Tune review - 6.0 823 BTR III in Manual F-body

[Cazbah362]

Anyone: Could someone look at this tune and provide first start suggestions. I used multiple reference tunes, but realize I probably am missing something and do not wish to hurt anything. Here is the tune: 2002 Camaro 5.7 Manual GM#12576341 V1.hpt

Here is what my build log is:

Car/Engine: F-Body with Manual, Iron block 6.0 (.020 over) factory pistons. 823 heads, LS3 injectors and intake, 92mm DBC,BTR LS3 Stage III (Cam specs are 229/244 .615"/.595" 113+4) T-56 transmission and 4:10 gears

Engine Type: 6.0
Fuel Settings for GM#12576341
VATs - Off

FANS - 160 Thermostat
- Fan #1 on at 170, off at 160
- Fan #2 on at 195, off at 190

DTC's > Uncheck SES and set Error Mode to "no error report"

- 02 Bank 1, Sensor 2 Delete
P0137
P0138
P0140
P0141

- 02 Bank 2, Sensor 2 Delete
P0157
P0158
P0160
P0161

- Air Injection
P0410
P0412
P0418

- Catalyst
P0420
P0430

- Evap Systems
P0440
P0442
P0443
P0446
P0449
P0452
P0453

- For Manual Transmission
P0803 - Skip Shift

[Lakegoat]

Since you turned off the rear o2's, go to Engine--Fuel--Temperature--and COT--Disabled. Under Fuel--Power Enrich--Delay to 0, EQ Ratio to 1.18, Enrichment Ramp in 2.00.

[Cazbah362]

Thank you!
Changes Made as suggested:

02's Off, go to Engine--Fuel--Temperature
- COT--Disabled.
Under Fuel--Power Enrich
- Delay to 0
- EQ Ratio to 1.18 (Smoothed over selection)
- Enrichment Ramp in 2.00.

Here is the updated tune: 2002 Camaro 5.7 Manual GM#12576341 V1.hpt

Any other suggestions, recommendations, etc - Please feel free. Being new at this, I need as much as I can get (totally missed the the COT Disable)

[Lakegoat]

You have to drive and log it to get it fine tuned. There is no way to tune your car without dyno or driving.

[Cazbah362]

Yep, understand - wanted to make sure base is as complete as possible. Currently working on getting my Pro link setup on my wideband finishing the install. I will post the first log once I do.

[Cazbah362]

Installed the engine and fired it up based on the tune in post #3, used the Zietronix WB and here is some data while it is warm, all together and idling. My first observation is it is lean? However, I would suspect there is something I am missing, and seasoned tuner could catch what I am missing.
Note, I live in the mountains, about 5500 DA

[Cazbah362]

OK,
Did a quick run around the block, here is the log:

[5FDP]

A 6.0 has a cylinder volume of .74590 I believe and your current tune still shows the stock 5.7 cylinder volume. Update that to the new .020 engine size or as close to that as you can get.

If fuel pressure is within spec and you have no intake or exhaust leak pre o2 sensor as well as a complete exhaust you can just add 5% to the entire MAF/VE table to fueling closer for the time being.

Past that the MAF and VE will need a complete do over to get fueling under control. Both will need to be separate from one each other and both will be done in open loop with no fuel trims.

[Cazbah362]

5FDP - Thanks, no leaks, fuel is within margin, and I have an exhaust system. Based on those parameters, I added 5% to both MAF/VE tables. I also updated the volume to a 6.2 engine, my this seemed to be the closest.

Once I do a test run, I will send the log file

Attached is the updated tune:

[ryan_axberg]

I would change you open loop eq to something like what stock looks like. And you don't need as much fuel as your commanding in your power enrichment table. It would also help you if you zeroed out your coolant temp spark modifier table.

[Cazbah362]

Ryan,
First, I am a newbie so apologies if I say/do something silly and thank you for your insights. With that said, I believe I made the corrections you recommended, with the below explanations:


1. "I would change you open loop eq to something like what stock looks like." - Changed per post #2, if this is too high, what would you recommend?

2. "And you don't need as much fuel as your commanding in your power enrichment table." - Changed per post #2, what would you recommend?

3. "would also help you if you zeroed out your coolant temp spark modifier table." - changed, tune is attached, but have questions. If we are changing the ECT table, should we change the EGR and Catalyst as well to zero. Neither of these are present on the system.

Attached updated tune

[5FDP]

I like to use a Silverado Open loop EQ ratio table from a 2002ish truck. They generally have less commanded fuel at start up and it will have a faster transition to 1.00 (stoich) above 130-140 degree coolant temp. The F-Body computer will always have values greater than 1.00 just about everywhere and you have to change that to 1.00 at operating temp anyway when you start open loop tuning.

Find a tune from the repository and copy that information in.


Try thing for PE settings. Raise the MAP kpa enable to 80kpa, lower the rpm enable way down to like 1,200 or 1,400. The PE EQ Ratio should be okay if you commanded somewhere around 12.3-12.5 as you start getting things going. Starting off at 1.190 is a good bet and you can change it later if need be. If the difference between running a 12.3 and a 12.8 is a minimal gain in horsepower, it's not worth running leaner to me. Obviously a dyno would show if there was any gain.

[Cazbah362]

5DFP - Thank you for the insight and explanations , I did as suggested and update the EQ Ratio Table to a 2002 Silverado 6.0.

I also changed:
1. MAP to 80
2. RPM Enable to 1,300
3. Enrichment Ramp In to 1.1904

Attached is the updated tune

[Cazbah362]

Attached are some logs with the updated tune.

[Cazbah362]

Took it for a quick spin around the block to do a little logging. What I see is it is still lean, a lot smoother. What would your recommendations be?

[5FDP]

Tune it, everything from here is all on you.

Start with the MAF or VE table. Set it up for open loop tuning with no fuel trims/closed loop and use your wideband to calibrate the MAF/VE. They need to be done separate from each other and both require certain settings so it's in either MAF only or speed density for VE tuning.

[Cazbah362]

Thank you - what I needed to hear, will start this week.