2.5L tuning options and performance

[danylo.podilchyk]

are there any new mods for our platform?

 

[danylo.podilchyk]

are there any new mods for our platform?

 

[KillerBee_The_$tingerr]

I’m hoping more Gt-line owners comment! ‍

 

[Volfy]

I'm guessing by "mods", you mean HP/TQ related.

Most of the stuff I've done with ours are all suspension related. Those are shared with all Stinger/G70 and 100% cross compatible.

 

[KillerBee_The_$tingerr]

I'm guessing by "mods", you mean HP/TQ related.

Most of the stuff I've done with ours are all suspension related. Those are shared with all Stinger/G70 and 100% cross compatible.

Yes that is true but with the gt line especially engine being much different then what’s out it hasn’t been much solid proven mods for the 2.5l that wouldn’t cause an engine light or even won’t void warranty issues.

 

[K8 Stinger Store]

Yes that is true but with the gt line especially engine being much different then what’s out it hasn’t been much solid proven mods for the 2.5l that wouldn’t cause an engine light or even won’t void warranty issues.

Intake, exhaust, and blow-off valve are all solid upgrades and won’t trigger a check engine light. We have all of these available for the 2.5T.

 

[KillerBee_The_$tingerr]

Any new ideas on mods that can be done to a Stinger Gt-Line that can add more HP/TQ without going as far as getting a tune

 

[NYBIOMED]

Any new ideas on mods that can be done to a Stinger Gt-Line that can add more HP/TQ without going as far as getting a tune

Piggyback is the best mod for hp gains as far as I know....I don't see blow-off valves, exhaust or intake as adding much of anything. The piggyback is $500 and can give you as much as 40hp or so- measured by my seat dyno...they claim more of course. I have access to E-85, so I can take advantage of MAP3.

 

[KillerBee_The_$tingerr]

Piggyback is the best mod for hp gains as far as I know....I don't see blow-off valves, exhaust or intake as adding much of anything. The piggyback is $500 and can give you as much as 40hp or so- measured by my seat dyno...they claim more of course. I have access to E-85, so I can take advantage of MAP3.

Been trying my best nott to lean onto a piggyback or even jb4, Is an ECU piggyback really easier and not a headache to take on and off ?

 

[NYBIOMED]

Been trying my best nott to lean onto a piggyback or even jb4, Is an ECU piggyback really easier and not a headache to take on and off ?

OMG, yes. The JB4 docks to your OBD2 port and connects via Bluetooth. You control everything through the app. I don't really know if Lozic, and ilk, are better...they probably are, but they're much more expensive and can you easily "sell" them when your done or want to move into another 2.5T? If your still under warranty, will the OEM "see" and deny claims? Can you turn it off? I got a tank of bad gas, threw a code, lost the turbo...I simply turned it off through the app to protect the engine. After a couple tanks of gas, everything cleared and I went back to MAP2- daily driver mode for me. E85 is 20 minutes away from me, so not always run in MAP3.
Easily worth the $400 i paid for used from another member of this site. An exhaust is $2k and might get you 5-10hp...i might get the Injen intake and get the same 5-10hp bump for under $500 as my last mod, I wish they made a TCU tune, the 3.3TT had them for super cheap- certainly worth it from my readings here. I hit 64k miles a couple weeks ago in my 2022, been fun so far...I picked up a 2025 AWD/hybrid Ford Maverick Lariat last week, so the Stinger can get some rest moving forward. Man, the eruption green is surely much more beautiful than the Stinger's Ascot green!

 

[K8 Stinger Store]

Any new ideas on mods that can be done to a Stinger Gt-Line that can add more HP/TQ without going as far as getting a tune

If you don’t mind me asking, what’s the reason that you would be opposed to installing the JB4 Tune?

 

[KillerBee_The_$tingerr]

Do not want to void warranty with Dealership.

 

[Volfy]

Do not want to void warranty with Dealership.

Then stay stock and learn to enjoy the car as is. Even with a 2.5T, this platform is more capable than a lot of folks give it credit for. I've got a JB4 on mine, but for everyday driving, I stay with Map0. Carving corners doesn't need HP, and the Stinger does it well enough to be very satisfying. A stock Stinger handles far more capably than most that own one.

 

[pahoynaas]

Is there anyone who owns 2.5L Stinger here?

I just bought my ‘22 GT line a month ago, just haven’t been able to afford mods yet. But good god I LOVE this car!!!! Like many people I wanted the 3.3 twin turbo, but my issue was not being able to even locate one close to Oregon. At first, I thought I would be disappointed with the 2.5 L, but I have been pleasantly surprised with how much I love this thing. It’s fast AF.

