Lozic ECU + TCU + AWD Tune

[Team Tonka]

I got the Lozic trio installed and went out for a drive a couple of times about 90 mins each.

I was somewhat familiar with the TCU but now going from level 3 to 2. Shifts are still fast but now don't have that bite that 3 does which I am perfectly ok with.

The AWD module does seems to transfer more power to the front faster but it difficult for a newb like me to know for sure.

First impressions of the ECU are...well maybe I shot too high (1.5bar on 93). It's still early maybe requires more time to adapt but currently JB4 shows on average 4.5 and up to 6.8 timings. JB4 also says that boost is going as high as 26...

What I think is the boost standby feature is somewhat undesirable. Under any throttle more than 10% it sounds like the turbos are spooling and every shift I can hear the stock BOV. Sometimes it does not sound great like when the wastegates are stuck open. Not liking that at the moment but maybe it's something I can get used to.

The thing I can't get used to is the surging or fluctuations under light acceleration. The car becomes what I can describe as an uncomfortable, possibly malfunctioning theme park ride. I can barely keep from larger deviations of pedal input. I used a lower sensitivity on the windbooster and still had a similar effect. I watch the needle/number of the throttle on the JB4 app spaz like a meter on a pressurized line going out of control. Not sure what to make of this.

Sorry for the long post I'll keep at it. Any input is appreciated, thanks!

Give the ECU some time, after a bit of learning the deviations will likely drop a bit. Feel free to send your CSV file to Lozic to review as well and ask them about the timing deviations and if there should be concerns. I'm at 1.5bar and run 93 as well, I'm going to have the remap done so boost standby is off - I don't like it. Trying to decide if I go to a 1.4bar map. TCU is ordered as well, I'm AWD and mostly auto-shift, so doing a pressure of 2 and -7%. Like others have said, turn the windbooster off.

 

[SnowyGT2]

Hey guys, sorry if this question has been asked, this thread is huge and I'm looking for some info and advice.

Is there a good place to read up on the TCU + AWD and JB4 stuff? It all sounds great, but I don't understand all of the parameters being adjusted.. like TCU -5, pressure 3, torque limit off. Seems like some people like the JB4 with the TCU and AWD. I've been trying to find what each MAP does of the JB4, or what MAP I should use, if I get it, for the mods I'm planning?

I don't want to make crazy extra power. I just want a bit better of a driving experience and a little extra power, maybe 50 extra whp and wtq. (Would I need step colder plugs for that or just better plugs?) I don't want blow the motor on the stinger, or anything.

I'm basically just planning on a catback exhaust/downpipes (keep primary cats) and air intakes... maybe a bigger FMIC. Sounds like if I start any tuning I should get better plugs and a step colder if making 75HP to 100HP more. Also, I'll only be running 91, no 93 available in my area.

Plugs are very much recommended and if you want a bit of extra power JB4 + TCU seems like a solid choice especially if only using 91. I've had Level 3 and now Level 2 TCU and it's perfect for me in terms of performance and comfort.

 

[turboAWD]

Gents- I just installed my tcu 2 days ago and might actually be getting a different car now. I will know by Saturday if the deal will go through. If so I will have my brand new TCU for sale if anyone is interested. Let me know again I will know Saturday but if your interested shoot me a pm and I will let you know for sure Saturday.

Don't leave us hanging - what are you looking at?

 

[SnowyGT2]

Give the ECU some time, after a bit of learning the deviations will likely drop a bit. Feel free to send your CSV file to Lozic to review as well and ask them about the timing deviations and if there should be concerns. I'm at 1.5bar and run 93 as well, I'm going to have the remap done so boost standby is off - I don't like it. Trying to decide if I go to a 1.4bar map. TCU is ordered as well, I'm AWD and mostly auto-shift, so doing a pressure of 2 and -7%. Like others have said, turn the windbooster off.

Thanks, I'll do some more driving with the Windbooster unplugged. I'll probably end up seeing if I can have boost standby off and go down to 1.4.

 

[Jaybone]

Don't leave us hanging - what are you looking at?

Don't leave us hanging - what are you looking at?

Audi

 

[grilledcheesesamich]

Plugs are very much recommended and if you want a bit of extra power JB4 + TCU seems like a solid choice especially if only using 91. I've had Level 3 and now Level 2 TCU and it's perfect for me in terms of performance and comfort.

Thanks for the info. Is there further documentation or information or a breakdown on what Level 3, Level 2 does and is for the TCU? I'm looking for some breakdowns on the JB4 Maps and TCU options.

 

[turboAWD]

Audi

Rs3? S5 sb?

 

[Jaybone]

RS3

 

[turboAWD]

RS3

Yeah, I could see that. Especially if you don't need the extra space - I need the space to fit all 4 family members, luggage for a day trip, etc. RS3 would be way tighter..

 

[SnowyGT2]

Thanks for the info. Is there further documentation or information or a breakdown on what Level 3, Level 2 does and is for the TCU? I'm looking for some breakdowns on the JB4 Maps and TCU options.

Plenty of info on here about JB4. Being able to choose a Map and have the safety retained is what makes it awesome.

From my understanding the TCU has a few options like shift point reduction like 5%. The pressure level 1-4 determines how fast the shifts happen with level 2 being fast, level 3 even faster but with more of a jolt. Launch control torque limit is the icing if you want better launches without doing break snip, just takes practice as I still sometimes spin all 4 wheels if wait too long.

