Cross posted on DP for broader exposure.
I didn't expect to have a problem sorting the drain line for this thing, but turns out I was wrong.
I've got a 6.2 with Holset Baby H1C mounted on a Banks exhaust manifold. Holset says a MINIMUM drain tube ID of 7/8". But it seems the standard go-to is -10 AN braided line, which has a restriction at the -10 fittings of less than 1/2" ID.
And to really complicate things, the turbo mounts so low that it's almost impossible to maintain a decent slope. I previously thought that the common return piped into the fuel pump block off, but that would produce almost no slope with problematic routing. Fortunately that wasn't my plan, and I have a 3/4" NPT bung brazed into the oil pan a bit above the fill line behind the crossover downpipe obstruction.
Which all together means I need to drop down from the cartridge about 3" to get under the hot side housing with about 1/2" clearance. It then has to route toward the motor mount before making an arc back around the downpipe and under the exhaust manifold to hit the pan bung for maybe a 10* down slope IF I start it with a 100* elbow.
And as close as it is to the hot side housing, cross over, and exhaust manifold, plus the oil returning gets much hotter than common for engine oil, options like common oil line or silicone hose won't work due to heat limits. Teflon appears a better choice, maybe with a heat sleeve, but still seems less than ideal.
The only thing I can come up with is to do the same as the crossover and weld it out of 1" tube mandrel bends. But that's going to make it tough given the ideal arc being something like a 5" radius. I've got a 1" die with 3" radius for my tube bender, so maybe that's the best route? Then only have to have a very short hose (silicone?) for that last ~1" gap connector to the bung with a modified nipple to match the 1" ID hose needed for the fabricated drain.
Oh, and I went yesterday to a local high pressure hose shop to see what they had. Thinking maybe hydraulic hose of some sort. But they didn't recommend it in a close space like that exposed to direct heat. And the best option they did have (not recommended) was VERY stiff making routing difficult, and no real solution for the section straight down from the cartridge flange before it can go rearward under the hot side. So that could still be an option with me fabricating the vertical drop and welding on a bung to fit some sort of hydraulic fitting (TBD) below the turbo. That at least gets the hose out from between the turbo housings, but still...
I figure I've got to be missing something. What is it?
I didn't expect to have a problem sorting the drain line for this thing, but turns out I was wrong.
I've got a 6.2 with Holset Baby H1C mounted on a Banks exhaust manifold. Holset says a MINIMUM drain tube ID of 7/8". But it seems the standard go-to is -10 AN braided line, which has a restriction at the -10 fittings of less than 1/2" ID.
And to really complicate things, the turbo mounts so low that it's almost impossible to maintain a decent slope. I previously thought that the common return piped into the fuel pump block off, but that would produce almost no slope with problematic routing. Fortunately that wasn't my plan, and I have a 3/4" NPT bung brazed into the oil pan a bit above the fill line behind the crossover downpipe obstruction.
Which all together means I need to drop down from the cartridge about 3" to get under the hot side housing with about 1/2" clearance. It then has to route toward the motor mount before making an arc back around the downpipe and under the exhaust manifold to hit the pan bung for maybe a 10* down slope IF I start it with a 100* elbow.
And as close as it is to the hot side housing, cross over, and exhaust manifold, plus the oil returning gets much hotter than common for engine oil, options like common oil line or silicone hose won't work due to heat limits. Teflon appears a better choice, maybe with a heat sleeve, but still seems less than ideal.
The only thing I can come up with is to do the same as the crossover and weld it out of 1" tube mandrel bends. But that's going to make it tough given the ideal arc being something like a 5" radius. I've got a 1" die with 3" radius for my tube bender, so maybe that's the best route? Then only have to have a very short hose (silicone?) for that last ~1" gap connector to the bung with a modified nipple to match the 1" ID hose needed for the fabricated drain.
Oh, and I went yesterday to a local high pressure hose shop to see what they had. Thinking maybe hydraulic hose of some sort. But they didn't recommend it in a close space like that exposed to direct heat. And the best option they did have (not recommended) was VERY stiff making routing difficult, and no real solution for the section straight down from the cartridge flange before it can go rearward under the hot side. So that could still be an option with me fabricating the vertical drop and welding on a bung to fit some sort of hydraulic fitting (TBD) below the turbo. That at least gets the hose out from between the turbo housings, but still...
I figure I've got to be missing something. What is it?
