Super bad tune

[BeauRichardson]

I have a log that i made a couple days ago for someone who has been helping me diagnose an issue because unfortunately i do not know enough about tuning and all this stuff to really understand it to the level that it needs to be understood. Long story short, i'll post his response as well as the the log, and for anyone who is interested, the tune as well.

His response:

Hi, the tune is way too rich and the fuel system is still running out because of it. Afr is commanding .81 but its hitting .72. which is stupid rich. Fuel rail pressure needs to stay at 2900psi not drop to 2000psi. Injector pulse widths need to be under 6.0ms on Direct Injection motors. If they go above that then fuel is spraying outside the injection window. That means unburnt fuel is going out the exhaust and you are actually running lean even though it shows rich which is why you are getting knock retard with only 6 degrees of timing. The tune is a ticking time bomb.
So basically it needs leaned out so the high side fuel pump can keep up and to lower injector pulsewidths so fuel is injected on time which will actually richen it up since the fuel will be ignited on time and wasted out the exhaust. Then it will take a lot more timing without KR".

What exactly needs to be done? I am really trying to get a grasp on all of this. What needs to change exactly, as far as parameters, etc. And what changes need to happen? 2 test hits headed home.hpl2019 Camaro SS Fireball 2.hpt

[GHuggins]

What all's been done to the car - looks like possibly a cam from the tune and a blower from the log? Yes it needs to be leaned out - you're showing to be 10% rich in boost most of the time.

[BeauRichardson]

What all's been done to the car - looks like possibly a cam from the tune and a blower from the log? Yes it needs to be leaned out - you're showing to be 10% rich in boost most of the time.

BTR Stage 3 S/C Cam, tsp piston rod combo, flex fuel kit, fore innovation dual intank pump, lt4 highside and injectors, d1x procharger with a 3.85 pulley and the ati performance harmonic balancer on the crank pulley. Circle D 3600 stall. I think that's it off the top of my head. Has kooks 2" longtubes, non catted, no mufflers. I'm pretty sure thats it. I could be missing something but that is all the big important stuff.

How would one go about leaning it out? What steps would you take?

[Joshinator99]

BTR Stage 3 S/C Cam, tsp piston rod combo, flex fuel kit, fore innovation dual intank pump, lt4 highside and injectors, d1x procharger with a 3.85 pulley and the ati performance harmonic balancer on the crank pulley. Circle D 3600 stall. I think that's it off the top of my head. Has kooks 2" longtubes, non catted, no mufflers. I'm pretty sure thats it. I could be missing something but that is all the big important stuff.

How would one go about leaning it out? What steps would you take?

You really need to hook up with an experienced LT tuner. If you’re commanding .81 but hitting.72 then your base MAF scale is way off. Your engine is reading more airflow than you actually have. Any decent tuner would have fixed that right away. Im assuming you have an AEM wideband installed too?

[BeauRichardson]

You really need to hook up with an experienced LT tuner. If you’re commanding .81 but hitting.72 then your base MAF scale is way off. Your engine is reading more airflow than you actually have. Any decent tuner would have fixed that right away. Im assuming you have an AEM wideband installed too?

oh hey man, i forgot to email the log i am so sorry. it has been a crap show of a weekend. but yes aem uego

[Realizm]

I don't know if this helps, but I did a quick MAF alteration based on it running rich by comparing actual Lambda vs commanded and applying that to the MAF table. I didn't apply smoothing or anything. Hope this gets you in the ballpark (haven't tuned in a while so I'm rusty).

