Half Cut



Bench Flow Test

Head Volume (cc's) = 46cc's

 

I'm assuming the flow bench test on the bottom is stock flow rate... Is this correct?

 

Yeah, the top one had a Flow Bench error, so I need to remove it


Edited***

 

Stickied!
I need this info for some before and after flow bench results on the head work I am about to do.
You can tell that flow can be a little better with the KA head at 99.3 CFM/ per .100" of lift it should have a CFM closer to 98~100CFM. Exhaust seems to be small diameter sizes for smog and scavaging reasons.
I would bet that very little head work needs to be done to the KA and it would have to do more with the valve diameter. I bet just a .040 diameter increase on intake and exhaust would make those CFM numbers go way up!

 

Would it be smart to do a minor port and polish job and over size Int. valves .5mm over and exhaust .7mm over? or would that just not make sense, I figured this since the exhaust size doesn't flow so well.

Seems like 10mm of lift is optimal

 

Just minor port, extrude, and polish you don't want to ruin the overall velocity of the runners. I think that improving the valve diameters would be much more critical.
I don't see why you wouldn't just do a .5mm all around, and enlarge the runners on the exhaust a tad more.

 

OK makes sense

added some more head info