Not sure of specifics but take a look at the order sheet or ask Lozic directly if you need more clarification. Lots of good information here and people willing to share their experiences.

 

[grilledcheesesamich]

Plenty of info on here about JB4. Being able to choose a Map and have the safety retained is what makes it awesome.

From my understanding the TCU has a few options like shift point reduction like 5%. The pressure level 1-4 determines how fast the shifts happen with level 2 being fast, level 3 even faster but with more of a jolt. Launch control torque limit is the icing if you want better launches without doing break snip, just takes practice as I still sometimes spin all 4 wheels if wait too long.

Not sure of specifics but take a look at the order sheet or ask Lozic directly if you need more clarification. Lots of good information here and people willing to share their experiences.

Thanks, Snowy. I'll keep digging.

 

[Stock_stinger]

Only GTS and Indigo have it. It changes the behavior of the center diff allowing close to 100% rear bias. This is controlled by the AWD module though. so if you go the Lozic AWD module I assume you'd lose the function. I don't think the TCU does anything with it, although a good question is does this TCU allow you to hold gears like the GTS/Indigo? You can go all the way to redline in sport + without the trans upshifting in these models.

You can do it in allpdels with tv/stability off in manual mode

 

[turboAWD]

Arrived today! Hope to install it today or tomorrow. Saturday at the latest.

 

[djerickd]

Arrived today! Hope to install it today or tomorrow. Saturday at the latest.

Do it now!! Takes 5min, 10 tops.

 

[Avant]

4 10mm nuts to take off and one plug. legit 5 mins. My 10 year old daughter did mine for me.

 

[Corleone1]

Change TCU today - report of driving and a bit of thinking...

Good service of Lozic that did change my first TCU with -5% and pressure 2 for -8% and pressure 3. I didnt even ship back my first TCU before I got the second one. Very good of Lozic to be trusted as a client!

I did run some today and I can say that pressure 3 runs as 2 in daily driving, no difference. At WOT it is a slight difference, a bit harder but also that I want. Way softer from my GTR that bangs in gear. Pressure that you choose is also a max pressure that can be used of TCU/ECU and calculates of Rpm, load/torque, trottle, gear, temp and probably even more. So we can describe it as we get that pressure on demand that we need for the moment.

I still recommend pressure 2 (and -8%) for most Stingers that have tune, exhaust and normal fuel. Tune here I think is best with 1,3-1,4 bar (19-20 psi).
We as have full bolts with Meth and a bit better fuel (E-mix) go for pressure 3 and -8%. Here is a Tune with 1,5 bar ok. Over 1,5 bar (22 psi) seems not to make more power in WOT powerband just more low-middle rpm torque and will not make the car faster.

Shifting is like around 5800-5900 rpm and dont feel so strained with these earlier shifts. A good thing also is that fuel will be more enough with less HPFP problems, boost dont drop so much as rpm is lower, shifts get also faster with higher boost in shifting as the rpm is lower. Works great with JB4 if you do the right settings and of course with Lozic ECU or other.

Launch has to be trained to be safe. And repeat exact launch every time is difficult. So now we all waiting for that JB4 with Terry and team and also Lozic can develop a rpm launch limit and also boost limit in first gear like below 3000 rpm and 10 psi. When you then launch rpm and boost dont go crazy and when brake is released, speed is like 10 mph 1 gear full tune can be released with boost as it is set. Hope it can be solved... I am just wishes and speculate...

 

[djerickd]

Thank you for the -8% recommendation, I love how the car shifts now!!

 

[djerickd]

Is pressure level 3 like this??

 

[djerickd]

I love how the car shifts in sport mode it reminds me of GM's performance shifting algorithm I had in the G8 and in my CTS V-Sport. In those cars you had to be in sport mode then floor it for 3 seconds, then it was like a "racecar" downshifting into corners.

In Sport the Lozic TCU tune seems to always be in the right gear to have fun.

In comfort, this thing isn't so sluggish anymore.

ECO is still ECO lol.

 

[turboAWD]

Just installed the TCU. 3 of the 4 10mm nuts were, turn 1/4 turn with a wrench, then do the rest by hand. 4th one needed the wrench pretty much the entire way. Kia quality control, I guess Yes, install was dead simple.

Seems to drive fine, didn't get much of a chance to really push it - morning traffic, plus didn't want to be an a-hole.

I did notice that when in manual mode with TCS off, it will now not upshift in 1st (in sport) - at least, it seemed that way. Originally, IIRC, it required TCS AND ECS to be off to bang off the rev limiter. I'm hoping it still upshifts when in manual mode with nothing else disabled.

Haven't tried launch control yet.

OT: found the reason for the "burning oil smell" I have been having a few times lately. I was afraid I had done something weird / wrong when using the ETK vacuum pump to drain / refill the oil, since I hadn't noticed it before that. Turns out, my BMS catch can is leaking oil onto the downpipe. I'm guessing it's not so much the can itself, as maybe not tightening it down enough, or leaving it too horizontal - I didn't trim any of the hoses. It's been fine for almost 2 years (maybe 5000 miles) so 1) it's definitely working and 2) maybe I just need to drain it periodically, or tighten it down more. It's a relief it's not turbo seals or something bad. Waiting for it to cool down, will then clean / drain.