s2kguy17

iTrader: (5)

So I have been having crazy issues with smoke on my car. So let me start from what I have done and my mods.

Mods list:
Precision turbo 5862
street port motor, rebuilt by local rotary enthusiast(atkins seals)
550c primary 1000cc seconds
Bigger SMIC

So I thought it was my turbo since I bought it used it and got it rebuilt by Boostlab here in tampa bay area. They did say the rear seal was bad so I got the rebuilt.

Put it on the car and it wasnt smoking for awhile then started too again, I took the turbo feed line off and re route it, and really didnt change much but I am sure it needs a while to burn the smoke in the muffler. I have a catch can and capped the top nipple and attached a line to the second one on the bottom.

Car still smokes so nothing changed there also I did notice oil is going in the turbo manifold and burning since some from burning is coming out of the engine bay. So one thing I did try the other day is run the car in idle with no oil cap for awhile and I didnt see any more smoke from the engine bay and oil stop going in the turbo manifold as I can tell, but still some smoke out the exhaust.

So should I put a bigger catch can, tap the line on the oil filler cap, and also attach both nipples to the catch can? Will this stop the issue? Car sounds perfect and drives decent in vac but another problem will not pass 0 vac to +1lb boost at all.

Mahjik

iTrader: (1)

Are you using a restrictor for the oil line to the turbo? Most turbos require a restrictor for oil systems that see pressures over 80 PSI.

s2kguy17

iTrader: (5)

Yes, I am.

Mahjik

iTrader: (1)

Have you talked with Precision? It's possible the restrictor you are using isn't enough. The restriction will be based on your line size (so if you are using a larger AN line, you may require a larger restrictor).

s2kguy17

iTrader: (5)

H4 line and i actually have the smallest restrictor and plus a second one as in the lines. Its not starving the turbo.

Mahjik

iTrader: (1)

Sounds like you have two problems which likely aren't related:

1. Excess smoke
2. Not able to transition into boost


For the first one; yes, the car should not be smoking if everything is working properly. Likely, there is either an issue with the turbo rebuild or the delivery is overpowering the turbo oil seals. If you have confirmed with Precision that your currently line size & restriction is appropriate, then you likely have a junk rebuild. But you should confirm with Precision first (and from what I've seen in the past they have been very responsive).

As for your second problem, are you using the stock MAP sensor or aftermarket? What ECU are you using?

s2kguy17

iTrader: (5)

PFC with stock map sensor.

I will contact precision today, I am also going to attach a bigger catch can to my filler cap and see if that helps.

Mahjik

iTrader: (1)

Catch can shouldn't do anything for smoking. The catch can is typically routed from your crankcase ventilation system. It's in effect when the oil is pushed up through the venting system and allows the oil to be trapped rather than into the intake track. Also, what oil pressure are you seeing at idle and what weight oil are you using?


As for the PFC, you should be able to use the diagnostic screen to validate the following are working as expected:

MAP
TPS
CAS

Problems in those areas can result in symptoms as you are seeing with the car falling on it's face when trying to go into boost. I'm assuming you made some adjustments for the 1000cc secondaries?

IRPerformance

iTrader: (41)

Pull the turbo and run the car with no exhaust manifold for a few seconds and see if it still smokes. Just make sure to cap the coolant lines and route the oil feed back into the oil cap. Don't catch anything on fire.

s2kguy17

iTrader: (5)

Well the reason I am doing the catch can is to help with the pressure since when I took the oil cap off it seem to die down and not push oil into the manifold making it smoke from oil burning. That actually helped a lot but of course still smokes so I am hoping that's my problem and it just needs to burn off.

arghx

iTrader: (3)

If you have the oil filler pcv line going to a catch can you shouldn't be getting excess crankcase pressure in the conditions you describe.

Kakashi07

iTrader: (3)

Check your oil metering system. The bleed valves most commonly referred to as the "oil injectors" actually have check valves integrated in them and sometimes get clogged and don't do so well. In fact on stock TT setups its pulls oil back into the primary turbo inlet. Also the OMP ,very rarely, can fail and it fails safe open to ensure you don't oil starve the motor. I was burning alot of oil especially bad on decel which seemed odd to me being I have been running single for a long time. I opted to eliminate the OMP system and run premix and the smoking issue went away.

s2kguy17

iTrader: (5)

I dont have an OMP and the oil injectors holes are capped, I also premix. I just turn on the car yesterday and its spitting out oil threw the exhaust and all over my plugs which are making them go bad quickly. So now I am guessing my Oil control rings are bad?

s2kguy17

iTrader: (5)

spark plugs for reference, the last three of pics of the rear rotor , the first 2 pics are one of the front rotors. I forgot to take a pic of the other plug buts its the same.

Radial GT

iTrader: (16)

Were you involved with the rebuild at all? Did you port this engine?

For oil control rings to leak that much oil something went really bad with the rebuild. Possibilities include; ported into the oil control ring tracks, oil control ring springs worn out, oil control rings worn out/broken, cut O-rings on the oil control rings, missing oil control O-rings during install...

Of course all of this is very hard to troubleshoot with the engine assembled.

s2kguy17

iTrader: (5)

Yup, it was rebuilt locally but the guy went back to puerto ricon :/ Go figure. I was told the exact same thing yesterday about the port going into were the oil control rings are. I am pulling it out tonight and will post pictures. Took the waste gate off (external) dripped with oil.

s2kguy17

iTrader: (5)

Well here are some pictures of the rear rotor and irons. The engine all looks good besides the oil being in the chamber. Seals look in great Shape no bad wear on the housing or iron that I can see.

The port job isnt 100% best but, I am guessing best way to see if it is too big is to by templates and see if they went over. And suggestions would help.

RX7WEEE

iTrader: (16)

Its hard to tell from the pics but the 2nd pic, that port looks pretty close, if not too close to the oil control ring path. Try to get some better pics of it. If that is the case it could be causing the smoking issue.

s2kguy17

iTrader: (5)

Had my brother take some more pictures since I am not home.

RX7WEEE

iTrader: (16)

Those look better. From what I can tell it doesn't look like it's as close as I thought.

Why did you pull the engine and break it down?

s2kguy17

iTrader: (5)

Lots of oil coming out the exhuast, wastegate, and inside the rear exhaust port was filled with oil.

RX7WEEE

iTrader: (16)

That still doesn't explain why you pulled it out and apart. (not trying to be rude) Did you figure out if the turbo was okay?

Seems like you just pulled it out and apart for what might be an unrelated reason. It very well could be a bad rebuild on the turbo.

Have you checked side seal gaps? Did the oil control rings look okay?

s2kguy17

iTrader: (5)

Took the turbo back for warranty and it checked out perfect no problems. So I wanted to take the engine apart and see what was going on and a couple things, rotors need new oil control rings and bearings. Everything else besides the rotors check out fine.

Getting all that done tomorrow and back together it goes.

RX7WEEE

iTrader: (16)

What was wrong with the oil control rings?

s2kguy17

iTrader: (5)

The O rings it self were Flat and not round at all compared to the new ones I just got. Everything is getting balanced next week with new bearings, oil control rings and gaskets. Hopefully that will help.