Dual compressor turbo

Half Crazed · 01-21-2013, 11:10 PM

** EDIT ** I mean turbine wheel (exhaust-side) instead of compressor wheel - where mentioned in pictures! Sorry! **

Take, for an example, two turbine wheel blades placed atop each other. The smaller turbines would have some sort of "blocking" intake from the secondary turbine, until a certain rpm is met where the smaller intake can no longer take the pressure and then overflow into the secondary turbine wheel.

The primary (small) turbine would also somewhat feed into the secondary (larger) turbine. Both are on the same solid shaft. Since this doesn't make much sense, I went ahead and drew a couple of awesome pictures.

Also, instead of drilled holes.. what about potentially having "high temp" pressure activated valves? Hmmm..

Since I'm not too much of an engineer, this was just thought up in my head and it seems like it would work (probably with some caveats).

Thoughts? Does something like this already exist? Is it mechanically possible to be more efficient if so, versus a twin turbo?

*update* The COMPRESSOR wheel could be single but slightly larger than usual because it would spin at great speeds throughout the band.. maybe even a dual compressor wheel!

Or am I retarded?

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TIGWERKS · 01-22-2013, 12:34 AM

Already present in the diesel world. I believe the new ford 6.7l uses a dual compressor wheel setup.

Half Crazed · 01-22-2013, 12:50 AM

Quote:

Originally Posted by TIGWERKS

Already present in the diesel world. I believe the new ford 6.7l uses a dual compressor wheel setup.

Damn! Like this? Does mine make sense? I wonder if it's the same. I couldn't find much of anything..

rocketperson7 · 01-22-2013, 01:03 AM

you didn't look very hard..

http://news.pickuptrucks.com/2009/08...el-engine.html

3MI Racing · 01-23-2013, 09:33 PM

That compressor looks so cool. When doing turbo testing, back when I was in the diesel powertrain world, I would just stair at that thing and think of the g-code

Yippy for CAD-CAM programs

wantsti · 01-23-2013, 09:57 PM

That's way cool

tja1618 · 01-24-2013, 09:15 AM

Quote:

Originally Posted by rocketperson7

you didn't look very hard..

http://news.pickuptrucks.com/2009/08...el-engine.html

That's a pretty interesting article. Thanks for the link.

Half Crazed · 01-24-2013, 08:43 PM

Sorry guys, I was completely opposite of my terminology!

I meant the turbine wheel - not COMPRESSOR wheel!

Sorry! Look at it again

rocketperson7 · 01-29-2013, 08:53 PM

yes, it's called

Holset VGT

or

Garrett VNT

Half Crazed · 01-29-2013, 09:00 PM

Oh nice, very cool.

VNT turbocharger cutaway animation - YouTube

drewvdw · 01-29-2013, 09:16 PM

I think I understand what you mean, like two separate exhaust turbines sharing the same shaft and outlet, just two separate inlets. Small, quick spooling turbine closest to the compressor, then a larger, high volume turbine on the opposite end.

Think of it like having a 1.5 scroll up pipe, except only one could get flow at a time (That would take a little engineering). The exhaust flows through the small turbine until a specified turbine RPM, then a solenoid or some sort of device switches exhaust flow to the second, larger turbine.

Interesting thought to ponder...

Half Crazed · 01-29-2013, 09:18 PM

Quote:

Originally Posted by drewvdw

I think I understand what you mean, like two separate exhaust turbines sharing the same shaft and outlet, just two separate inlets. Small, quick spooling turbine closest to the compressor, then a larger, high volume turbine on the opposite end.

Think of it like having a 1.5 scroll up pipe, except only one could get flow at a time (That would take a little engineering). The exhaust flows through the small turbine until a specified turbine RPM, then a solenoid or some sort of device switches exhaust flow to the second, larger turbine.

Interesting thought to ponder...

Yes - something like that.. but I don't see why the first couldn't feed the second. There's got to be some sort of maximum flow for the first wheel that would cause the rest of the exhaust to hit the next turbine as well!

This would (theoretically) cause instant spool and then also have boost in higher RPM's.. hmm

All-in-all, current turbos are old school... why don't we have anything that supersedes it yet?

BrioBriss · 01-30-2013, 04:57 PM

Wow that looks cool!

Matty_STi · 01-30-2013, 05:34 PM

Why not vgt plus dual turbines and compressors with rocket style antilag thrown in for good measure!!!

So much torque you could screw with the earths rotation!

