And how do you know what ideal velocity is?

I'm just saying, your theoretical engines will barely crack 600hp and 14 Apaches 600s make 1000, naturally aspirated.

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.

With using simple mis used terms, a raised runner 320cc head will be smaller than a 320 standard runner head. :) LOL.

Only made 960hp 10to1 lol

What ever happened with the spread ports?

Lol sitting on the bench in my shop. Just did some motors for someone else have not hade time for my own stuff. Plus just bought a superflow 902 I have to pick up soon. All my stuff is ready to assemble just have to wash it. How about your build?

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.

The motors that are going to twin turbo do you have #6 drives on that boat? You have axes to a flow bench to play with for your head porting? Like me to many projects.

No #6's they just slow the boat down. Plus it's a Fountain it will sink if I hang 6's off the back... I have spare drives.

Yeah friend of mine has a flow bench at his house and builds some nice heads. So I do have some adult supervision.

Sounds like a cool thing I know the bare castings un ported are not that bad. You going spread port. If I had it all to do from scratch I would build complete turbo set up small spread port heads. With the x-block lifter layout.

Staying conventional considering I had a billet intake made for the 632.

Think you hate money more than me. How much was the intake and is it two piece? LOL
Post a picture.

It was only $3,500 has billet runners fabricated top. I just wasn't sure with the hardware I had it would crack 1,000hp on pump gas. I figured it would be close. So, when in doubt spend more money. I know it will crack 1,000 now. Now all my buddies I boat with are getting rid of there fast singles and buying gay center consoles with egg beaters. WTF! That has a lot to do with why the motor hasn't gone together yet. Who am I gonna beat up on now?

LOL I have done that before myself times change. Now its two of everything. I should of kept my old heads and bought some 980 superchargers and bin done. Live and learn

Or use pair of 454 mags put a pair of Borg Warners on top and made 1100hp for no money...

Only trick to doing turbos right is a watercooled manifold. Which is no small task.

Turbo's.

Or send the inconel headers to a place in Florida that does the offshore diesel fishing boats and have them wraped with the ceramic.

Or just do what all the other Marine turbo engine builders do and throw a water blanket over the turbine housing and call it done.

Here's another interesting read on 598cid marine engines from 2016