How come nobody appears to be monitoring exhaust backpressure?
How come nobody appears to be monitoring exhaust backpressure?
08-10-2010, 08:41 PM
#2
1987 300SDL 6spd manual om606.962 swap project
1985 300td euro 5spd wagon running
willbhere4u
08-10-2010, 08:41 PM #2I've seen it done before ask forcedinduction
1987 300SDL 6spd manual om606.962 swap project
1985 300td euro 5spd wagon running
08-11-2010, 12:11 AM
#3
This post was last modified: 08-11-2010, 12:12 AM by Rudolf_Diesel.
1982 300SD: 304,xxx Super M-pump with 7.5mm elements, 265 Nozzles, GT35 water cooled turbo, M90 Supercharger, A/W Intercooler, Serpentine drive belt, 3" SS exhaust with Magnaflow muffler, 240 breather, AEM dry Filter, Manual Boost Control, EGT / Boost / EMP gauges....Moved on to other projects
1995 F-350 7.3L PSD: 230,xxx 6.0 IC, DIY Stage 1 Injectors, 17* hpop, Tony Wildman Chip, John Wood Trans, 6.4L TC, 3" down pipe, 4" straight exhaust, 310 HP on wheel dyno - 8500# dually: 0-60 in 6.98
Suzuki Samurai: VW 1.9L TD, Trackick doubler transfer case (made by me) 5.8:1 transfer case gears, YJ springs front and rear with rear missing links, wheel base extended 14", diffs welded, some day a VNT.
Rudolf_Diesel
08-11-2010, 12:11 AM #3I am going to be using one on my new project. I found a port from a Jaguar exhaust system that I incorporated into the exhaust manifold and ran an aluminum tube about 16" long to dissipate the heat and then to a poly tube to a VDO boost gauge. I drilled and tapped just above the turbo flange.
1982 300SD: 304,xxx Super M-pump with 7.5mm elements, 265 Nozzles, GT35 water cooled turbo, M90 Supercharger, A/W Intercooler, Serpentine drive belt, 3" SS exhaust with Magnaflow muffler, 240 breather, AEM dry Filter, Manual Boost Control, EGT / Boost / EMP gauges....Moved on to other projects
1995 F-350 7.3L PSD: 230,xxx 6.0 IC, DIY Stage 1 Injectors, 17* hpop, Tony Wildman Chip, John Wood Trans, 6.4L TC, 3" down pipe, 4" straight exhaust, 310 HP on wheel dyno - 8500# dually: 0-60 in 6.98
Suzuki Samurai: VW 1.9L TD, Trackick doubler transfer case (made by me) 5.8:1 transfer case gears, YJ springs front and rear with rear missing links, wheel base extended 14", diffs welded, some day a VNT.
08-11-2010, 06:28 AM
#4
I have a brass 1/8NPT to 3/16 pipe fitting to the left of the flange area with about 2' total of copper before going to a rubber coupler and 1/8" nylon air hose to the gauge.
I've seen as high as 50psi EMP without problems, but that high backpressure is why I'm getting a GT23v to replace the GT22v.
I can only imagine the pressure on the guy's engine thats running 30psi boost on a wastegate disabled stock T3.
This post was last modified: 08-11-2010, 06:37 AM by ForcedInduction.
ForcedInduction
08-11-2010, 06:28 AM
#4
Middle is boost, right is EMP. A normal boost gauge is all I use. I went with 2x the boost gauge to make on-the-fly determination of the boost:emp ratio quick and easy.
I have a brass 1/8NPT to 3/16 pipe fitting to the left of the flange area with about 2' total of copper before going to a rubber coupler and 1/8" nylon air hose to the gauge.
I've seen as high as 50psi EMP without problems, but that high backpressure is why I'm getting a GT23v to replace the GT22v.
I can only imagine the pressure on the guy's engine thats running 30psi boost on a wastegate disabled stock T3.
08-11-2010, 02:38 PM
#5
This post was last modified: 08-11-2010, 02:38 PM by Captain America.