Damn. I want 100 psi of boost at idle!!!!!!!! Lol

01-21-2013, 11:10 PM	#1
Half Crazed NASIOC Supporter Member#: 321842 Join Date: May 2012 Chapter/Region: South East Location: Bentonville, AR Vehicle: 2008 STi Blue	Dual compressor turbo EDIT I mean turbine wheel (exhaust-side) instead of compressor wheel - where mentioned in pictures! Sorry! ** Take, for an example, two turbine wheel blades placed atop each other. The smaller turbines would have some sort of "blocking" intake from the secondary turbine, until a certain rpm is met where the smaller intake can no longer take the pressure and then overflow into the secondary turbine wheel. The primary (small) turbine would also somewhat feed into the secondary (larger) turbine. Both are on the same solid shaft. Since this doesn't make much sense, I went ahead and drew a couple of awesome pictures. Also, instead of drilled holes.. what about potentially having "high temp" pressure activated valves? Hmmm.. Since I'm not too much of an engineer, this was just thought up in my head and it seems like it would work (probably with some caveats). Thoughts? Does something like this already exist? Is it mechanically possible to be more efficient if so, versus a twin turbo? update The COMPRESSOR wheel could be single but slightly larger than usual because it would spin at great speeds throughout the band.. maybe even a dual compressor wheel! Or am I retarded? * Registered users of the site do not see these ads. Last edited by Half Crazed; 01-24-2013 at 08:45 PM.

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01-22-2013, 12:34 AM	#2
TIGWERKS Scooby Newbie Member#: 256615 Join Date: Sep 2010	Already present in the diesel world. I believe the new ford 6.7l uses a dual compressor wheel setup.

01-22-2013, 01:03 AM	#4
rocketperson7 Scooby Newbie Member#: 283968 Join Date: May 2011 Chapter/Region: MWSOC Location: Fort Wayne, IN Vehicle: 2003 WRX MBP	you didn't look very hard.. http://news.pickuptrucks.com/2009/08...el-engine.html

01-23-2013, 09:33 PM	#5
3MI Racing NASIOC Vendor Member#: 200987 Join Date: Jan 2009 Chapter/Region: MAIC Location: VA	That compressor looks so cool. When doing turbo testing, back when I was in the diesel powertrain world, I would just stair at that thing and think of the g-code Yippy for CAD-CAM programs

01-23-2013, 09:57 PM	#6
wantsti Scooby Specialist Member#: 134764 Join Date: Dec 2006 Chapter/Region: RMIC Location: Lindon, Utah Vehicle: 04 sti java black pearl	That's way cool

01-24-2013, 08:43 PM	#8
Half Crazed NASIOC Supporter Member#: 321842 Join Date: May 2012 Chapter/Region: South East Location: Bentonville, AR Vehicle: 2008 STi Blue	Sorry guys, I was completely opposite of my terminology! I meant the turbine wheel - not COMPRESSOR wheel! Sorry! Look at it again

01-29-2013, 08:53 PM	#9
rocketperson7 Scooby Newbie Member#: 283968 Join Date: May 2011 Chapter/Region: MWSOC Location: Fort Wayne, IN Vehicle: 2003 WRX MBP	yes, it's called Holset VGT or Garrett VNT

01-29-2013, 09:16 PM	#11
drewvdw NASIOC Supporter Member#: 255776 Join Date: Aug 2010 Chapter/Region: MWSOC Location: Laramie, WY Vehicle: 2010 LR WRX MPS and PAR powered.	I think I understand what you mean, like two separate exhaust turbines sharing the same shaft and outlet, just two separate inlets. Small, quick spooling turbine closest to the compressor, then a larger, high volume turbine on the opposite end. Think of it like having a 1.5 scroll up pipe, except only one could get flow at a time (That would take a little engineering). The exhaust flows through the small turbine until a specified turbine RPM, then a solenoid or some sort of device switches exhaust flow to the second, larger turbine. Interesting thought to ponder...

01-30-2013, 04:57 PM	#13
BrioBriss Scooby Newbie Member#: 345434 Join Date: Jan 2013	Wow that looks cool!

01-30-2013, 05:34 PM	#14
Matty_STi Scooby Newbie Member#: 333602 Join Date: Sep 2012	Why not vgt plus dual turbines and compressors with rocket style antilag thrown in for good measure!!! So much torque you could screw with the earths rotation! Damn. I want 100 psi of boost at idle!!!!!!!! Lol