Reply to thread

Message: <blockquote data-quote="glittle75" data-source="post: 528241" data-attributes="member: 8675">the "Emissions vane" is the little "shroud" over the valve in the chambers. most people shave it off when they port heads to unshroud the valve and improve flow a bit, you uncover the curtain area more when you take it out. It actually a "Swirl Dam" to help get the fuel and air mixed in there good to lower emissions and improve power by getting more of a full burn of everything. but it also shrouds the valve up a bit. and to the OP, i say if you can find a good PI motor for a decent price, go for the whole thing. if you look around for a bit and come up with nothing, Do the PI Swap. If you do grind down the dam, your compression should be in check for the boost. and if your just going to throw stock PI cams in there, just throw them in straight up and you'll be fine. degree'ing them stock cams aint gonna do much for ya. but if you get anything above a "Stage 1" degree them. my $.02</blockquote>