plenum and siamesed runners
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Joined: Jan 2002
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From: Yardville, New Jersey
ported plenum and siamesed runners
i was thinking about getting a pair of siamesed runners and porting the plenum holes(where the air goes into the runners) to match the siamesed sideways "8" that they make... what performance gain am i look at? 87' 305 TPI
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Joined: Feb 2002
Posts: 15
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From: Cherry Hill, NJ
i personally think i gained anywhere between 15-20 horses..when i got the siamesed runners on there but when i got the edelbrock manifold..that's when i got my most from. my friend and i ported my plenum also...all i really noticed that it was pulling a little bit more in high end.
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