Thread: head porting
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Old 04-16-2016, 01:29 PM   #1
Tycollins37
 
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Name: Tycollins37
Title: Tycollins37
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head porting
I'm working on a 12 valve head doing some port and polish work considering putting in groves like riflings in to help with swirl. Has anyone done this and seen any gains?
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