TwinTurbo.NET: Nissan 300ZX forum - First time ever porting cylinder heads for my friends 300zx
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Subject First time ever porting cylinder heads for my friends 300zx
     
Posted by EVLTWINZ on October 04, 2017 at 2:17 AM
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Message The intake runners are 80 grit and the exhaust runners are smoothed to 280 grit and polished. Just in one cylinder head I have about 7 hours total into it. I will be doing a set for my Z which are 48p heads. Those heads will have way more time spent into the exhaust runners then these 40P heads.

     
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