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04-23-2020, 12:36 PM
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#1
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Name: CTD2500
Title: Brown Between the Cheeks
Status: Not Here
Join Date: Aug 2013
Location: London, ON
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Posts: 454
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Different sized volutes?
Take a look at the pictures in this listing:
MAMBA Turbine Housing Garrett GT35R GTX3576R A/R .86 Twin Scroll T4 V-Band | eBay
I’ve seen this a few times now, where a twin scroll turbine housing appears to have one volute bigger than the other. Why do they do this?
My guess is that it promotes a wider range of response and flow without moving parts. I suppose it’s also possible that one just looks bigger than the other because of how it’s cast, but the difference looks pretty pronounced so I don’t think that’s the case.
I don’t know, what do you guys think?
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95 Ram 2500 4X4 RCLB, 4K GSK, 19°, DDP4 injectors, 024 DV, two 257/362 SXE triples, 178-208 cam, ported head, 2 intercoolers, SS manifold, 5" exhaust, Goerend T/C, ATS V/B, built auto w/ billet input, 4th Gen brakes
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04-23-2020, 12:51 PM
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#2
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Name: fatty
Title: VE
Status:
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Join Date: Mar 2009
Location: SW Idaho
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Posts: 957
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They look to be the same size to me.
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91.5 W250
2019 F350
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04-23-2020, 01:22 PM
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#3
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Name: CTD2500
Title: Brown Between the Cheeks
Status: Not Here
Join Date: Aug 2013
Location: London, ON
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Posts: 454
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4th, 5th and 6th pictures. The scroll closer to the exhaust outlet looks smaller, does it not?
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95 Ram 2500 4X4 RCLB, 4K GSK, 19°, DDP4 injectors, 024 DV, two 257/362 SXE triples, 178-208 cam, ported head, 2 intercoolers, SS manifold, 5" exhaust, Goerend T/C, ATS V/B, built auto w/ billet input, 4th Gen brakes
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04-27-2020, 04:30 PM
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#4
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Name: 56cummins
Title: Too Much Time
Status: Not Here
Join Date: Mar 2014
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Posts: 733
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EFR's are the same way. Closer to the exducer needs more velocity to match the speed? Its closer to the exit, so there isn't a backpressure penalty?
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95 cummins
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04-28-2020, 09:03 AM
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#5
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Name: zfaylor
Title: Comp Diesel Sponsor
Status: Not Here
Join Date: Nov 2010
Location: P-TOWN!, Indiana
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Posts: 5,024
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Thats just a very slight difference in the casting on that one. Doesn't appear to be much different at all.
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2015 half ton heavy chevy
81 Fairmont LS project
Many yard ornament projects...
North American Turbo
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04-28-2020, 11:40 AM
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#6
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Name: CTD2500
Title: Brown Between the Cheeks
Status: Not Here
Join Date: Aug 2013
Location: London, ON
Member`s Gallery
Posts: 454
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__________________
95 Ram 2500 4X4 RCLB, 4K GSK, 19°, DDP4 injectors, 024 DV, two 257/362 SXE triples, 178-208 cam, ported head, 2 intercoolers, SS manifold, 5" exhaust, Goerend T/C, ATS V/B, built auto w/ billet input, 4th Gen brakes
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04-05-2021, 08:52 AM
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#7
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Name: WUnderwood
Title: CompD Minion
Status: Not Here
Join Date: Aug 2006
Location: Texas
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Posts: 8,418
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open sesame
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2011 Ford F-150 Lariat 4X4
RIP BFD99, jponder, and Forrest Nearing
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04-05-2021, 06:33 PM
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#8
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Name: CTD2500
Title: Brown Between the Cheeks
Status: Not Here
Join Date: Aug 2013
Location: London, ON
Member`s Gallery
Posts: 454
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Just wanted to add this video I found the other day. Seemed relevant because the exhaust housing design in the video is similar to what I was thinking for this thread (minus the balancing valve).
Cats BETTER idea for a Turbo. The Asymmetrical Twin Scroll Turbocharger. - YouTube
Kind of interesting.
