divided exhaust housing flapper valve.. quick spool down low, big power up top?
 

this would be such a good thing for the holset community, with a ton of sales involved..
I've thought about making one myself since I have an actuator and bracket laying around, but with school and work, and no welder, it's just not possible..

so I figured one of you guys might want to jump on it.. the only thing i'm expecting is the 2nd or 3rd one at a really low price.. maybe start a nog discount after that to support the site, and then branch out at full price to the dsm/subby/etc. guys out there..

it's a great concept.. single port open until 5psi or so, then the actuator pulls the lever and port #2 is exposed..

http://c1.ac-images.myspacecdn.com/i...36021fe428.jpg

Re: divided exhaust housing flapper valve.. quick spool down low, big power up top?
 

cool Idea how much for that and is that a T4 bolt pattern?

Re: divided exhaust housing flapper valve.. quick spool down low, big power up top?
 

Last time I checked, those bad bitches were goin for $600+...... :-X

Re: divided exhaust housing flapper valve.. quick spool down low, big power up top?
 

From memory the series 4 RX7 uses this type of setup standard.

Re: divided exhaust housing flapper valve.. quick spool down low, big power up top?
 

Excuse me if im ignorant.. but would this not effectively block off 2 runners on a properly made twin scroll manifold?

Re: divided exhaust housing flapper valve.. quick spool down low, big power up top?
 

yes, but you cant do paired cylinders with a setup like this, everything has to merge to a common collector

Re: divided exhaust housing flapper valve.. quick spool down low, big power up top?
 

The theory on this would be to use a divided exhaust housing, with a standard merge collector

Re: divided exhaust housing flapper valve.. quick spool down low, big power up top?
 

wouldnt this make your exhaust back pressure skyrocket?

Re: divided exhaust housing flapper valve.. quick spool down low, big power up top?
 

Thats what I was thinkin. It would work nicely if the flapper was built into the collector. Like, when it was closed, it would merge all flow to the one side. It could probably even be set to run an actual twin scroll merge collector. I think this is gonna be my next project in my design class. I like the idea.

Re: divided exhaust housing flapper valve.. quick spool down low, big power up t
 

it opens at a given psi, so lets say 3psi or 4psi.. a honda for instance, isn't going to even make enough horsepower to be affected by the back pressure enough to notice a change.. it's all about increasing spool time on a big turbo

i'm surprised no one here is jumping on this idea.