CEL-less Turbo-back exhaust 2013 2.0T - Hyundai Genesis Forum
 
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post #1 of 14 Old 06-24-2019 Thread Starter
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CEL-less Turbo-back exhaust 2013 2.0T

I know this has been beat to death, and for asking again I apologize, but I can't seem to find what I'm after.

I live in Indiana and have an ISR cat-back. I'd like to go turbo-back, but don't want to have to tune out a CEL or smell like **** due to going cat-less. I'd like to go with high-flow cats, but can't figure out what my setup should be. It doesn't help that I can't seem to get all the components straight. A full turbo-back exhaust would be:

02 housing --> downpipe --> test pipe --> catback. Right? Or do I not need a downpipe if I have an 02 housing? The test pipe eliminates the secondary cat, so I'd need a downpipe with a high-flow cat or a separate high-flow cat. Do any aftermarket 02 housings, downpipes with high-flow cats, or high-flow cats by themselves exist that won't trigger a CEL? I'm just generally confused by all the options and am not even sure there are any options that tick all my boxes.

Edit: To throw a wrench in, I'd like to be able to use whatever I get on an upgraded turbo as well, like the tomei MX7960 from SFR.

Any help is appreciated!

2013 2.0T Base 6mt
SFR Custom Stage 1.5 tune
Injen SRI
TurboXS Downpipe/ISR Street Cat-Back
Synapse cold side BOV kit
Uniq Strut Bar
Eibach Lowering Springs
Tros Throttle Controller
Dual Catch Cans
~ 290/312 WHP/TQ

Last edited by davidsta; 06-24-2019 at 07:18 PM.
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post #2 of 14 Old 06-25-2019
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The CEL will have to be tuned out almost always regardless if you have a turbo back exhaust. BTW that's a straight pipe from the turbo to BACK tip. Sometimes 1 piece maybe 2. No test pipes or this or that. Wanting a turbo upgrade like that will probably be best if you have a standalone ECU anyway. I'd suggest first figuring out your goals then research. Then research some more and calculate costs. Then decide if it's worth it. Give this a 20 minute read, should help a bit.

https://www.google.com/amp/s/www.gen...d.html%3famp=1
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post #3 of 14 Old 06-25-2019 Thread Starter
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I figured I'd need to tune out the CEL, that's not as big a deal as not having to deal with the smell. I've lived in that thread since I bought the car and joined this forum in '13 but still don't quite understand what aftermarket components exactly I'd need to replace the stock exhaust. I've been told by a vendor the CP-E downpipe replaces the 02 housing, downpipe, and 2nd cat with a high-flow cat, which is all I'd need for a full full turbo-back.

My tune is technically setup for a turbo-back, I just hadn't gotten around to getting one yet.

2013 2.0T Base 6mt
SFR Custom Stage 1.5 tune
Injen SRI
TurboXS Downpipe/ISR Street Cat-Back
Synapse cold side BOV kit
Uniq Strut Bar
Eibach Lowering Springs
Tros Throttle Controller
Dual Catch Cans
~ 290/312 WHP/TQ
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post #4 of 14 Old 06-27-2019
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First of all yes you are right the sequence is the following, O2 housing, Dp, Test pipe, Cbe. What Jayoutterbridge said is correct and makes sense see exactly how far you want to go with the car as far as upgrades are concerned that way you don't spend money twice! Cpe is one of the only vendors I've seen besides ultimate performance that sells a catted o2 housing which ain't cheap. Do you have emissions where you're located? If not I would just go with a regular o2 housing non catted. Btw I highly recommend the TurboXs Stealth back system which consists of the o2 housing and Dp which eliminates the need for a test pipe, just add your Cbe of your choice and now you have a full Tbe! The whole system is TIG welded and stainless steel I have it on my car and it's awesome!
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post #5 of 14 Old 06-28-2019
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I don't get much smell. Got a tune and no cats, straight through exhaust. A lot depends on the efficiency of the tune when in closed loop. My last tank of gas I got 36 mpg. It just keeps getting better after the timing chain change.