__________________
95 Ram 2500 4X4 RCLB, 4K GSK, 19°, DDP4 injectors, 024 DV, two 257/362 SXE triples, 178-208 cam, ported head, 2 intercoolers, SS manifold, 5" exhaust, Goerend T/C, ATS V/B, built auto w/ billet input, 4th Gen brakes
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04-06-2021, 06:54 PM
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#9
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Name: chevota84
Title: Too Much Time
Status: Not Here
Join Date: Jul 2009
Location: Prineville, OR
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Posts: 4,926
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Quote:
Originally Posted by CTD2500
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Lol I just watched that yesterday and I was coming back here to link it
Sent from my SM-G975U using Tapatalk
__________________
99 Dodge 2500 with stuff
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04-06-2021, 11:08 PM
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#10
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Name: biggy238
Title: Too Much Time
Status: Not Here
Join Date: Aug 2008
Location: Just North of Wrong
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Posts: 10,820
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Got one in the garage. Need pics?
Sent from my motorola one 5G using Tapatalk
__________________
Check out @bdmaximusworx
05.5 Campanella White TDi Jetta 5spd 45.5MPG
-Little Sexy
'10 Silver F250 CCLB 4X4 6.4L cummins Swapped
Insta @trash.panda250
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04-07-2021, 07:49 AM
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#11
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Name: CTD2500
Title: Brown Between the Cheeks
Status: Not Here
Join Date: Aug 2013
Location: London, ON
Member`s Gallery
Posts: 454
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Quote:
Originally Posted by biggy238
Got one in the garage. Need pics?
Sent from my motorola one 5G using Tapatalk
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Sure, let’s see what you got.
__________________
95 Ram 2500 4X4 RCLB, 4K GSK, 19°, DDP4 injectors, 024 DV, two 257/362 SXE triples, 178-208 cam, ported head, 2 intercoolers, SS manifold, 5" exhaust, Goerend T/C, ATS V/B, built auto w/ billet input, 4th Gen brakes
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04-07-2021, 07:52 PM
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#12
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Name: JWhite
Title: Trained monkey
Status: Not Here
Join Date: Aug 2009
Location: F Burg Ohio
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Posts: 1,817
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So how does this setup work properly if the ECM can't control the turbo like the linked video? (Assuming what that guy says is correct). And if you have a divided manifold, would half the cylinders being choked down really benefit anything?
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GMC with a LiLLY
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04-07-2021, 11:08 PM
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#13
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Name: biggy238
Title: Too Much Time
Status: Not Here
Join Date: Aug 2008
Location: Just North of Wrong
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Posts: 10,820
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Quote:
Originally Posted by JWhite
So how does this setup work properly if the ECM can't control the turbo like the linked video? (Assuming what that guy says is correct). And if you have a divided manifold, would half the cylinders being choked down really benefit anything?
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The only reason it's been utilized by oem's is to force flow through the EGR system. They are all computer controlled to my knowledge.
I didn't come back in time to take pictures. I will get some tomorrow.
Sent from my motorola one 5G using Tapatalk
__________________
Check out @bdmaximusworx
05.5 Campanella White TDi Jetta 5spd 45.5MPG
-Little Sexy
'10 Silver F250 CCLB 4X4 6.4L cummins Swapped
Insta @trash.panda250
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04-10-2021, 03:20 PM
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#14
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Name: biggy238
Title: Too Much Time
Status: Not Here
Join Date: Aug 2008
Location: Just North of Wrong
Member`s Gallery
Posts: 10,820
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__________________
Check out @bdmaximusworx
05.5 Campanella White TDi Jetta 5spd 45.5MPG
-Little Sexy
'10 Silver F250 CCLB 4X4 6.4L cummins Swapped
Insta @trash.panda250
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04-10-2021, 07:10 PM
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#15
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Name: CTD2500
Title: Brown Between the Cheeks
Status: Not Here
Join Date: Aug 2013
Location: London, ON
Member`s Gallery
Posts: 454
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What are the specs on that, just out of curiosity? Inducer, etc.
Thanks for posting.
__________________
95 Ram 2500 4X4 RCLB, 4K GSK, 19°, DDP4 injectors, 024 DV, two 257/362 SXE triples, 178-208 cam, ported head, 2 intercoolers, SS manifold, 5" exhaust, Goerend T/C, ATS V/B, built auto w/ billet input, 4th Gen brakes
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