boring cyl. block 150hp

Z

zindale

Seaman
Joined
Oct 2, 2004
Messages
57
am in the process of rebuilding the powerhead on my 89 150. going 20 over i have heard to chaffer the ports to keep rings from hanging. is what happened to cause overhaul. is this a good idea? also using wiseco forged pistons. will rings also break with these pistons vs stock?
 
M

moderator1

Lieutenant Commander
Joined
Dec 5, 2002
Messages
1,668
Re: boring cyl. block 150hp

The ports just need "Lightly touched" with crokus cloth, or if you know what you are doing you can use a dremel, but a big champfer can CAUSE the rings to break.<br />The ports feather just like a ring when worn, when you bore you are simulating the same condition. Just lightly touch them up...take the razor-sharp edge off, not much...in fact, you can't really see that you've done anything, but you can feel it.
 
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