Calling all MS3 Owners with smoking Turbos...
- Thread starter AutoXRacer
- Start date
mazdaspeed32007
Member
- :
- Mazdaspeed3
so speedy3...if i cut out the first cat also why the flow test? im not sure i really thought it would matter if you ran anything on the opposite end of a turbo motor because back pressure isnt its best friend....to some extent. what would i be looking for exactly then?
I'm not sure I understand your question. Are you partying and posting at the same time? You east coasters party too much! Just kidding, but I really don't know what you are asking.....
mazdaspeed32007
Member
- :
- Mazdaspeed3
i mean in the flow test. what would i be looking for? what would be he purpose of the flow test if all im looking for is HP and TQ in the end? does it have to do with combustion or something?
Ah, i'm a dumbass, I had to go back and read what I wrote before. What I was trying to say is if you were going to reuse the stock cat but cut it out and weld it to a 3" pipe, you will see gains but not sure if the stock cat can support the flow. But, if i misunderstood what you're planning to do, then nevermind. I know for a fact that the 2nd cat is a big restriction. I also know the first cat is too. The whole stock exhaust is 2.25" so it too is a restriction. I am using my friends stock mid pipe (pipe section with 2nd cat) with the cat gutted out; just put it on this weekend and man it made a HUGE difference. This whole smoking turbo issue is a mess though. You won't know for sure if it's leaking oil until you go full open exhaust without the stock cats. You can check your intercooler hose after the turbo for oil, but I think that the problem is in the exhaust side of the turbo. My initial thoughts are that the oil builds up in the bearing cavity right before the exhaust turbine wheel and leaks out during idle when there is no back pressure. I think this build up is more pronounced with reduced back-pressure on the exhaust turbine. Axial forces on the turbo are an issue and Borg-Warner designed the turbo with that in mind, but they also had to design a turbo to run up to 1050 deg celcius and high RPMs, so they had to design a complicated bearing system that can be comprimised. Many factors, i think, can contribute to this like excessive bearing wear from bad oil, running hard before its warm, and again axial forces that it's not designed for. This may be completely wrong and they simply had a bad batch of turbos. For me, though this is hard to believe since there are 2008 MS3's with smoking turbos and my friend has gone through 2 turbos and his third is smoking. Bad batch or bad design?
I don't know if I answered your question, but I'll tell you this: This car has a lot more potential than it comes stock. Just openning up the exhaust and intake flow is yielding 50-70 whp even with a smoking turbo!
MS3 Ventura
Member
I've got a 2007, 12K miles, PG race pipe, MS CAI, ATP turbo inlet pipe, 3.25" ETS TMIC, MS CBE. A friend riding behind me noticed that I blew out dark smoke when accelerating hard in 5th gear, starting at 70mph. I know I'm burning rich because of my tail pipe soot. Have others experienced this as well?
That's normal!
AutoXRacer
Member
Yeah, mine does that also...thats normal.
MS3 Ventura
Member
Good to know it's normal. I guess I always have the option to return it to the stock set-up to hide the problem... but if my turbo seals are shot, I'd like to get that fixed.
Even if the turbo seals are good, will our cars still blow out some black smoke on hard acceleration?
Even if the turbo seals are good, will our cars still blow out some black smoke on hard acceleration?
AutoXRacer
Member
Yes, all cars do it... Its just fuel, unburnt fuel... Don't worry about it, its perfectally normal.
Just worry about white-ish/blue-ish thick smoke.
Great info, the only thing I dont get is what happen with me completely goes against this. I would always allow my car to warm up properly, I would let it cool down properly, and I would do the oil every 3K. I didnt have an aftermarket exhuast or intercooler so no pressure change. Im not sure, I truely think that there is no way for us to control this issue, if its going to happen it will happen, if its got good seals then it wont happen. However using the steps above should certainly add life to your turbo and car in general. (2thumbs)
ps.. how did the list turn out, are you still working on it?
also, for another member that asked if I have a warranty after my turbo was replaced. YES, I still have my full warranty and extended warranty as long as I keep it stock. I think Im going to be getting some mazdaspeed parts when i get some cash though, Stocks no fun
I also wouldnt mind removing a cat and the muffler...(ricer)
Last edited:
I'm a little confused by #3. How is oil not flowing into the turbo as soon as the engine is running? Warming up isn't a prerequisite for that.
Some people start their car and just go with cool oil flowing to the turbo. The bearings have such a tight clearance, that the cold oil isn't viscous enough to lubricate the bearings. Letting the oil warm up will ensure that the oil will flow through the brass sleeves inside and out.
mazdaspeed32007
Member
- :
- Mazdaspeed3
so far with all the stock exhaust i havent seen any sign of a "smoking turbo" i get the normal black soot so far and when i replaced my plugs they had no white so i know that im not burning any oil as far as i know so far. so i guess ill just gut the first cat or something an only have my mini cat midway. that will be it. well....megan CF muffler also. (hks knock off sort of...same thing basically) but we'll see when the time comes. i didnt see any oil or anything near botjh intercooler pipes or as far as my fingers could go. but like speedy3 said....its probably exhaust side unless its just blowby. idk....******* s**** horribly gay. i just hope in a month when i get my TBE on i wont have to deal with a "bad batch of turbos". ill keep yall posted.
I had a custom turbo back exhaust installed about a month after I bought my MS3. Not too long after that, I had the smoking problem at idle. I took it into the dealership (with the custom exhaust still on it.) They told me that some of the turbos were having problems. They replaced mine with no questions asked about my aftermarket exhaust system. Since the replacement, I have put another 7,000 miles on the car. No more smoke problems. I will keep you posted if that changes.
Much later on. I did install Corksport Turbo Back Exhaust. On 3 weeks and have beat it silly. No oil smoke > Just more power . Needs to be tuned now. My not smoking baby snail K will be available to a brother who is denied warranty unjustly by the end of summer if all goes well. Right now I am two weeks behind schedule.
How much for the baby snail k?
mazdaspeed32007
Member
- :
- Mazdaspeed3
if you dont mind me asking...can you take a snap shot of your custom IC sprayer....im intrigued....
blacksheepms3
Member
- :
- Mazdaspeed 3
what?! ur lucky, do u mind tellin us where the dealer is? just the city and state, i wanna know if it's my dealer. u got one cool mod-friendly dealer
mazdaspeed32007
Member
- :
- Mazdaspeed3
they do the same thing at the dealer in shrewsbury MA. the dealer didnt void my buddies speed6 and he had a SSQ bov, custom TBE with deleted cats and resonators, CAI, gauges tapped into factory wires, and a few other things....they didnt give a **** at all....they only voided his warranty when he put on the FMIC because it was to big of an engine part. they said he changed a MAJOR engine component. otherwise they dont care here either.
actually if i remember correctly they called out the sales manager and he said it was awesome. lol.
actually if i remember correctly they called out the sales manager and he said it was awesome. lol.
New Threads and Articles
-
2007~2015 A/C draining direct to passenger footwell - too much pressure used to clear last time
- Started by jase7678
- Replies: 0
-
Need 2017 CX-9 Stereo wiring diagram for non bose 28 pin connector
- Started by djnixon
- Replies: 0
-