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post #6 of 14 Old 06-28-2019
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That's good to hear Red, I also forgot to mention that I have no fumes whatsoever, I'm running full turbo back exhaust with a Prw stage 1 tune also getting great mpg as well. You still running the Br tune?
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post #7 of 14 Old 06-28-2019
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yes but it got updated when I switched to the black 550 FIs over the blue 550 injectors

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post #8 of 14 Old 07-31-2019
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I'm fully catless 3" turbo back. My car wreaks of fumes but I love it. Your car is going to smell like gas with or without a tune. I just recently put on a catless O2 housing, no CEL so far (it will come on in due time), but it stinks and its LOUD.

The O2 housing is the most restrictive part of these exhausts. You won't really notice any gains til it's gone. Just up to you if you can deal with it. I know there was a high flow catted O2 housing for bk1, haven't seen one for bk2. I'm almost FBO and before the O2 housing the gains were minimal, as soon as I put it on my butt-dyno felt the gains and you build boost MUCH faster, even on stock tune.

In your case, I'd definitely recommend getting a 3" catless downpipe (will replace stock DP + secondary cat), then decide if you want the O2 housing after.
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post #9 of 14 Old 07-31-2019 Thread Starter
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Originally Posted by juddy View Post
In your case, I'd definitely recommend getting a 3" catless downpipe (will replace stock DP + secondary cat), then decide if you want the O2 housing after.
Good call, cause that's what I did! I went with the TurboXS racepipe to my ISR street catback. I'm glad I didn't get a catless o2 housing because it's already almost too loud with just the street exhaust and racepipe. Absolutely no smell with the 2nd cat eliminated though.

2013 2.0T Base 6mt
SFR Custom Stage 1.5 tune
Injen SRI
TurboXS Downpipe/ISR Street Cat-Back
Synapse cold side BOV kit
Uniq Strut Bar
Eibach Lowering Springs
Tros Throttle Controller
Dual Catch Cans
~ 290/312 WHP/TQ
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post #10 of 14 Old 07-31-2019
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Originally Posted by davidsta View Post
Good call, cause that's what I did! I went with the TurboXS racepipe to my ISR street catback. I'm glad I didn't get a catless o2 housing because it's already almost too loud with just the street exhaust and racepipe. Absolutely no smell with the 2nd cat eliminated though.
I can confirm that there was no smell with the secondary cat deleted. Also sounded awesome being 3" back from there. I honestly liked how this sounded over having the catless O2 housing in place, however if you want the most out of your exhaust and turbo that restrictive cat needs to go lol. Happy modding fellas.
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You can also get a wide band that can also send out a narrow band signal to spoof the ECU for the rear O2. Someone has done it here. Good idea if you have to get emissions and still want to go catless.

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post #12 of 14 Old 08-01-2019
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Are there any tunes out there that completely bypass the CEL? I have the SFR tune that turns off the cat efficiency (bypass P0420 code) but readiness will not set when doing the emissions testing which results in a hard FAIL. This is the only reason I have to leave this darn restricted o2 housing in......

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Originally Posted by Red Raspberry View Post
You can also get a wide band that can also send out a narrow band signal to spoof the ECU for the rear O2. Someone has done it here. Good idea if you have to get emissions and still want to go catless.
I might have to look into that!

2014 Tsukuba Red 2.0T AT

SFR Stage 1.5 Tune
Injen SRI
Synapse Radial BOV
ISR Race CBE / TP / DP
Khartunerz CF Lower Grill
Boostec CF Lip
Carbon Creations CF Trunk
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post #13 of 14 Old 08-01-2019
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Originally Posted by mrGainZ View Post
Are there any tunes out there that completely bypass the CEL? I have the SFR tune that turns off the cat efficiency (bypass P0420 code) but readiness will not set when doing the emissions testing which results in a hard FAIL. This is the only reason I have to leave this darn restricted o2 housing in......



I might have to look into that!
No tune that I know.

https://www.gencoupe.com/2-0t-discus...-emulator.html

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post #14 of 14 Old 08-01-2019
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[QUOTE=mrGainZ;4742838]Are there any tunes out there that completely bypass the CEL? I have the SFR tune that turns off the cat efficiency (bypass P0420 code) but readiness will not set when doing the emissions testing which results in a hard FAIL.


Aren't you allowed to pass the emissions test with 1 monitor not ready as long as the others check out ok? I'm able to do that on my 2JZ with a emulator for the second O2/ secondary cat sensor only which always reads good when warmed up. No issue as far as I know
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