I found this searching for head porting info...if you go to this page ( http://www.airflowdesign.com/ ) and scroll down a bit, there are a bunch of pics and some text, but here's the best pic: http://www.airflowdesign.com/i...4.jpg

My only real problem with this is that it should cost like $100, IMO, since it's a aquare steel post, four straight runners, some flanges and end caps...could be really useful for an incredibly tight-quarters custom install.

I'm thinking it would have potentially very fast spool-up, but poor top-end flow.

 

I mean, it really looks like an even more basic log-style manifold... How about you make it, test it, and then let us know how it performs

 

That flange shown on that manifold is for a Toyota 3TC/2TC Engine, its an older engine and ive made custom headers for them before, Those engines are extremely strong even for there age (there from the early 80's), we are pushing 575whp out of one, there a 1.8L 8-valve engine.

Anyways the design itself isnt to hot, the completely square collector will cause a lot of turbulance.

 

horrible design. The idea behind a plenum is to store air for the next intake charge, it is ocmpletely useless on the exhaust side and does nothing but inhibit air flow.

 

turbulence nightmare

 

this looks like my FIRST manifold I built when I turned 17. I did it purely out of aluminized exhaust tubing. Lasted about a week before it drooped and lost the turbo. Ran a 9.0@83mph(1/8) in my old B18B ek coupe.

 

Heh, I'm just hoping it's that design because there is basically no room in whatever car it is for...the older Toyota engines are workhorses, too. I'm building a 77 Celica, supercharged, right now, and was initially thinking 5psi, but after doing some reading, 15psi seems to be more suited for it