dude_4_sale Posted January 17, 2008 Share Posted January 17, 2008 just wondering if anyone has port and polished the 2.2 heads? what kinda hp gain have u gotten? very noticeable or what? Quote Link to comment Share on other sites More sharing options...
idosubaru Posted January 17, 2008 Share Posted January 17, 2008 someone on here has probably done it but i can't think of ever seeing anyone comment on it. if you don't get any feedback here hit up NASIOC, those guys do all sorts of EJ engine mods and document stuff like that over there. might even be able to find some off-the-shelf ported and polished EJ22 heads from a company - if they dyno'ed them it may give you and indication of what's possible. it comes down to how it's done too. a good job can make a huge difference, a bad job can make things worse. the best heads are flow tested and make significant changes. for the do-it-yourselfer you're limited to just smoothing out the casting flash and port matching the gaskets. anything more could actually loose you power. Quote Link to comment Share on other sites More sharing options...
OB99W Posted January 17, 2008 Share Posted January 17, 2008 just wondering if anyone has port and polished the 2.2 heads? what kinda hp gain have u gotten? very noticeable or what?I've never done it, and don't know anyone who has. Gary's suggestion to check at NASIOC is a good one. However, in general, "modern" engines are made to much closer tolerance/fit than years ago, since manufacturers are trying to eek out the best performance and gas mileage they can. Therefore, the gains to be had are likely to be much less than possible in the past. As Gary also pointed out, it's just as easy to make things worse as make them better. In addition, the ECU will attempt to compensate for changes, to some degree possibly nullifying them. Quote Link to comment Share on other sites More sharing options...
porcupine73 Posted January 18, 2008 Share Posted January 18, 2008 Not sure i've seen it for a soob. My boss builds his own race cars and he built his own flow bench to check peformance as he ports and polishes his cars' intakes/heads. He offered to do it for my soobs for $120/hr....hehe....i said thanks but...... Quote Link to comment Share on other sites More sharing options...
woundedbrat Posted January 18, 2008 Share Posted January 18, 2008 What about shaving the heads down a .001 or .002 increase compression a little . would probably make a non interference engine into a interference one but what about belt tension would it be effected by the change anyone tried it? Quote Link to comment Share on other sites More sharing options...
idosubaru Posted January 18, 2008 Share Posted January 18, 2008 would probably make a non interference engine into a interference one if it's a 1997 EJ22 or later then it's already interference. Quote Link to comment Share on other sites More sharing options...
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