Milling heads
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Senior User
Joined: Aug 2016
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Milling heads
Hey all, with the potential of some internal engine work, it got me thinking about increasing some performance while I'm at it.
Has anyone milled their 2v PI head to raise the compression slightly? I haven't done the research to know the current compression.
I know it will have to be tuned but that is not a problem.
Just wondering if anyone has been down this path yet.
Has anyone milled their 2v PI head to raise the compression slightly? I haven't done the research to know the current compression.
I know it will have to be tuned but that is not a problem.
Just wondering if anyone has been down this path yet.
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
Likes: 421
From: Long Island USA
I don't think you'll get enough of a bump to even worry about a tune for it. If you're that deep into the engine, you might consider non-PI pistons that'll raise the compression a lot more.
Fleet Mechanic
Joined: Mar 2013
Posts: 1,576
Likes: 41
From: Wyoming
Milling for compression is a mistake though. On overhead cam motors milling causes timing issues unless thicker head gaskets are used, which defeats milling for compression.
Milling to fix issues can be done as long as the head still meets certain tolerances. One of which is adding a thicker head gasket to make up for loss of head thickness. Something I bet most remanufactured motors don't have.
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