Oil Psi @ turbo, help me make a device

[dsm-onster]

There's very few ways to find clogged ports without knowing pressures relavent to spec. It doesn't take alot of gunk to alter oil flow to the head. Also, we buy these motors with several head resurface jobs done to the head. This has a significant affect on the minimum port area to the head. As well, a sticky oil relief valve or a weakened spring has nothing to do with the quality of the build, but does alter perameters that certain components see. and thus, it can be beneficial to know what these perameters are directly. . . Instead of saying 'hey, this 500 lbs of thousands of different interacting systems are jsut going to function just right. No need to check in as many points as possible.'

Glad you will stop this "with me", considering this isn't my thread. This guy has fairly good reason to wonder what his oil pressure is at the turbo. It's an important aspect to turbo longevity. Good-bye, if all you're here to do is say it's 'idiotic' take steps to quench your concern, . . . because of possible leaks? Come on. I'm sure he knows how to choose sealing fittings and tighten them.

 

[Calan]

Thanks for the link, I'll have to check that stuff out for when I need to see what my oil pressure is before putting on my new turbo. Especially after my relief valve port job.

Yeah...those things are great to have in the toolbox. I have a couple of the -6AN versions. Used one to measure my CC pressure off the VC when testing catch can effectiveness. I'll be picking up the one I linked to in order to measure the oil pressure at the head before going with an HX35. With the ported OFH and no balance shafts, there's no telling what pressure I'm seeing now.

Never hurts to be sure

 

[matt98eclipse]

I'm not sure how this guy's question about measuring the oil pressure turned into a debate about where to oil a turbo from, but anyway...

OP: if you are using a -4AN line, you can use a straight inline gauge port adapter. There are many available, but here's one example from Summit:

Russell Performance 670290 - Russell AN Flare Unions and Caps - Overview - SummitRacing.com

Thanks bud this is all i needed! This piece should work perfect to see what my oil pressure from the head is feeding into my turbo. Ill mount this fitting right at the turbo to see exactly what my oil pressure is.

WOW guys didnt meant to start a big argument .

 

[9!'clipseDOHC]

Good information calan! I just tagged your posts as helpful, hopefully the moderators will see fit to give you some rep points for staying on track and answering the op's questions. Thats what this site is (should be) all about.

 

[LiquidX]

Yeah...those things are great to have in the toolbox. I have a couple of the -6AN versions. Used one to measure my CC pressure off the VC when testing catch can effectiveness. I'll be picking up the one I linked to in order to measure the oil pressure at the head before going with an HX35. With the ported OFH and no balance shafts, there's no telling what pressure I'm seeing now.

Never hurts to be sure

Thats exactly what I'm doing except I'll be using an HX40. Not sure if I want to use the head or OFH

Thanks bud this is all i needed! This piece should work perfect to see what my oil pressure from the head is feeding into my turbo. Ill mount this fitting right at the turbo to see exactly what my oil pressure is.

WOW guys didnt meant to start a big argument .

Matt, you didn't cause anything to happen and neither did the OP so don't blame yourself (if you are) for the fiasco that happened here. You should always know what pressure you are running when you put a new turbo on. Don't want to have it too high or too low for the sake of the turbo.

 

[dsmfa9nutter]

Glad you will stop this "with me", considering this isn't my thread. This guy has fairly good reason to wonder what his oil pressure is at the turbo. It's an important aspect to turbo longevity. Good-bye, if all you're here to do is say it's 'idiotic' take steps to quench your concern, . . . because of possible leaks? Come on. I'm sure he knows how to choose sealing fittings and tighten them.

You can just stop already, your lack of knowledge will end up hurting somebody someday. Wish I'd be there to say I told you so.

If you children were really interested in finding out what the psi was going to the turbo, you COULD put a gauge into the hole in the head and read it.

 

[PieEyedPiper]

You can just stop already, your lack of knowledge will end up hurting somebody someday. Wish I'd be there to say I told you so.

