11-26-2014, 06:54 PM
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#2 (permalink)
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A True Z Fanatic
Join Date: May 2013
Location: Columbus, OH
Posts: 5,051
Drives: 2013 Silver 370z
Rep Power: 3390
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Quote:
Originally Posted by avery370z
Has anybody done any porting and polishing or extrude honing of there heads?Mine are in the process of getting started just wondering if anybody saw some gains?
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They need it! Very rough and huge casting marks. When I installed my ported lower I could of ported at least a 1/16-1/8" more of the lower to match the heads. I believe in some nice gains as people have been doing it for years! While there off I'd do a 3 angle valve job and match the entire system. If you can pull the heads yourself it should be a very cheap power increase. I'd love to do it but the VVEL system scares the crap out of me.
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