Duramax Diesels Forum Truck of the Week
  #16  
Old 01-14-2020, 07:55 AM
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Originally Posted by WolfLLY View Post
I did too. The problem is diesel exhaust is too slow. I had much better results just venting to atmosphere. We all know the physics behind the design, but sometimes the practicality of them come into question. I too just vent to the atmosphere now. Simpler and works every time. Jmo
Good to note. I need to do something as just running a hose to the ground is going to get me flagged at the local track as they believe it is a safety concern.
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  #17  
Old 01-14-2020, 08:49 AM
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Originally Posted by Chevy1925 View Post
not unless you want to pressurize the crank case. Up pipes are under positive pressure the moment you start to come on boost (actually before boost comes on but close enough).
But what about the flow through the up-pipe? Its not deadheaded so it shouldn't push into the crankcase.
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  #18  
Old 01-14-2020, 08:52 AM
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Originally Posted by DuramaxRamRod View Post
But what about the flow through the up-pipe? Its not deadheaded so it shouldn't push into the crankcase.
It's physics at the end of the day, air/fluids (air can be analyzed as a fluid) will always flow from high pressure to low pressure via the path of least resistance. The crankcase is under MUCH less pressure than the up-pipes are thus the exhaust flow will try and go into the crankcase via the lines ran to the up-pipes.
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K&D Service Inc
Call or Text: 906-284-0962
Providing a "one-stop-shop" for all of your automotive needs!

Current Rides:
1) Toy: 2005 LLY ECSB, Leather, Sunroof
-1340hp/2200ft-lbs @ ATS Diesel (06/04/19)
-Built Motor, Forced Inductions Billet ETR Gen 4 S480/96/1.10 T6 w/V2 Race Cover, F1 Diesel 275% Inj, Exergy 14mm Street Pump/LBZ CP3, Goerend AR Converter, Billet Trans, Fuelab Supply Pump/Reg, RCD & Beans Sumps, Front E-Locker, TrueTrac, Yukon 4340 Rear Shafts, Traction Bars, DHD Center Link Brace, DHD Lower Crossmember Support, Banks iDash 1.8 Monitoring System
2) DD/Tow Rig: 2002 LB7 CCSB, Leather, Loaded
-Cast S475/96/1.10 T6 Over Stock IHI, FASS 150,4" Exhaust, RCD Sump, PPE Sleeves, DHD Centerlink Brace, DHD Lower Crossmember Support, "Budget" Motor, Big Oil Cooling, Banks iDash 1.8 Monitoring System
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  #19  
Old 01-14-2020, 09:14 AM
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Quote:
Originally Posted by Bdsankey View Post
It's physics at the end of the day, air/fluids (air can be analyzed as a fluid) will always flow from high pressure to low pressure via the path of least resistance. The crankcase is under MUCH less pressure than the up-pipes are thus the exhaust flow will try and go into the crankcase via the lines ran to the up-pipes.
But this is an evac/eductor type fitting. Besides pressure there is also velocity, which also plays a role in fluid flow. Otherwise eductors would not exist.
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  #20  
Old 01-14-2020, 09:15 AM
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Originally Posted by DuramaxRamRod View Post
But this is an evac/eductor type fitting. Besides pressure there is also velocity, which also plays a role in fluid flow. Otherwise eductors would not exist.
I've never seen a fitting like this in a high pressure scavenge situation in an industrial setting. The other thing you will be doing is impeding flow in the up-pipe to a large degree.
__________________
K&D Service Inc
Call or Text: 906-284-0962
Providing a "one-stop-shop" for all of your automotive needs!

Current Rides:
1) Toy: 2005 LLY ECSB, Leather, Sunroof
-1340hp/2200ft-lbs @ ATS Diesel (06/04/19)
-Built Motor, Forced Inductions Billet ETR Gen 4 S480/96/1.10 T6 w/V2 Race Cover, F1 Diesel 275% Inj, Exergy 14mm Street Pump/LBZ CP3, Goerend AR Converter, Billet Trans, Fuelab Supply Pump/Reg, RCD & Beans Sumps, Front E-Locker, TrueTrac, Yukon 4340 Rear Shafts, Traction Bars, DHD Center Link Brace, DHD Lower Crossmember Support, Banks iDash 1.8 Monitoring System
2) DD/Tow Rig: 2002 LB7 CCSB, Leather, Loaded
-Cast S475/96/1.10 T6 Over Stock IHI, FASS 150,4" Exhaust, RCD Sump, PPE Sleeves, DHD Centerlink Brace, DHD Lower Crossmember Support, "Budget" Motor, Big Oil Cooling, Banks iDash 1.8 Monitoring System
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  #21  
Old 01-14-2020, 09:37 AM
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Quote:
Originally Posted by Bdsankey View Post
I've never seen a fitting like this in a high pressure scavenge situation in an industrial setting. The other thing you will be doing is impeding flow in the up-pipe to a large degree.
The up-pipe is not a purpose built eductor so I don't know how well this fitting actually works at creating a similar effect.
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