228r 243 head milling
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228r 243 head milling About too pull the trigger on the stage 1 porting of my 243 heads, kooks longtubes and a 228R on a 114. Just wondering how much to mill off the heads. The car is a 2005 ctsv peak hp is not the goal a good daily driver is. The stock chambers are 64cc i believe. Would it hurt to do 63cc?
I would definitely mill them if you're considering it, but only milling to drop 1 cc is a waste of time and money.
I'd go down to 58 cc if possible without valve clearance issues, or at least down to 60 cc
Ask the cam manufacturer to be sure but a 228 cam should have plenty of clearance even with milled heads. And as always measure and make sure once you get it together. You could do the cam and measure and see exactly how far you can mill, then mill.
I'd go down to 58 cc if possible without valve clearance issues, or at least down to 60 cc
Ask the cam manufacturer to be sure but a 228 cam should have plenty of clearance even with milled heads. And as always measure and make sure once you get it together. You could do the cam and measure and see exactly how far you can mill, then mill.
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Joined: Dec 2017
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From: San Antonio
I'm running a similar cam (224/228-114) with .600 lift. I milled my 317 heads .030, and don't have any clearance issues. The .030 made the chambers 6cc smaller. With 243 heads (about 65cc), I would mill them about .015-.020. That should put the chambers at 62-60cc. For an LS1, that would put the compression around 10.8-11.0. What engine are you working with?
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About too pull the trigger on the stage 1 porting of my 243 heads, kooks longtubes and a 228R on a 114. Just wondering how much to mill off the heads. The car is a 2005 ctsv peak hp is not the goal a good daily driver is. The stock chambers are 64cc i believe. Would it hurt to do 63cc?
Lonnie
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