Something to ponder about ported/tfs heads
 

Hey all,
Was just looking through some of McKinney's pics on his site of his ported heads and the tfs heads. I always thought, before looking at these pictures, that doing ported heads would gain you power just because of the added flow. But if you check out the link at the end of this post, you'll see what got me thinking. As I was looking at these pictures, I started thinking that the port job not only gets you added flow, but smooths out the ports. When I first looked at the unported heads, I thought how turbulent the air entering the engine must be as the walls of the intake ports are very rough. Ever since I looked at those pics last night, it makes me ponder how much could just the smoothing of the ports give rather than a total port? How much of a gain of a total port is from added flow and how much is added from less turbulence? How much restriction does the rough nature of the intake ports cause? Is the smoothing of the ports what gives the flow increase?

This is all just questioning just because it's something I'm sure not a whole lot of people tend to think about.*

Linky:
http://modularheadshop.com/Photos.htm

Discuss! Looking forward to learning more about this subject!

Teej

Well, D'uh.......SORRY...LOL

HOLY CRAP...i was just about to make a thread about this...cuz i started thinkin about portin the TFS's.

Where's nick when you need him!?!? lol I mean would you need a blower or some sort of F/I to take advantage of the flow??

Probably, or rev the thing to 9000rpm to take advantage of the design and flow. I mean with a blower above 6500rpm is where these will really shine, or above 7000rpm N/A. I'm just looking for some insight into whether its the added volume of the port or if its just the smoothing out of the ports that makes the difference.

I take it that a stage 1 is just smoothing and stage 2 is the addition of removal of a lot of material?

I'm starting to think these TFS heads aren't worth it unless you are building a nasty N/A car that you're looking to rev to 19,000rpms.

they'll be worth it on an FI car. I mean they flow like cobra heads. I bet if you put a mild blower cam in these heads with a supercharger they would allow our cars to act like cobras with the same general powerband and numbers. But when you put cams in cobras their powerband goes way up due to the amount of flow. So same goes with the TFS heads. Thats what makes sense to me anyways.

Yea i think the stage 1 is smoothing...from what i read...

And purpleice....SHAME ON YOU! lol

LOL I didn't mean it as an insult. I'd attribute it more to my lack of knowledge regarding the TFS heads.

Lol im kidding im kidding. Like teej said the intake capabilities of the TFS heads are nuts..and w/ a blower itd be INSANE! Thats why i didn't just port my stock PI heads.

Any input nick?