 

[AWDGT2]

JB4 doesn't void your warranty because it doesn't hurt the drivetrain if used properly. JB also makes it very difficult to do something dumb. Stick with the built in maps and you'll be happy you did. I run E-30 with the fuel it flex sensor, the JB on Map4 and Methanol injection. Last Dyno run we went from 263 stock HP to 368 hp and 400 ft of Tq. That's more than a stock 3.3 so yes mods are worth it
If that's not the route you want to go down, then a nice Cold Air Intake with a big mouth scoop is worth the investment.

 

[Thomby]

Been trying my best nott to lean onto a piggyback or even jb4, Is an ECU piggyback really easier and not a headache to take on and off ?

Does BMS not consider the JB4 a piggyback? Because I'd say it is, just a very well executed one. Instead of replacing or overwriting the stock ECU, it intercepts factory sensors and modifies the signals the ECU sees, so you retain stock programming & protections.

At its most basic, you plug it into the MAP & TMAP sensors, and the ODBII port. No tools, 5 minute job to plug in...longest part of the job is neatly tucking away the wiring. Then instead of the ECU seeing you're at 12 psi, the JB4 tells it you're at (say) 8 psi, so the ECU lets the turbos spin up another 4 psi of boost.

You can also add fuel wires (10 min job) to intercept the O2 sensors and manipulate AFR in a similar way.

 

[Volfy]

You can also add fuel wires (10 min job) to intercept the O2 sensors and manipulate AFR in a similar way.

I don't think JB4's fuel wire "intercepts" the O2 sensor signal, in the same way it does with MAP & TMAP sensors. It only taps into the O2 sensor feedback wire to read the Lambda voltage signal.

FWIW, JB4 for 2.5T doesn't have a hard-wire provision for Lambda signal. It reads that on the CANbus instead.

 

[Thomby]

I don't think JB4's fuel wire "intercepts" the O2 sensor signal, in the same way it does with MAP & TMAP sensors. It only taps into the O2 sensor feedback wire to read the Lambda voltage signal.

Ah you're right, the way it physically connects puts it in parallel with the sensors rather than in series, ie read-only. So that begs the question of how it leans out AFR in the higher revs...if it's by further manipulating the MAP/TMAP signals, I'd expect the ECU to "catch" it on the exhaust side.

Unless our cars run in open loop at high rpm, which would surprise me given how modern/"smart" they are (I would've assumed closed loop basically 100% of the time, with exceptions maybe at startup or if something goes wrong).

 

[K8 Stinger Store]

Do not want to void warranty with Dealership.

This is exactly why I asked the question.

Many new members to the community aren’t very familiar with a piggyback and how it works.

The JB4 Performance Tune will NOT void your warranty with your dealership or with Kia, as that is not how the warranty works.

Please take a moment to read the following information on our website, which will give you a better idea.

Will Aftermarket Parts Installed Affect My Factory Warranty? - K8 Stinger Store

Nobody wants to lose their warranty, rest assured ordering this product and installing it will not void your warranty.

Please feel free to reach out anytime if you have questions, we’re more than happy to walk you through the process and answer any questions you have.

 

[Volfy]

Ah you're right, the way it physically connects puts it in parallel with the sensors rather than in series, ie read-only. So that begs the question of how it leans out AFR in the higher revs...if it's by further manipulating the MAP/TMAP signals, I'd expect the ECU to "catch" it on the exhaust side.

Unless our cars run in open loop at high rpm, which would surprise me given how modern/"smart" they are (I would've assumed closed loop basically 100% of the time, with exceptions maybe at startup or if something goes wrong).

That's a good question. I have my doubts whether JB4 by itself can alter or "remap" fueling at all. I don't see how it could. I'm under the impression that is what the back end flash is for - adding spark ignition timing and AFR control - though I'm far from an expert in that or have 1st-hand knowledge. As much as I like the JB4 system and the sheer bang-for-your-buck, it has its limitations, compared to a reflashed ECU. Doesn't bother me, since the highest I'd run is Map2. I'm not into max HP/TQ gain anyway. I run it at the track more to keep the turbo spooled up to reduced turbo lag when driving out on corner exit.

For the other 99% of my driving, on public roads, I much much prefer being able to drop back down to Map 0 easily. A reflashed ECU wouldn't let me do that... at least not without swapping a stock ECU back in.