lb/min	0	750	864.7958984375	979.591857910156	1094.3876953125	1209.18371582031	1323.97961425781	1438.77551269531	1553.57141113281	1668.36730957031	1783.16320800781	1897.95922851563	2012.75512695313	2127.55102539063	2242.34692382813	2357.14282226563	2471.93872070313	2586.73461914063	2701.53051757813	2816.32641601563	2931.12255859375	3045.91845703125	3160.71435546875	3275.51025390625	3390.30615234375	3505.10205078125	3619.89794921875	3734.69384765625	3849.48974609375	3964.28564453125	4079.08154296875	4193.87744140625	4308.67333984375	4423.46923828125	4538.26513671875	4653.06103515625	4767.85693359375	4882.65283203125	4997.44921875	5112.2451171875	5227.041015625	5341.8369140625	5456.6328125	5571.4287109375	5686.224609375	5801.0205078125	5915.81640625	6030.6123046875	6145.408203125	6260.2041015625	6375	6489.7958984375	6604.591796875	6719.3876953125	6834.18359375	6948.9794921875	7063.775390625	7178.5712890625	7293.3671875	7408.1630859375	7522.958984375	7637.7548828125	7752.55078125	7867.34716796875	7982.14306640625	8096.93896484375	8211.734375	8326.5302734375	8441.326171875	8556.1220703125	8670.91796875	8785.7138671875	8900.509765625	9015.3056640625	9130.1015625	9244.8974609375	9359.693359375	9474.4892578125	9589.28515625	9704.0810546875	9818.876953125	9933.6728515625	10048.46875	10323.5537109375	10598.638671875	10873.7236328125	11148.80859375	11423.89453125	11698.9794921875	11974.064453125	12249.1494140625	12524.234375	12799.3193359375	13074.404296875	13349.4892578125	13624.57421875	13899.66015625	14174.7451171875	14449.830078125	14724.9150390625	15000	Hz
Airflow	0.0125830744390014	0.104540011210963	0.122119995205266	0.139699979199569	0.157279971078217	0.195998553903576	0.234717089422865	0.273435640710844	0.312154207767512	0.350872743286801	0.389591278806091	0.428309940474898	0.467028475994187	0.568038350622156	0.669048225250125	0.770058099878094	0.879604449335309	1.09512263857368	1.21057808376755	1.31129548073732	1.34809241218158	1.44533678676277	1.52004290995422	1.59034187357401	1.68914280706162	1.78725572107637	1.88568337813931	2.08288371119775	2.22706857384095	2.37863166951103	2.52972422747783	2.82425231994906	3.09950779361103	3.34697000539906	3.66654331863739	3.88654177109328	4.18032532910745	4.43695911547465	4.73700019419505	4.90472556615095	5.31106880716619	5.65186374927166	6.05025603844689	6.45504864958308	6.85633228571796	7.39151505737116	7.93917300718903	8.57695923726024	9.15433649979761	9.650572373766	9.96017558597426	10.4227588052423	10.7248858923974	10.816620812916	11.0222838864102	11.226917579835	11.4315906319096	12.063907523465	12.7011280990961	13.332125971288	13.9614899549188	16.5817315077644	17.2995616255953	18.6602769370275	20.0184632029166	21.3779553686193	22.1037409796729	22.8275526030639	23.5561760736814	24.2515566232339	24.9924176063236	26.1038311936917	27.2413425934078	28.3492825276398	29.4590248861894	30.6376287345977	31.9585655707203	33.287535608169	34.636027535875	35.6393582343479	37.2939514636339	38.6387456966593	39.9758821493252	42.5044836460901	45.0866532743099	47.6984084967599	52.4205987375054	57.210675584632	61.127854280041	64.7576179497181	68.5565834453135	74.9847269256315	81.3466186973256	84.5498799283636	87.7885599073583	90.1380411984774	93.3050601775031	96.4720710829596	99.639073914847	102.806084820304	105.97309572576

Experienced tuners may want to double-check my work above. If you do use that, work the way up the MAF table slowly when logging to make sure the changes are even remotely sane. If it looks like Lambda actual vs command is tracking 1:1, give it a rip. You'll want to check other stuff, like the E85 settings (didn't look at those, currently at work), and compare to a stock file to see what all was changed overall Let us know how it goes, curious to see how that car turns out. I run a similar setup myself, 2011 Corvette GS (LS3), D1SC w/ 3.6" pulley, E85, about 20 degrees of timing, LG headers, no cats, B&B exhaust, MSD Boost a pump, ID 1050X injectors. Curious how much power that Camaro will make once dialed in. At least once the MAF is dialed in you can see how it goes, and hopefully the fuel pressure PSI goes back up since it isn't needing to use as much fuel.

[itspeat]

I'm confused. If you are making boost, why did your tune file only go to 0.840 MAP/Baro on the VVE table when I opened it? Shouldn't the axis be set to 2 bar or is that just how it opened on my VCM editor by default?
Same thing with the scanner. The knock advance and retard histograms were not showing the entire range of data. so you aren't seeing the whole picture there. I'm new here and have never looked at boosted applications though so maybe that is normal to have to change those axis myself...
I filtered the LTFT tables to only show data below 35% commanded throttle actuator position to clean up the data.

Like I said, I don't know much but I am just going to think out loud here and try to point out areas that someone else can use their expertise to verify?

1. You are 10% rich in boost but overall you seem to be 5 to 10% lean according to the LTFTs. Could the ECU be "locking in" that 10% in the LFTFTs and carrying it over to the PE table?

2. Your PE table for alcohol is running richer than the PE Gas table. Is that correct? I thought alcohol was better at cooling so it could be run leaner under WOT?

3. The PE comes in at 35% throttle and the torque table is zero'd out which I am not sure if good but I don't know when your truck is in PE because it wasn't logged.

3. Your VCP spark table is zero'd out. Did you get rid of VVT with the cam?
I know zero'ing out the VCP table is common to remove tables that try to add timing and have more control over the base timing table but I only ask if you deleted VVT to make sure that you are aware of the VVT advance on the Low, Med, and High Baro airflow tables. (Airflow -> Variable Camshaft -> Intake Camshaft -> Desired Angle tables)