Test test test

273 said
I think that's a little unfair, don't think anyone knocking your work just I think It's natural to assume the chamber shouldn't be bigger than the bore, even though that's probably only based on assumptions without any empirical evidence, I sure someone out there had dyno/track test the **** out this but most of us not privy to this info, so when someone does exceed assumptions it might bring up some questions.

From what I remember your testing on a 4.03" bore so if your gaining 20+ cfm by going larger than bore especially if you found it's the only way to gain this then the results speak for themselves, cause it's fair to assume that gain will also apply to the dyno and track. I imagine there would be some more gains on larger bores. Have you ever tested them on larger bores ?

My biggest gripe is if you know so much start a post and “teach us”. But no they don’t do that. They would rather come on someone’s post that is trying to teach a few findings and spin their story. I don’t know if this guy runs 11’s or really knows something and runs 8’s. If you are talking about an Indy head or some other head then in your post I would know this. Every small block head I test is on a 4.015 cylinder size flow adapter and sealed with a 4.180 (1008 felpro gasket). So if the flowbench findings isn’t enough you know what my car runs. These heads have been on 3 (4.030) and 1 (4.040) engines that have run 9.30’s-10.30’s on a 2850 car and 3200 pound car. So flowbench numbers backed up by track numbers. 4.180 chamber on these bores. When the valves clears the deck surface it has 4.030 inches of area to flow into. A properly ported head has air directed towards the center of the cylinder NOT the cylinder wall. This takes effort and is why we get rich porting heads. If the chamber is crowded in on the valve, especially with the sucky azz small block chamber if you don’t give it room suffers from .100-1.00 every time the valve opens and closes. After todays flow numbers I’m done teaching for awhile because I’m tired of explaining things over and over. Step up guys, teach us.