Has anyone tried porting and polishing the heads? Also, has anyone tried the Nismo VQ35 46cc heads? These heads do raise the compression ratio but I don't know how much.

 

Someone at performance nissan has portpolished heads, Jason maybe.

I'm thinking of doing it next year, along with cams, valves and springs

takes a P&P wizard to do it right though... someone who has done this for better part of his life for serious applications. I wouldn't thrust anyone else

 

Some of the guys who just got their built motors up and running are seeing restrictions with the stock heads and cams past 500-520 hp....even when adding more boost. In these situations the port and polish with cams will get the engines closer to the 600hp level I think.

 

My expectation is that just adding JWT S1 cams (or similar) "alone" can net > 40rwhp beyond the levels being seen with stock heads and Cams at the same higher boost levels.

 

I would doubt it...Although I have no experience with those cams: NOTHING makes that much power on our cars...


never mind, just read the boost leve things = youre turbo = things CAN make crazy power.