Tune Review and Help Needed! --- 2018 Camaro ZL1

[TuningNoob]

I have a 2018 Camaro ZL1, 10 speed, that I just recently cammed. I got it tuned by a popular tuner, I'll leave the name out for now depending on feedback. I just wanted to see if someone could look over my tune and let me know if there are any problem areas in it. I also have a couple of issues that I would like some direction on.

Mods:
Rotofab Big Gulp
LT5 Throttlebody
Cam Motion Cam: 224/240, 118 LSA, 0.600/0.600
0 Degree Lockout Block
DOD delete plugs
ARP Head studs
LME Chain Guide
Katech C5R
BTR Conicals
Manton Pushrods
Ferrea Exhaust Valves
CHE Valve Guides
Johnson 2110Rs
GM Lashcap, shaved down
Katech Oil Pump
Elite catch can
AEM 30-0334
Ported supercharger snout

The engine side of the tune seems pretty good. No misfires, pulls hard, AFR looks good, etc. The transmission side is the bulk of my complaints. I am getting a jerk at slow speeds, it gets significantly better (maybe 60% improvement) when the car is up to temperature but it is still there. I have had other cammed cars that have way stouter of a cam but yet drive smoother. I have brought it up to the tuner multiple times and he blames it on having the stock torque converter, refusing to mess with it further.

The other issue I am having is the shifts are really firm/jerky. I asked him to soften them up a little more -- I think he did for the lower throttle shifting but he refused to change the higher throttle shifts. 50% throttle almost feels like you are getting rear ended during shifts. There is a big jerk when slowing down to make a turn, when it shifts into a lower gear.

Please let me know of any issues you see in the tune or any advice on fixing my complaints. Thank you!

[Alvin]

VVE tuning will likely improve things all around. It's honestly pretty wild to me that someone would spend so much time on the torque model without getting the airflow models correct first.

[obd2]

yes you are in maf only mode so most likely ve was never dial in. gen5 need both modes to be dial in specially auto cars. the torque model look ok

[GHuggins]

Yeah, even though you're not logging enough to show how bad it's out everywhere, your average error in your VE table is 40% in the log you posted.

[TriPinTaZ]

Was the TCM tuned as well?

[edcmat-l1]

1, It looks like it has a pretty significant, consistent miss on bank 1.

2, The VVE looks off by quite a bit.

3, The idle seems a touch high for a stock converter.

4, Because it's a stock converter (tight) there needs to be some changes made to when and how it locks up. Don't just blame the converter, change the way it does its job.

4, Pressure seems a bit high to me.

5, I'd put all the trans TM back to stock. That should help the shift feel. That along with the proper TCC changes should make quite a bit of difference in the way the trans feels overall.

[TuningNoob]

VVE tuning will likely improve things all around. It's honestly pretty wild to me that someone would spend so much time on the torque model without getting the airflow models correct first.

yes you are in maf only mode so most likely ve was never dial in. gen5 need both modes to be dial in specially auto cars. the torque model look ok

Is VVE tuning the same as speed density tuning? I didn't choose that option when getting the tuning. If that's basically a requirement, why would anyone even leave that up to choice?

Yeah, even though you're not logging enough to show how bad it's out everywhere, your average error in your VE table is 40% in the log you posted.

If it would be more helpful I can add some more parameters and relog. What else would help?

Was the TCM tuned as well?

Yes the TCM was tuned too.

1, It looks like it has a pretty significant, consistent miss on bank 1.

2, The VVE looks off by quite a bit.

3, The idle seems a touch high for a stock converter.

4, Because it's a stock converter (tight) there needs to be some changes made to when and how it locks up. Don't just blame the converter, change the way it does its job.

4, Pressure seems a bit high to me.

5, I'd put all the trans TM back to stock. That should help the shift feel. That along with the proper TCC changes should make quite a bit of difference in the way the trans feels overall.

I'll check on the plugs on bank 1. He had way too much fueling (rail pressure issue) on the first few revisions. I took the plugs out and cleaned them up but maybe I missed something. What parameters are you seeing a miss in? The STFT seem pretty consistent between both banks. I threw the O2 voltage into CSV and it looks like bank 1 trends from 420mV to 380mV. Bank 2 trends around 450mV down to 420mV. I thought below 450mV indicated lean?

What transmission pressures would be more in line for my build?

Trans -> Torque Management -> Torque Limits are what you're referring to about putting it back to stock?

I'm at a loss with this. It seems pretty obvious I'm not going to get a finished product with the current tuner, I'm going to try to work through some of it on my own. I'll probably end up needing to get a retune from someone else though.

Thank you everyone for the help so far!

[edcmat-l1]

When you're looking for a miss you're looking for a certain shape in the line graph. You're not looking for high/low specs or averages, you're looking for shape comparing one side to the other.

bank 1 miss.jpg

bank 1 miss 2.jpg

bank 1 miss 3.jpg

Adding a lopey cam can cause the same shape but when one side is significantly smoother than the other, you have to suspect a cylinder miss on the rougher side.

You're looking for harsh downward spikes in the narrrowband sensors. They are indicators of raw O2 being picked up. In your case, both banks have these downward "V" shaped spikes but one bank is predominantly worse than the other.