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.

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

Whats the name of it?

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

the thing that concerns me the most is the seals that would be required on the shaft that goes through the flange.

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

wouldnt those be the same as an internally gated turbo

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

no, those dont see compressor drive pressure.

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

Fixed* :1

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

if the hole for the shaft running through the flange are precise enough, the shaft would plug the hole good enough.. or at least I would think

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

You sound retarded.... Just so you know

Sound Performance made them, and they're calling it a quick spool valve

http://www.spracingonline.com/store/...ool_Valve/3643

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

is this thing supposed to go pre turbo and open after X amount of psi giving you even more pressure to the turbo exhaust housing.

its just not a good description of how it works and what its supposed to do. all it looks like to me is an internal wastegate.

please someone clarify

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

It diverts exhaust flow to the one side of the divided housing, giving quicker spool but less headroom. At a set psi the other half opens up giving more headroom, at a cost of low rpm pressure. Seems to me like it wouldn't work with a splog...

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

weiRtech you should make a few of these :y

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

i don't think the demand is there for them. i couldn't see selling more than 10 of these things. even fewer at $700 a pop. :8

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

I want to make something like this for my twin scroll GT3271 this summer. I would probably build it a bit different though. And holy ---- are those people proud of those things. Cost more than my turbo did. :1

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

got an idea, anyone know what throtle plates outta stock honda TB are make out of?

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

aluminum.

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

the throttle plates are most def not aluminum. i think they are a hardened brass or something. some aftermarket tb's use stainless plates.

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

I thought honda tb plates were made of tenzo aluminum 713 I believe.

But on a seperate thought can the exhaust housings be made of some kind of brass like C922 or C876 or something.
B/C I can try to get some made at the foundry I work at. I know most of the brasses we melt require at least 1900 deg F.

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

I dont think brass would be a good idea, the melting temp is too close to exhaust gas temperatures. Also, not a good idea due to the thermal expansion characteristics of brass.

M 2c

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

good idea but i think you could spend your $700 a little better, might make one over winter break

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

ive been thinking of doing somthing like this but using the same basic design as a diesel exhaust brake trimmed to fit.

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

weiRtech I may try to make one, how much would a t3 twin scrol flange in 1/2" be ship to 07504?

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

man there's A LOT of interest for this valve... looking forward to seeing the first HMT version.

But how the heck do you keep the exh. gas from leaking where the shaft goes through the flange?

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

you don't you watch for expansion tolerances. The holes for the shaft are at least 1/2" long so you could put a bushing at outer ends of each hole.

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

why would you use a bushing? i would be worried about the difference of expanision between the two metals and have one through hole for the shaft and the other just 1/4 of an inch into the other wall thickness and use a mild steel rod with a mild steel flange

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

I agree. As long as your hole and shaft are pretty true and your clearance is low you should be good.

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

brass wont work O0

and its not a big deal on a little leak stock internal WG dont have a seal just close tolerance but then again some one is gonna say its after the turbo but it just dont matter just a little leak wont hurt .. some one make one with a piston ring around it just like the turbine shaft has

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

Sweet idea, but I wouldn't trust those two little screws/bolts that hold the flapper onto the shaft. If they come loose or break, they will ---- up the turbo.

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

wat

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

i think those are little spot welds

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

Took the words out of my mouth......

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

Here is what someone on my maxima forum decided to do. Its still in the works but seems to working so far with few small bugs to work out.
http://forums.maxima.org/supercharge...ld-thread.html