1982 300D Turbo ... 3,6xxlbs, No fan, No AC, Hood Stack, No ALDA, No rear bumper and stuffed front, A/W Intercooled, Injectors by Greezer and HUGE Pre-Chambers with help from OM616 & Simpler=Better, Fuel Cranked up, 60 Trim Compressor wheel, EGT, EMP, Boost 50" Rigid Radius bar on roof Aux tank for a total of 48 Gal Of Diesel! Odyssey PC-1750 Battery in trunk, 27"x8.5"/R14 Maxxis BigHorn Mud Terrains, In June '14 issue of Off Road Mag
AX15 Jeep Trans swap in progress....
Captain America
08-11-2010, 02:38 PM #5While on this subject.... Is there any need for an EMP gauge with use of a non VNT/VGT turbo, Like the stock T3?
1982 300D Turbo ... 3,6xxlbs, No fan, No AC, Hood Stack, No ALDA, No rear bumper and stuffed front, A/W Intercooled, Injectors by Greezer and HUGE Pre-Chambers with help from OM616 & Simpler=Better, Fuel Cranked up, 60 Trim Compressor wheel, EGT, EMP, Boost 50" Rigid Radius bar on roof Aux tank for a total of 48 Gal Of Diesel! Odyssey PC-1750 Battery in trunk, 27"x8.5"/R14 Maxxis BigHorn Mud Terrains, In June '14 issue of Off Road Mag
AX15 Jeep Trans swap in progress....
08-11-2010, 02:52 PM
#6
OM605 600hp diesel drag car build with BMW E30 chassis
I have put little fuel filter between exhaust pressure hose, so all shit dont go on gauge.
OM605 600hp diesel drag car build with BMW E30 chassis
08-11-2010, 02:53 PM
#7
(08-11-2010, 02:52 PM)jeemu I have put little fuel filter between exhaust pressure hose, so all shit dont go on gauge.
Yes! Fantastic Idea, I have done the same for my boost gauge.
1982 300D Turbo ... 3,6xxlbs, No fan, No AC, Hood Stack, No ALDA, No rear bumper and stuffed front, A/W Intercooled, Injectors by Greezer and HUGE Pre-Chambers with help from OM616 & Simpler=Better, Fuel Cranked up, 60 Trim Compressor wheel, EGT, EMP, Boost 50" Rigid Radius bar on roof Aux tank for a total of 48 Gal Of Diesel! Odyssey PC-1750 Battery in trunk, 27"x8.5"/R14 Maxxis BigHorn Mud Terrains, In June '14 issue of Off Road Mag
AX15 Jeep Trans swap in progress....
Captain America
08-11-2010, 02:53 PM #7(08-11-2010, 02:52 PM)jeemu I have put little fuel filter between exhaust pressure hose, so all shit dont go on gauge.
Yes! Fantastic Idea, I have done the same for my boost gauge.
1982 300D Turbo ... 3,6xxlbs, No fan, No AC, Hood Stack, No ALDA, No rear bumper and stuffed front, A/W Intercooled, Injectors by Greezer and HUGE Pre-Chambers with help from OM616 & Simpler=Better, Fuel Cranked up, 60 Trim Compressor wheel, EGT, EMP, Boost 50" Rigid Radius bar on roof Aux tank for a total of 48 Gal Of Diesel! Odyssey PC-1750 Battery in trunk, 27"x8.5"/R14 Maxxis BigHorn Mud Terrains, In June '14 issue of Off Road Mag
AX15 Jeep Trans swap in progress....
08-11-2010, 06:27 PM
#8
Therefore i have welded an stainless steel tube, about 15" long into the EGR blockoff plate besides the EGT sensor, then coupled with an silicone hose to the gauge.
I have chosen a 6bar type gauge, but never seen more than 2.5 or 2.6 until now with 2.3bar boost in high rpm range (over 4000rpm) so i think you will be ok with an 40 or 50psi gauge as long as you dont have an extremly restrictive turbine....
Regards, Alex
I use a conventional hydraulic gauge (glycerin dampened) for monitoring emp before turbine.
Therefore i have welded an stainless steel tube, about 15" long into the EGR blockoff plate besides the EGT sensor, then coupled with an silicone hose to the gauge.
I have chosen a 6bar type gauge, but never seen more than 2.5 or 2.6 until now with 2.3bar boost in high rpm range (over 4000rpm) so i think you will be ok with an 40 or 50psi gauge as long as you dont have an extremly restrictive turbine....
