OM617.952 Maximum Exhaust Pressure
OM617.952 Maximum Exhaust Pressure
Once I get my head back I might have to rig up a test bench to see the cracking pressure....
Newbie-read this: Cheap Tricks
617.952-220k-Getting built up
larsalan I guess I need to look at this stupid ass drip shit. What you have to like mess with those elements on the pump? What a fucking hassle. then use some wire to hold the throttle open or some shit?
Simpler=Better
02-09-2012, 08:36 PM #1Does anyone know the maximum exhaust manifold pressure that the 617A can handle?
Once I get my head back I might have to rig up a test bench to see the cracking pressure....
Newbie-read this: Cheap Tricks
617.952-220k-Getting built up
larsalan I guess I need to look at this stupid ass drip shit. What you have to like mess with those elements on the pump? What a fucking hassle. then use some wire to hold the throttle open or some shit?
Newbie-read this: Cheap Tricks
617.952-220k-Getting built up
larsalan I guess I need to look at this stupid ass drip shit. What you have to like mess with those elements on the pump? What a fucking hassle. then use some wire to hold the throttle open or some shit?
Simpler=Better
02-09-2012, 08:46 PM #3Exhaust. As in the pressure pre-turbo, between the exhaust valves and the turbine. I'm worried about floating a valve.
Newbie-read this: Cheap Tricks
617.952-220k-Getting built up
larsalan I guess I need to look at this stupid ass drip shit. What you have to like mess with those elements on the pump? What a fucking hassle. then use some wire to hold the throttle open or some shit?
The highest I know of is Forced, who with his old turbo on a hard take-off would get a little over 40 psi backpressure, and apparently no ill effects engine side.
Personally I have had as high as 30 psi backpressure in my setup and my engine still runs like a top. When your backpressure gets that high there is a very noticeable choking of the engine though.
1984 300D 4-speed ~200,000 miles
7.5mm M-pump, GT3582 turbo, F-Tune Performance intake/exhaust manifolds, A/A intercooler, 315 nozzles, Enlarged prechambers, Bosch 044 feed pump, Custom lightweight flywheel with 240mm clutch, Lowered, 17" AMG rims - 300 hp OM617 project
1985 300D 280,000 miles RIP
2001 F350 7.3 DP tuner, 4"exhaust, S&B intake
led-panzer
02-09-2012, 09:25 PM #4So basically your asking about backpressure.
The highest I know of is Forced, who with his old turbo on a hard take-off would get a little over 40 psi backpressure, and apparently no ill effects engine side.
Personally I have had as high as 30 psi backpressure in my setup and my engine still runs like a top. When your backpressure gets that high there is a very noticeable choking of the engine though.
1984 300D 4-speed ~200,000 miles
7.5mm M-pump, GT3582 turbo, F-Tune Performance intake/exhaust manifolds, A/A intercooler, 315 nozzles, Enlarged prechambers, Bosch 044 feed pump, Custom lightweight flywheel with 240mm clutch, Lowered, 17" AMG rims - 300 hp OM617 project
1985 300D 280,000 miles RIP
2001 F350 7.3 DP tuner, 4"exhaust, S&B intake
I'll whip up a test bench and pressurize the exhaust manifold while the head is off the car.
Newbie-read this: Cheap Tricks
617.952-220k-Getting built up
larsalan I guess I need to look at this stupid ass drip shit. What you have to like mess with those elements on the pump? What a fucking hassle. then use some wire to hold the throttle open or some shit?
Simpler=Better
02-10-2012, 10:11 AM #5Thanks, I'm hoping to run 28psi on the intake so the exhaust might get a little high too....we will see I guess
I'll whip up a test bench and pressurize the exhaust manifold while the head is off the car.
Newbie-read this: Cheap Tricks
617.952-220k-Getting built up
larsalan I guess I need to look at this stupid ass drip shit. What you have to like mess with those elements on the pump? What a fucking hassle. then use some wire to hold the throttle open or some shit?
You probably won't be able to open the vanes all the way and still maintain boost (because the housing is so large) which may present an issue. As long as its equal to your boost you're fine. The best thing is when boost is higher than backpressure.
1984 300D 4-speed ~200,000 miles
7.5mm M-pump, GT3582 turbo, F-Tune Performance intake/exhaust manifolds, A/A intercooler, 315 nozzles, Enlarged prechambers, Bosch 044 feed pump, Custom lightweight flywheel with 240mm clutch, Lowered, 17" AMG rims - 300 hp OM617 project
1985 300D 280,000 miles RIP
2001 F350 7.3 DP tuner, 4"exhaust, S&B intake
led-panzer
02-10-2012, 11:59 AM #6If you get that ginormous turbo tuned properly I don't think backpressure will be an issue for you. Turbine housing is huge
You probably won't be able to open the vanes all the way and still maintain boost (because the housing is so large) which may present an issue. As long as its equal to your boost you're fine. The best thing is when boost is higher than backpressure.
1984 300D 4-speed ~200,000 miles
7.5mm M-pump, GT3582 turbo, F-Tune Performance intake/exhaust manifolds, A/A intercooler, 315 nozzles, Enlarged prechambers, Bosch 044 feed pump, Custom lightweight flywheel with 240mm clutch, Lowered, 17" AMG rims - 300 hp OM617 project
1985 300D 280,000 miles RIP
2001 F350 7.3 DP tuner, 4"exhaust, S&B intake
I'll be keeping an eye on things once it's all together. On a side note, my order of operations goes like this:Rebuild starter
Reinstall head
Set timing
Run N/A for testing
Start.
Replace timing chain
Reset timing
Make adapter
Install in truck
Add turbo :p
Newbie-read this: Cheap Tricks
617.952-220k-Getting built up
larsalan I guess I need to look at this stupid ass drip shit. What you have to like mess with those elements on the pump? What a fucking hassle. then use some wire to hold the throttle open or some shit?
Simpler=Better
02-10-2012, 02:24 PM #7Okey dokey I'll be keeping an eye on things once it's all together. On a side note, my order of operations goes like this:
Rebuild starter
Reinstall head
Set timing
Run N/A for testing
Start.
Replace timing chain
Reset timing
Make adapter
Install in truck
Add turbo :p
Newbie-read this: Cheap Tricks
617.952-220k-Getting built up
larsalan I guess I need to look at this stupid ass drip shit. What you have to like mess with those elements on the pump? What a fucking hassle. then use some wire to hold the throttle open or some shit?
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