M50 turbo build

[Thompson501]

Thanks, I am enjoying it.

- - - Updated - - -

Have you started a build?

[Thompson501]

Wondering if my boost controller is not working correctly, adjusted the settings according to manual and is still not reading increased pressures
On another note, seeing quite a bit of smoke one slowing down at the traffic light. I have a more restricted fitting for the oil feed, I'm wondering if I should go with that fitting and see if that slows down the smoke? What do you guys think?

[328iFun]

Wondering if my boost controller is not working correctly, adjusted the settings according to manual and is still not reading increased pressures
On another note, seeing quite a bit of smoke one slowing down at the traffic light. I have a more restricted fitting for the oil feed, I'm wondering if I should go with that fitting and see if that slows down the smoke? What do you guys think?

Does the controller have over boost correction? Did you adjust it as well?

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[Thompson501]

I adjusted all settings, I need to do some trouble shooting

after boosting, when coming to a light, quit a bit of smoke

should I change the turbo oil feed fitting to one with a smaller inside diameter to restrict some oil?

[328iFun]

I adjusted all settings, I need to do some trouble shooting

after boosting, when coming to a light, quit a bit of smoke

should I change the turbo oil feed fitting to one with a smaller inside diameter to restrict some oil?

Is a ball bearing turbo?

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[328iFun]

I adjusted all settings, I need to do some trouble shooting

after boosting, when coming to a light, quit a bit of smoke

should I change the turbo oil feed fitting to one with a smaller inside diameter to restrict some oil?

Is it a ball bearing turbo?

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[328iFun]

If it's journal bearing it should not need a restrictor. Unless the manufacture says otherwise but from what I've read JB chras love oil.

I would suspect the issue is with your oil drain setup. Under increased engine PSI the oil is backing up in the turbo and blowing out the exhaust. Could be that the drain line is too small in diameter, clogged, or the turbo that the turbo isn't clocked corrected.

I've also read some blow by is normal but excessive is not

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[Thompson501]

It is a journal bearing Percision turbo
drain is an10 to a an8 fitting/ drain plug adapter
I'm gonna review this evening and take some pictures I believe the turbo is clock properly to drain straight out the bottom. The hose routing looks good as well.
I have a couple of different fittings for the feed of the turbo for oil. I'll take some pictures of the different ones and see what feedback I get

[someguy2800]

What did you do with the crank case vent?

[Thompson501]

That's the vent from the valve cover correct?
open to ground

[someguy2800]

Correct. I've never had a problem with mine just having a hose going to a filter but the crankcase pressure might be too high causing it to push oil through the seals on the turbo under deceleration.

[Thompson501]

i'll upload pictures of the different fittings for the oil feed later on, I believe that might help, my tuner mentioned it might be necessary but to run it first

On another note, I think I might hook up the manual boost controller this evening with a boost gauge and see what's happening. I'm wondering if the cell annoyed on this electronic boost controller is not working properly because I'm not able to increase boost.
I hear it all going out the wastegate/open dump, lol

[Thompson501]

52026963096__47562D9F-3787-41F6-91DD-1E6F1BEEBFFD.jpgIMG_0850.jpgDo you think the one in my wife's hand is ok?
The one that's on the turbo now had a larger inside diameter

[someguy2800]

Thats a pretty big hole in there. Looks like a regular -4 an fitting? You can usually restrict down to about .060-.080" on a journal bearing turbo.

[328iFun]

I might restrict my 6262 if that's the case.

However, I only have blow by on cold start when the scavenge pump isn't run long enough after shutdown

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[Thompson501]

Do you know where I can purchase that fitting that has more restriction as per the specs you stated?

[someguy2800]

Something like these. You can drill them out to whatever diameter you want.

http://www.jegs.com/i/Vibrant-Perfor...10289/10002/-1

http://www.ebay.com/itm/4-AN-x-1-8-N...3D111632092082

Precision recommends no feed restrictor on a journal bearing turbo unless the smoking cannot be stopped. If one does need to be used they say to start at .090" and no smaller than .065"

http://www.precisionturbo.net/tech/P...mendations.pdf

[NOTORIOUS VR]

I think it's the OP's drain.. -8 isn't big enough... really it needs to be a min -10 all the way through... -12 is probably better yet.

But thanks for linking the Vibrant adjustable restrictor Perry... didn't know they made them.. I wanna restrict my 40R slightly.

[Butters Stoch]

If this is a precision turbo, vent the drain. 3/8 or better yet 1/2 vent line up to catch can

[Butters Stoch]

It is a journal bearing Percision turbo
drain is an10 to a an8 fitting/ drain plug adapter

This will not cut it.
If you don't want to remove the pan and have a 10AN bung welded on, or if you don't want to install a pump, then you need to open up that drain plug hole and tap it 1/2 NPT, this will allow enough drain. You will also want to vent the drain line. Mike R built boxes back in the day, you can find some online out there, or you can simply cut the drain line, put in a 3 way T and vent it up to to catch can. The oil will never actually flow up that far, but it gives it a place to go when its backed up.
Your currently flowing the oil into oil. So its not ideal. With the vent, when pressure rises and oil gets backed up, it will travel up the vent line a little and back down when off throttle. I have had to do this with 3 builds to stop the smoking when running into the pan.

[someguy2800]

Butters were those top mount setups that you had to do that on?

[328iFun]

I honestly don't see why top mount can't drain to one of the vanos bolts with a proper fitting... I know I've said this several times

Op could drain to dip stick ccv tube, mine seems to be working well

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[Thompson501]

image.jpgIMG_0858.jpgFirst pick image.jpg s what I'm currently running second pic I think I'll give it a shot it's obviously much smaller.ill Tried that before I go further
The piece I would like to try in the second and third picture came in a kit that I had ordered online oil feed oil drain combo. Do you think it safe to try this?

[Butters Stoch]

Butters were those top mount setups that you had to do that on?

Oh shit, nope .
No experience with that, but regardless, going through the drain plug won't work with a precision. Too small, especially a JB. Tons of oil ripping through those.

[328iFun]

Oh shit, nope .
No experience with that, but regardless, going through the drain plug won't work with a precision. Too small, especially a JB. Tons of oil ripping through those.

I took my oil drain off and ran it to a can briefly, there is a ton of oil that moves through these things.

That turbo inlet looks too tiny to me. I think you need to rethink where the problem is coming from. The turbo wants the oil, your drain setup is where I would start. Oil is backing up the drain line under higher PSI and into turbo exhaust

If you want to run to the stock drain plug you may need to run a scavenge pump to push oil against oil. Might be able to get away with oil dipstick tube without scavenge, I run one. To dipstick tube, I only have smoke if I don't run the pump after shutdown


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