Regards, Alex
08-11-2010, 07:06 PM
#9
Quote:Is there any need for an EMP gauge with use of a non VNT/VGT turbo, Like the stock T3?For the stock system, not really. MB did those measurements decades ago. If you're going to modify the engine and go beyond the stock 9/13psi it would be useful though. For non-stock turbo it should be used at least the first few weeks to help determine if the turbo is a good match to the engine.
ForcedInduction
08-11-2010, 07:06 PM
#9
A fluid filled gauge is preferable. Sometimes my gauge buzzes during acceleration, but its not that annoying and the needle doesn't bounce.
Quote:Is there any need for an EMP gauge with use of a non VNT/VGT turbo, Like the stock T3?For the stock system, not really. MB did those measurements decades ago. If you're going to modify the engine and go beyond the stock 9/13psi it would be useful though. For non-stock turbo it should be used at least the first few weeks to help determine if the turbo is a good match to the engine.
08-11-2010, 11:04 PM
#10
(08-11-2010, 07:06 PM)ForcedInduction A fluid filled gauge is preferable. Sometimes my gauge buzzes during acceleration, but its not that annoying and the needle doesn't bounce.
Quote:Is there any need for an EMP gauge with use of a non VNT/VGT turbo, Like the stock T3?For the stock system, not really. MB did those measurements decades ago. If you're going to modify the engine and go beyond the stock 9/13psi it would be useful though. For non-stock turbo it should be used at least the first few weeks to help determine if the turbo is a good match to the engine.
Right, they did the R&D with stock boost... I am only running 13-14 psi now which I dont see often with the stock T3, just with a 60 trim compressor wheel. I plan to up the boost as well as play with the IP very soon. I do not have a EGT yet so I have held off on playing with too much. I want to order gauges so I'm wondering if EMP should be one of them... I do not plan on changing the turbo anytime soon.
1982 300D Turbo ... 3,6xxlbs, No fan, No AC, Hood Stack, No ALDA, No rear bumper and stuffed front, A/W Intercooled, Injectors by Greezer and HUGE Pre-Chambers with help from OM616 & Simpler=Better, Fuel Cranked up, 60 Trim Compressor wheel, EGT, EMP, Boost 50" Rigid Radius bar on roof Aux tank for a total of 48 Gal Of Diesel! Odyssey PC-1750 Battery in trunk, 27"x8.5"/R14 Maxxis BigHorn Mud Terrains, In June '14 issue of Off Road Mag
AX15 Jeep Trans swap in progress....
Captain America
08-11-2010, 11:04 PM #10(08-11-2010, 07:06 PM)ForcedInduction A fluid filled gauge is preferable. Sometimes my gauge buzzes during acceleration, but its not that annoying and the needle doesn't bounce.
Quote:Is there any need for an EMP gauge with use of a non VNT/VGT turbo, Like the stock T3?For the stock system, not really. MB did those measurements decades ago. If you're going to modify the engine and go beyond the stock 9/13psi it would be useful though. For non-stock turbo it should be used at least the first few weeks to help determine if the turbo is a good match to the engine.
Right, they did the R&D with stock boost... I am only running 13-14 psi now which I dont see often with the stock T3, just with a 60 trim compressor wheel. I plan to up the boost as well as play with the IP very soon. I do not have a EGT yet so I have held off on playing with too much. I want to order gauges so I'm wondering if EMP should be one of them... I do not plan on changing the turbo anytime soon.
1982 300D Turbo ... 3,6xxlbs, No fan, No AC, Hood Stack, No ALDA, No rear bumper and stuffed front, A/W Intercooled, Injectors by Greezer and HUGE Pre-Chambers with help from OM616 & Simpler=Better, Fuel Cranked up, 60 Trim Compressor wheel, EGT, EMP, Boost 50" Rigid Radius bar on roof Aux tank for a total of 48 Gal Of Diesel! Odyssey PC-1750 Battery in trunk, 27"x8.5"/R14 Maxxis BigHorn Mud Terrains, In June '14 issue of Off Road Mag
AX15 Jeep Trans swap in progress....
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