What flow rate did you go for ?

 

1.0 gpm.

 

and I'm getting the super buttery stuff too!

 

Happy I could assist. It's a jungle out there, and what one easily comes across, another one never find. I have often been missing a general friendly tone in these cases, but it luckily seems to improve, so I must follow up

It wont be this that breaks the bank I would test it with close to zero pressure and into a bucket to verify its NO. If NO valve fail, you will far more likely keep your turbo as it will be normally stuck in open.

 

So ideas for testing strategies?

 

Very interesting information, I would love to see what your results are as well. I believe it was my oil press that killed my first turbo as well

 

How much oil does the engine move?

 

The pressure is high but the flow is a much harder measurement and i'm doubtful its known. It could have 200 pounds of pressure and very little flow. Also the oil flow through a AN4 line to the turbo may be different then the oil flow through the oil coolers or other ancillary systems.

My greatest worry in the endeavor is that a unit to drop enough pressure will restrict to much flow.

 

9k u done yet?

 

My thought is the oil pump displacement can't be much. At high engine speeds 1GPM shouldn't be a problem, but at low rpm, is it going to starve the bearings and rotors?

 

I have been working on other stuff but I have worked out the hardware needed. Or so I think anyway.

http://www.flickr.com/photos/9krpmrx8/12281264474/

 

they changed the oil pressure in the S2 for a reason...(maybe) but really who knows what the actual flow rates are. One can assume that the flow rates increased with the pressure since it can be hard to change one without the other. Not sure what you are trying to say here or how it relates to the thread. The only internal bearing failures i have seen are from shitty oil combined with an over tight belt adjustment setting.

 

Yes as flow increases so does pressure and the inverse.

We already have low flow at idle up to around 2000 RPM. That is why the pressure is low down in that rpm range.

If you take 1 gpm away from already low flow it could be a problem.

I would watch your engine oil pressure very close it may go very low with that much flow to the turbo.

 

This talk of low oil pressure has me baffled. I seldomly see my pressure below 40 PSI. 18 PSI at idle and easily 70 when I'm bearing down hard.

My (extremely) cold start up pressure is even worse. I'm certain I do more damage on cold startup than I do ***** to the wall.

 

Well we are not in agreement. A guy could have tons of pressure and very little flow. Your statement was my first time reading about the 8 not flowing enough oil. I would be interested in knowing how you came to this conclusion.

 

Low flow? 2000psi? I don't follow.

 

replace psi with rpm and it forms a syntactically correct sentence.

 

Oh, well I am unaware of any low pressure or low flow issues at idle or up to 2,000RPM so I'm not sure where he is getting that from.

But I pulled apart my car and I have oil dripping out of the hot side of my turbo so I would say it is burnt,

 

It didn't say it was logical LOL

 

ok I fixed it to say PSI, that was just a typo

I never said it does not flow enough oil!

BY low flow, I mean we have a mechanical pump. When it's turning slow it moves less fluid. As it's speed goes up so does the volume of fluid it displaces.

So at very low engine speeds the flow is at it's lowest, due to the pump moving at it's slowest speeds.

Does the pump flow 1 GPM at IDLE? Does the pump flow 10 GPM at IDLE? I don't know. But if it flows 1 GPM at IDLE and you bypass 1 GPM to the turbo then you have 0GPM at IDLE. it could be a big concern.

 

Sounds logical to me. Oil pump is putting out a certain amount of oil each round. Cavities that need filling is more or less the same, and on top of that i believe internal leak pr round(in pump) is increasing when RPM is dropping

If you have a higher flow pump, you will generate more heat at higher RPM, as energy is transferred into heat when relief valve is letting oil pass through. Power is pressure times flow times a constant.
Some googling later:
Heat energy(Horsepower) = Pressure (PSIG) × Flow (GPM)/ 1714

 

I see your point poo. I am not sure, I wonder if our oil pump is the same as what the factory turbo FC and FD run? I thought it was. If it is then I would say it's a non issue since the same pump would have fed two turbos on the 13B-REW and one similar sized turbo on the 13BT.

 

good point, I've seen a bunch old posts about it being the same. ASH8 seams sure they're the same as some older pumps.

 

It was found to help stabilize the (poorly balanced) rotors at high rpm, not all the other BS fantasy theories posted on the forum

 

Interesting.

https://www.rx8club.com/series-i-tec...3b-msp-171123/