Who is Running Catless? What Temps Are You Seeing? What Tuner Box Are You Using?

[Kamauxx]

Nobody said it was the jb4. We dont know at this point.

He knows that. He's trolling because he has a Lap3 and hates JB4 for some reason.

 

[DaBears4Lyfe]

No overboost ever on Lap3 but hey, we got ripped off right ?

LMAO another one that doesnt read. Im overboosting in stock map you dingleberry. Please read MDL (can i use that abbreviation? Sounds cool like MJD)

Nobody said it was the jb4. We dont know at this point.

This has nothing to do with the JB4 Im over boosting in stock map due to temps and being catless. MDL is just here to rep lap3 and try to prove its the only quality product available (he was suckered into the 1200 price tag means its better than a 500 priced product).

 

[DaBears4Lyfe]

So weird...I was catless, 0 codes even when I was 6000ft up in the snow.

Have you tried disconnecting JB4 and see if it still happens?

Never had overboost issues, then again...I'm not on a JB4 .

since you provided quality info (thank you very much) What temps were those at? Like i said im seeing single digits with negative teen wind chills. Id be interested in knowing. Thanks!

Remember the colder it gets the higher density of air that is being used creating much more boost.

 

[Michael Locke]

Nobody said it was the jb4. We dont know at this point.

So it's normal to see 22psi in cold weather on a stock map? Nah, just like the Optima/Sonata platform, when you change the midpipe and go catless, you overboost. Now if you have say a ProTuner that has the ability to help with those pesky O2 sensors and/or ECU tune that repurposed them as just a wideband etc... Then it wouldn't be an issue. But please don't listen to the folks who have been tuning KDM since 2011. Us guys are just idiot fanbois with 0 knowledge. ‍

Sometimes, there's valuable information out there, but you have drop the arrogance every once in a while, or you'll miss it

That goes for me as well.

 

[DaBears4Lyfe]

So it's normal to see 22psi in cold weather on a stock map? Nah, just like the Optima/Sonata platform, when you change the midpipe and go catless, you overboost. Now if you have say a ProTuner that has the ability to help with those pesky O2 sensors and/or ECU tune that repurposed them as just a wideband etc... Then it wouldn't be an issue. But please don't listen to the folks who have been tuning KDM since 2011. Us guys are just idiot fanbois with 0 knowledge. ‍

Sometimes, there's valuable information out there, but you have drop the arrogance every once in a while, or you'll miss it

That goes for me as well.

22 PSI is not normal thats why the car was designed with cats The Protuner may have solved for this since they knew a ton would go catless (like most other KDM tuned cars), but Id love to know the temps others are seeing even with the Protuner. I have been guaranteeed if it doesnt solve my problem they would take it back no questions asked.... but how would i log everything no logging with the lap3

 

[Michael Locke]

22 PSI is not normal thats why the car was designed with cats The Protuner may have solved for this since they knew a ton would go catless (like most other KDM tuned cars), but Id love to know the temps others are seeing even with the Protuner. I have been guaranteeed if it doesnt solve my problem they would take it back no questions asked.... but how would i log everything no logging with the lap3

I've got no need to log. Honestly, most issues are pretty black and white so far with this car. Lap3 R&D is pretty reassuring and has been in the past so I haven't really seen the need, at least with minor bolt ons. I can however look at and monitor IATs and haven't ever seen anything abnormal via the ProTuner app even after hauling ass up in the mountains.

I'd check with Peter Bartolli? He's jb4, catless and in Canada.

 

[DaBears4Lyfe]

I've got no need to log. Honestly, most issues are pretty black and white so far with this car. Lap3 R&D is pretty reassuring and has been in the past so I haven't really seen the need, at least with minor bolt ons. I can however look at and monitor IATs and haven't ever seen anything abnormal via the ProTuner app even after hauling ass up in the mountains.

I'd check with Peter Bartolli? He's jb4, catless and in Canada.

Ya he seen an issues before (where the ECU spikes) and it sorted itself out. Its been a while since he logged a run in low temps hes going to try and get one this week..

 

[Michael Locke]

Ya he seen an issues before (where the ECU spikes) and it sorted itself out. Its been a while since he logged a run in low temps hes going to try and get one this week..

Jesse at Turbokits.com saw overboost codes almost immediately after they went fully catless on a stock tune.

 

[DaBears4Lyfe]

Jesse at Turbokits.com saw overboost codes almost immediately after they went fully catless on a stock tune.

What overboost codes? I dont throw a CEL when i over boost. It just slams shut the throttle and boost is lost once the ECU PSI reads 20.

 

[Michael Locke]

Ah, I see now. Well that would be a misfire/knock event triggering that.

That's a horse of a different color. Usually has to do with octane content. Have definitely experienced that myself and while catless. It happened when I didn't mix enough E85 with the winter 91 here in N.CA which is already shitty enough. It was mid November about 40ish degrees. Did 4 instead of 5gl and literally turned around, added a gallon and was good to go .

 

[DaBears4Lyfe]

Ah, I see now. Well that would be a misfire/knock event triggering that.

That's a horse of a different color. Usually has to do with octane content. Have definitely experienced that myself and while catless. It happened when I didn't mix enough E85 with the winter 91 here in N.CA which is already shitty enough. It was mid November about 40ish degrees. Did 4 instead of 5gl and literally turned around, added a gallon and was good to go .

No knock or misfires in any logs. I've also had a few people look at it. Its over boosting for sure. Once it happens I wont gain normal boosts until I restart.

