598 Engine Advise
#42
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You need to know the cubic inch of the motor and how much rpm it is going to spin. Based on the air demand of the bottom end you can calculate what air speed the motor wants. It's simple height x width. The port volume really doesn't mean anything. Example a Brodix bb3 332 head has roughly the same air speed in the port as an AFR 315. The Dart 345 head actually has more csa than an AFR 357 the AFR head actually has more air speed and would theoretically work on a smaller motor than the Dart 345. But yet the AFR has 12cc more volume. Advertising cylinder heads based off of Volume and CFM is a great way to market a head to the masses but is a poor way to design and build an engine.
Last edited by Black Baja; 11-02-2016 at 03:57 PM.
#43
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With using simple mis used terms, a raised runner 320cc head will be smaller than a 320 standard runner head. LOL.
#47
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Everything is machined cleaned and ready to go together. I'm still boating on my Fountain. Probably going to run it tomorrow for the last time. Motors will come out and I'm going to build a pair of short deck 572's if money permits I'm going to put twin turbos on them. I don't have a hull to stick the 632 in yet so I'm a little reluctant to put it together. Plus I really want to start doing my own cylinder heads. I'm thinking about buying a set of castings and porting them myself.