Primary Downpipes and smoke/oil leakage?

[Toddasaurus]

For anyone running aftermarket primary downpipes, do you have any excess smoke out of the tailpipes when at WOT? Have you noticed oil seeping into the exhaust? If you have aftermarket primaries, please vote and post the details (ie w/HFC or catless, which brand, other notable upgrades, etc).

This has been mentioned in a couple other threads; but, I am hoping we can get a consolidation of info here. I want to know just exactly how widespread of an issue this really is.

Please vote/chime in if you've experienced this, or know of someone who has. Also, please note I'm only talking about PRIMARY downpipes. Not secondaries.

Thanks!!

 

[xot1]

I wish there was a "I don't know" or "Not to my knowledge" option.

 

[Toddasaurus]

I wish there was a "I don't know" or "Not to my knowledge" option.

Fixed! Haha.

 

[Syvino.stinger]

Fixed! Haha.

How did you fix and what exactly why the issue?

 

[MickeyDee]

Was there ever a definitive answer generated from this pole? Are there people experiencing oil seeping even with HFC primary down pipes?

 

[Stock_stinger]

Primaries have less back pressure which leads to the turbo oil seals being looser. This allows oil to bypass. Some people it's very small amount. Some people it's a ton. Some people have an exhaust after primaries that gives decent back pressure still so it's not so bad. Others are nearly straight pipes and roll coal. The turbos in these cars are decent. But no where near overbuilt. Running more than stock psi don't help either

 

[PBennett18]

So its seems like we could go catless as long as we have some catback exhaust OR just go with HFC primaries and straight pipe it after that. Is that correct? I'm also just very interested in performance and waking the exhaust up.

 

[Stock_stinger]

More or less. You could gain a bit of flow by going high flow cat but it's still a guess how good the minimal oil seals are

 

[VizioVHollow]

Hello all, I just installed catless primary pipes on my 2019 Stinger GT2 and having that same issue where a ton of oil is leaking into the exhaust and causing smoke to come out of the exhaust. Just looking for a fix action on this. From what I read in previous replies, it seems that adding additional back pressure would cause less oil to leak and rid of the smoking? I made a thread on this under StingerTSB since I didn't know about this one. My exhaust setup is catless primaries, XForce catless secondaries, XForce Resonators, MBRP Catback. I also read that high crankcase pressure can cause oil to not be able to drain back into the oil pan. I don't have any catch can on the car so maybe that would help? Any help is appreciated!

 

[Stock_stinger]

Hello all, I just installed catless primary pipes on my 2019 Stinger GT2 and having that same issue where a ton of oil is leaking into the exhaust and causing smoke to come out of the exhaust. Just looking for a fix action on this. From what I read in previous replies, it seems that adding additional back pressure would cause less oil to leak and rid of the smoking? I made a thread on this under StingerTSB since I didn't know about this one. My exhaust setup is catless primaries, XForce catless secondaries, XForce Resonators, MBRP Catback. I also read that high crankcase pressure can cause oil to not be able to drain back into the oil pan. I don't have any catch can on the car so maybe that would help? Any help is appreciated!

oil falls to the oil pan from the crankcase after it lubricates the upper engine components. catch can is for excess crankcase vapor (that is an oily steam) to keep it from getting into the engine combustion chamber where it can coat valves and cause carbon buildup. the turbo seals arent like normal rubber or flange seals. these seals use a bit of pressure from the system (the back pressure in this case) to keep the gaps tight and sealed for minimal oil loss. by adding a nearly open system, the seals will bypass. better oil if using cheap could help but its a bandaid. need some backpressure in your life

 

[VizioVHollow]

oil falls to the oil pan from the crankcase after it lubricates the upper engine components. catch can is for excess crankcase vapor (that is an oily steam) to keep it from getting into the engine combustion chamber where it can coat valves and cause carbon buildup. the turbo seals arent like normal rubber or flange seals. these seals use a bit of pressure from the system (the back pressure in this case) to keep the gaps tight and sealed for minimal oil loss. by adding a nearly open system, the seals will bypass. better oil if using cheap could help but its a bandaid. need some backpressure in your life

Okay gotcha. I already have an mbrp Catback which is just a muffler with a helmholtz can at the back, and I had two resonators welded on right before those once I started having the issue. Would having another set put on help? Thanks.

 

[Ohiocruiser]

I think i've read somewhere that installing catless primaries would eliminate the back pressure needed for proper turbo bearings seals.

 

[VizioVHollow]

I think i've read somewhere that installing catless primaries would eliminate the back pressure needed for proper turbo bearings seals.

I’ll see if having another set of resonators put on helps and update what happens. Thanks!

 

[Stock_stinger]

Okay gotcha. I already have an mbrp Catback which is just a muffler with a helmholtz can at the back, and I had two resonators welded on right before those once I started having the issue. Would having another set put on help? Thanks.

resonators wont help you as most are just a glass pack (that is a straight tube with fiber glass on the outside shell. wouldnt increase pressure.

 

[VizioVHollow]

resonators wont help you as most are just a glass pack (that is a straight tube with fiber glass on the outside shell. wouldnt increase pressure.

So what would you recommend? I don’t want to put another set of mufflers on it bc it’s already quieter than I’d like. The MBRP Catback and resonators quieted it a lot.

 

[Stock_stinger]

So what would you recommend? I don’t want to put another set of mufflers on it bc it’s already quieter than I’d like. The MBRP Catback and resonators quieted it a lot.

youre limited in options on that. catted primary or a muffler is about the only option in hopes of stopping it beyond better turbos

 

[oddball]

Keep reading up. Proper tuning for this exhaust setup can make it work. How, precisely? Shit if I know. We're getting into black magic territory here.

 

[BIG-D]

Anymore info on this @oddball ?