The ecu psi spikes and spikes hard to 20 then cuts. I'm talking from a dig by 5k rpm I've hit 20 psi.

 

[DaBears4Lyfe]

I did just add some octane booster and will check it out tomorrow.

 

[Get Stung]

But if it happens on map 0? Octane boost doesnt make a whole lot of sense. I did think about that as proper octane has in the past been an issue for me. It's a delicate balance I've yet to perfect. Did you clear the code on the jb4?

 

[DaBears4Lyfe]

But if it happens on map 0? Octane boost doesnt make a whole lot of sense. I did think about that as proper octane has in the past been an issue for me. It's a delicate balance I've yet to perfect. Did you clear the code on the jb4?

Yes I have to clear them every time I go to start the car.

 

[MerlintheMad]

I think you legit just post to get that count up instead of providing any information

That's the natural hazard of occupying Space on a forum. You get marked as some kind of "social climber". If you were retired, enjoyed the car enough to read endless verbiage of interest about it, and wrote as fast as I do, Your Post Count would be as impressive. It got that way because (as I've said before) I come here as a diversion from certain real life concerns. This place is an effective diversion: even when I am distracted by a few people who object.

I've told all you all before that I am not really a "car guy". And it's true, but only as a past thing, not so much since getting a Stinger (my first new car and first performance car).

I had to look up "catless" before I asked my question. And that prompted me to ask WHY? It's illegal to remove the catalytic converter; you risk messing up the computer sensors and screwing up your engine because the mixture is wrong; and all for more noise and a few HP. So, WHY? Modern cars are designed to run with them. To go catless is to court trouble if not catastrophe to the engine. But you know better? Is that it?

Oh, and I see how you took that: It is ME who needs to get "edumacated" not you: I wasn't attacking your experience: I was and am soliciting information/education. Sorry for the confusion and offense; none was intended.

 

[MerlintheMad]

Seriously? Are you just trying to troll, or have you never modified a car in your life?

Never modified a danged thing in my entire life. Right the second time.

So to help you understand, yes people change the Stingers restrictive stock exhaust for more HP. More Power=More fun! And if you dont agree with that statement then you may have the wrong car!

I do agree with "more fun". I just don't understand why someone would think they have this figured out when the car was designed (as all modern cars are) to run with a catalytic converter: and the computer is dependent on it: and it is illegal to ditch it: and the results of running catless can ruin an engine. If DABears is having issues and is going to reattach his cat, to see what's going on, is he not admitting that he's at risk? Ignorance is what I am talking about: why risk it if you are not absolutely sure about what losing the cat is going to do?

 

[DaBears4Lyfe]

Never modified a danged thing in my entire life. Right the first time.

I do agree with "more fun". I just don't understand why someone would think they have this figured out when the car was designed (as all modern cars are) to run with a catalytic converter: and the computer is dependent on it: and it is illegal to ditch it: and the results of running catless can ruin an engine. If DABears is having issues and is going to reattach his cat, to see what's going on, is he not admitting that he's at risk? Ignorance is what I am talking about: why risk it if you are not absolutely sure about what losing the cat is going to do?

Merlin removing cats have been done for ages and has been done on our cars on countless builds. Cats are an emissions thing, but proper tuning can really unleash the full potential of your car. Removing cats with the combo of cold weather has resulted into issues. This is what im going to confirm by putting a set of cats on my car. I will say it again though, you can run a Kia Stinger GT without cats without issues.

Based in your logic the speed limiter of 137 is necessary for those cars so they dont have issues but yet it's ok for some to have a 160 speed limiter.... Catch my drift...

 

[Michael Locke]

I did just add some octane booster and will check it out tomorrow.

I know you think I'm lying to you and an trying to be a dick but the jb4 isn't accurate when reading boost. 20psi won't cause the car to overboost. It takes allot more than that while you have a piggyback.

 

[Matt77]

No knock or misfires in any logs. I've also had a few people look at it. Its over boosting for sure. Once it happens I wont gain normal boosts until I restart.

The ecu psi spikes and spikes hard to 20 then cuts. I'm talking from a dig by 5k rpm I've hit 20 psi.

Just a thought. Even though you are on Map 0 does the JB4 safety boost cut still stay active? That is set to 20 psi by default. I'd try disconnecting the JB4 completely just for a test.

 

[MerlintheMad]

Merlin removing cats have been done for ages and has been done on our cars on countless builds. Cats are an emissions thing, but proper tuning can really unleash the full potential of your car. Removing cats with the combo of cold weather has resulted into issues. This is what im going to confirm by putting a set of cats on my car. I will say it again though, you can run a Kia Stinger GT without cats without issues.

Maybe not, if as in your case temperature extremes play a part. One of the things I read today was that catalytic converters "work" to limit pollutants out the tailpipe only in a temperature range like coastal CA (I think I got that right): that colder temps reduce the cat's effectiveness to almost nil; but the law is the law. If you take the cats off and run really cold you are messing with the rest of an integrated system and courting trouble if not destruction of the engine.

Based in your logic the speed limiter of 137 is necessary for those cars so they dont have issues but yet it's ok for some to have a 160 speed limiter.... Catch my drift...

No, I don't. A speed limiter and cat are hardly analogous. One is just an artificial cut out, the other integrates with the fuel and air mixture via computer. If you lobotomize the speed limiter, it only releases the engine to go as fast as it is designed. To remove a cat potentially risks computer readings, which can make the engine run hot and fry rings and such. (I'm possibly missing something in your analogy, but I think it's a false analogy.)