Question on port matching
Something to think about from a very sharp engine builder I wont name.
"I ported some heads for a 400" late model last year, the guy couldn't afford a new intake at the time & the intake he had was a shitty old holley strip dominator - not a great intake at the best of times & completely unsuited to the engine, so not worth spending any $$ to port it.
It was left alone with the intention of replacing it with a ported super victor when the coin was available.
I picked up something like 40cfm from those heads - & guess what, the motor picked up 60hp at the wheels without touching the intake.
The intake runners at the head face are a LOT smaller than the ports in the head, yet it still made considerably more power with the port work to the heads - much more power than a constant flow flow test to the intake would say was possible."
Maybe just maybe it gives the fuel that's on the walls and floor a chance to get re-entrained in the air column. He also mentioned a manifold murdering the intake flow on a head on the flow bench but not seeing a corresponding drop in power with the loss of airflow to what the engine actually made. In other words the murder in airflow didn't translate into a murder of the power the engine ultimately made.
Maybe go look at what Ethyl Corp found when they isolated the fuel that ended up on the intake runner walls and how that affected afr distribution. Considering pump gas uses a lot heavy end distillates that require a lot of heat to vaporize and they most likely will end up on the walls and floor.......