| Re: How much HP gain with ported plenum and runners??? |
Subject: Re: How much HP gain with ported plenum and runners??? by Matatk on 2009/8/1 13:34:49 People say around 10-15 depending on mods. I have no personal experience on the dyno with those mods, though. I've got my plenum sitting in the garage about 30% ported (I'm lazy!) along with my new SLP runners and a stock intake to be ported. When I get around to it is what I keep saying. Just a quick question - did you make sure that you got an 89 specific plenum from corvetteplenums? Mike should have asked for your year, because the 89 is a one year only plenum. Just FYI. Matthew |
