Posted by rickyracer (IP: 209.20.173.80) on November 29, 1999 at 23:48:24:
In Reply to: Porting Heads posted by Mavman on November 29, 1999 at 06:07:29:
:they're for exhaust air pump ports and you can grind them down to the regular port shape, open your exhaust ports to match the gasket.
and remove sharp edges below the valves
I picked up my spare set of 289 heads. Looking for more info on porting these things. Anyone have any info on the nipples that stick up on the exhaust side? I thought I read somewhere that they are necessary to an extent. I read an article within the past year regarding porting and polishing, but don't remember where I saw it.
: I appreciate all the info so far, and would appreciate any more help given.
: PS: Near the end of the month so I'll probably repost this in the new board.