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porting and polishing

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xharlequinx

15+ Year Contributor
64
0
Jan 8, 2007
burlingame, California
I know porting intake manifolds and all that is "good" for airflow improvement, but exactly how much of a gain will u get by porting and polishing manifolds?
please n eone let me know from personal experiences, because I just bought a rotary dremel and I'm about to get started on a project manifold.
 
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It depends on how well it was done, size of the turbo, psi you are running etc. Take your time and make sure you do it correctly.
 
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