If you children were really interested in finding out what the psi was going to the turbo, you COULD put a gauge into the hole in the head and read it.

Aren't you the one promoting "lack of knowledge"? You know, with your "oil pressure is automatically fine, no need to check" opinion?

These guys just want to monitor oil pressure. Let them.

 

[dsm-onster]

Everone. You need to check your oil at the oil INLET; not at the head, which would be pointless. The line changes pressure, especially going through TWO banjo fittings. As well, many times it can be partly clogged without one knowing it. Turbo manufacturers state pressure requirements based on proper drain size and a pressure reading at the oil INLET.

I'm sure not checking it would save you from getting hurt someday though

 

[LiquidX]

Everone. You need to check your oil at the oil INLET; not at the head, which would be pointless. The line changes pressure, especially going through TWO banjo fittings. As well, many times it can be partly clogged without one knowing it. Turbo manufacturers state pressure requirements based on proper drain size and a pressure reading at the oil INLET.

I'm sure not checking it would save you from getting hurt someday though

+1

Pressure can change while the flow remains the same.

[--] = banjo bolt/restrictor
100psi==[--]===[--]===]50psi


Use the above for example. Oil enters the tubing at 100psi traveling through the small tube, it encounters a restriction (banjo fitting). Pressure builds behind the restriction as a limited amount of oil is allowed to pass through which in turn lowers the pressure.

Pressure is now dopped in the center line and flowing into the next fitting at 75psi. It to is restriced and causes a constant pressure before that line. Oil passes through at a now lower pressure. At the end, the oil is now at 50psi instead of the orginal 100psi just because of 2 restrictions in the line.

Oil will pass through a uniformed sized line with restrictions without altering much of the flow. That is how a venturi works. If you goto a much larger line, flow will change however and line size will alter pressure as well.

That's the reason why you check at the inlet for the turbo you are running. To see what the overall pressure at the OFH or the head, you would tap there to see said pressure. However, it's not to be used to judge what your turbo inlet pressure is as DSM-Onster said.

 

[9!'clipseDOHC]

Here is a quote from RRE:
Click for a LARGE image of why the oil supply is better down at the oil filter housing.
Stock, the turbo oil supply is just about the last oil in the whole motor. If you get it at the oil filter housing, you get oil fresh out of the filter.

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The whole article.

 

[matt98eclipse]

OK guys i went ahead and order the fitting below and will be installing it right at the INLET of the turbo. I really wanna make sure im within holset oiling requirements. I really dont want to kill this turbo being alot of it is custom and has cost me a decent amount of money. Ill let you guys know how it goes after its all installed.

Russell Performance 670290 - Russell AN Flare Unions and Caps - Overview - SummitRacing.com

 

[matt98eclipse]

Ok guys i got the fitting in today and installed it. Now i just need to finish installing my trans to start the car up and see what type of oil readings i get.

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[dsm-onster]

Remember, you can freerev in the driveway. Rev to where you start getting boost. Must be 30psi or more. Idle mist be 10psi. Rev to redline. Must not exceed 72psi. . . All this while warmed up to engine operating temp.

 

[matt98eclipse]

Thanks matt, ill post back and let you guys know what my readings are.

 

[LiquidX]

Looks good, make sure you don'thave any leaks . I'm not sure if Matt said it, but check the cold start oil pressure as well. Cold start shouldn't exceed 88psi and warm is at the 72psi

 

[matt98eclipse]

Looks good, make sure you don'thave any leaks . I'm not sure if Matt said it, but check the cold start oil pressure as well. Cold start shouldn't exceed 88psi and warm is at the 72psi

Thanks for the info as well. I wont be able to start the car till sometime mid week. I really doubt ill see 88 psi at the turbo on a cold start cause i know on my mechanical gauge taped in at the OFH i see about the if not just a little more. so i should be good there.