Carmine
Old Man with a Hat
Higher altitude = less oxygen.
Yes. But.....Anything that helps the air change direction smoothly into the carb will increase flow.
My builder does a lot of hydroplane engines and has season champions and closed course record holders on his resume. Rules prohibit modifying the carb or any parts of it for airflow but nothing against adding parts. He ran every doodad available on his flow bench and so called velocity stacks actually reduced flow from just an open carb. The thing that actually picked it up was a plastic stub stack with the radiused inlet. When I say picked it up I mean less than 10 CFM but when you're chasing that last few horsepower it is significant.
The velocity stack reduced flow by about the same amount.
Kevin
Scott
A smallish huffer would certainly liven her up a bit. At any rate, she's a tasteful execution.
I think this one is very tasty as well...
Wonder if I could fit a supercharger under the hood of the Newport?
View attachment 218787
Yes. But.....
These stacks are on a Jimmy blower.
Everything you are talking about applies to NA engines.
I ain't buying it...Except the part about how air gets into the carb. It is still atmospheric pressure that pushes air thru the carb. Anything that can smooth its course will help the flow through it. The blower doesn't "suck" air contrary to popular belief. It just creates a low pressure area which atmospheric tries to equalize. Nature abhors a vacuum and all that.
Kevin