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PC/SR · 01-09-2022, 12:47 PM

Yes, but then the carb and intake become restrictions, and of course then you need a bigger cam, and after that.....Do not know you goal, but IMHO just porting and valves are not worth the performance increase without the other stuff. For a quick and easy HP increase, get a HC head, or downdraft carb.

01-09-2022, 12:47 PM	#3
PC/SR Senior Member Join Date: May 2010 Location: Santa Rosa, CA Posts: 1,285	Re: Big Valves and porting? Yes, but then the carb and intake become restrictions, and of course then you need a bigger cam, and after that.....Do not know you goal, but IMHO just porting and valves are not worth the performance increase without the other stuff. For a quick and easy HP increase, get a HC head, or downdraft carb.