For the W5 lovers

Dan, stop reading magazines and the internet. Guys have been running 2.02 valves on 318’s since before I started doing this stuff.
Ding ding ding….. agreed! Likewise! Here here!
A 170 CC runner is SMALL for 318 inches.
Even stock. But that’s nether here or there. Once you build a simple street performance engine, all stock dimensions are out the window. While a stock head can work & probably pretty OK, alter the head (porting) and more power comes in. You can go pretty far with a stock cylinder head and not loose any low end power or throttle response.



And you can’t compare the runner volume of a GM head to a Chrysler or Ford head.

Each head should be compared and analyzed for its own drawbacks and attributes for the job and engine it sits on to be used for the job expected at hand.