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  #1  
Old 06-03-2003, 10:47 PM
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Booste Gauge port pitch?, size? Metric? 617 952

Anyone know if the port on the 5cyl 300 turbo Diesel (1984 era) for the booste gauge is metric threads orrr?. What ever it is what do u think the thread pitch and size it is?

After some talk with an engineer about an LP booste setup the desision is to use the port where the turbo booste gauge gets it's pressure. His suggestion was to put a Y into this port. ONe side of the Y will be the booste gauge and the other side the LP injection.
Anyone see a reason to NOT use this port. If so... please have handy a suggestion on another port usable for LP injection.

Why LP injection? Load up ur car or waggon with the 5cyl 300 turbo in it untill it weighs 5 1/2 tons then try driving up long upgrades and you'll understand why. You'll understand even better if you change the gear rations to LOW tractor like power. Thats my set up.. a Unimog w/the 617 925

LP will only be used on hills.. sorta like a nitrous kick in a gasser.

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The Glow Plug Wait: This waiting period is a moment of silence to pay honor to Rudolph Diesel. The longer you own your diesel the more honor you will give him". by SD Blue

My normal daily life; either SNAFUed- Situation Normal... All Fouled Up, or FUBARed- Fouled Up Beyond All Repair

62 UNIMOG Camper w/617 Turbo, 85 300SD daily driver- both powered by blended UCO fuels

Last edited by coachgeo; 06-06-2003 at 10:18 PM.
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  #2  
Old 06-06-2003, 09:10 PM
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To the top

repeat of questions.... is the turbo booste gauge's port on the turbo's elbow a metric orrr? thread? Pitch? size?

any reason not to use this spot with a Y sharing LP injection and the booste gauge?
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"If anyone knows other lessons I need to learn, please tell me. I'm tired of learning them the hard way".
by JerryBro


The Glow Plug Wait: This waiting period is a moment of silence to pay honor to Rudolph Diesel. The longer you own your diesel the more honor you will give him". by SD Blue

My normal daily life; either SNAFUed- Situation Normal... All Fouled Up, or FUBARed- Fouled Up Beyond All Repair

62 UNIMOG Camper w/617 Turbo, 85 300SD daily driver- both powered by blended UCO fuels
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Old 06-13-2003, 11:02 PM
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More info and questions

I found this pic while doing a search here on this BB. This is not my engine but it is a good sample shot. I labled it to show where my boost gauge line is installed. It is a standard SAE pipe thread I discovered today.

Here is what the engineer who designed the LP set up I have comming to me said about using this port for serveral purposes, including the boost gauge.

Quote:
The boost gauge port is the ideal place; a tee will be fine, or even two of them. The propane and water (injection) will have the max run length possible to evenly disperse. The propane is a gas of course, and will mix completely. The water will rapidly vaporize because of the heat and do likewise.
THanks,
Joel
I most likely wont do water inject at this time. Maybe Alcohol/Water someday "only if" it can replace effects of the LP. Just thinking that if say I ever venture onto a major excursion like heading toward the tip of South america.. LP will be harder to find than 99% alcohol!

My wonder is; is not pressure is going OUT this port to the boost gauge. So would that not mean that anything (or some of anything) that is injected here,go out toward the gauge and not into the intake?

Im also little concerned of LP leaking out into my cab at the gauge. NO SMOKING. The LP is intended to only be used for up hill climbs in my 5.5ton MB

Any comments on my wonderings and concers will be greatly appreciated
Attached Thumbnails
metric fitting, Booste Gauge, pitch, size?-boost3lbl.jpg  
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"If anyone knows other lessons I need to learn, please tell me. I'm tired of learning them the hard way".
by JerryBro


The Glow Plug Wait: This waiting period is a moment of silence to pay honor to Rudolph Diesel. The longer you own your diesel the more honor you will give him". by SD Blue

My normal daily life; either SNAFUed- Situation Normal... All Fouled Up, or FUBARed- Fouled Up Beyond All Repair

62 UNIMOG Camper w/617 Turbo, 85 300SD daily driver- both powered by blended UCO fuels
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  #4  
Old 06-14-2003, 06:22 AM
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Coach,
For a boost gauge most people run a line from the intake manifold. There should be a hollow bolt/banjo fitting at the back of the manifold with a line running to the ALDA on top of the IP.
T-ing into this line will be fine for a boost gauage. For your LP injection you might want to consider asking the engineer his opinion on introducing the LP before the turbo. In the picture the guy has a pressure regulator in the line to the waste gate.
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Old 06-14-2003, 11:01 AM
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ahhhhhhh this is getting interesting.

LP would be fine before the turbo, maybe even best. As for a later me experemening with injecting H20, Alcohol or a blend; NO that cant go before the turbo. That has to be after the turbo cause of potential damage to the impeller. I was just hoping to install both at once while I'm at it but not messing with injecting any H20 till later. Thats why I was thinking of using a Y fitting cause it would simplify things.

Are there any existing parts to use before the turbo? I have little to no space to drill and tap new ports is the problem and everything is metal. Granted drilling a port before the turbo would be at least easier to clean out any metal shavings if I can get a drilll to fit into there to do it.

Moving the boost gauge to the banjo in back is a GREAT idea!!! There are two bolt heads back there. On my engine there is a secnd one directly below the banjo. Is the second one also a port? If so would it make a good spot for a pressure controller for the wastegate?. Man if so.... I could install in the cab wastegate controll. Above the engine in the Unimog is some dash area so this could be SWEET.
__________________
"If anyone knows other lessons I need to learn, please tell me. I'm tired of learning them the hard way".
by JerryBro


The Glow Plug Wait: This waiting period is a moment of silence to pay honor to Rudolph Diesel. The longer you own your diesel the more honor you will give him". by SD Blue

My normal daily life; either SNAFUed- Situation Normal... All Fouled Up, or FUBARed- Fouled Up Beyond All Repair

62 UNIMOG Camper w/617 Turbo, 85 300SD daily driver- both powered by blended UCO fuels

Last edited by coachgeo; 06-14-2003 at 11:07 AM.
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  #6  
Old 06-14-2003, 11:43 AM
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Quote:
Originally posted by h2odiesel
Coach,
.... In the picture the guy has a pressure regulator in the line to the waste gate.
Just realized this. I think you are looking at my labels different than I am. I am not speaking of the hose in the picture that has the wastegate controller plumbed into it. I am aware that was what this picture "overall" is. I am speaking of what looks like a brass port plug screwed into the flat spot on the turbo elbow. It is RIGHT at the end of my red line. It sits above the rubber hose in the pic.

hmmmmm upon closer inspection of the pic I see now that maybe that is not a brass plug but a brass screw that is part of the air cleaner. Anywayyyy...... that flat spot right there on the Turbo elbow on my rig has a port. This is where my turbo boost is attached and where I was considering to use for injection purposes.

__________________
"If anyone knows other lessons I need to learn, please tell me. I'm tired of learning them the hard way".
by JerryBro


The Glow Plug Wait: This waiting period is a moment of silence to pay honor to Rudolph Diesel. The longer you own your diesel the more honor you will give him". by SD Blue

My normal daily life; either SNAFUed- Situation Normal... All Fouled Up, or FUBARed- Fouled Up Beyond All Repair

62 UNIMOG Camper w/617 Turbo, 85 300SD daily driver- both powered by blended UCO fuels

Last edited by coachgeo; 06-14-2003 at 11:49 AM.
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