New to Tuning, first LS Swap. Check my work, Do I need to start over?

[67-Sportwagon]

Hello, I have swapped a "LS1/6" crate motor that I bought second hand from someone that had an unfinished project from 2016. It was from an older gentleman who did not have any documentation other than it was a "410 hp LS1/6". Block code is LS6/LSA, it has an LS1 manifold, flat top pistons, 706 heads for more compression, unknown cam (guy said LS6 but no proof) and shorty headers. It was new, still in the crate. I mated it with a 4l80e and have it in the car and running what seems like good. I have been reading and studying everywhere I can to learn more and try and get my tune closer. I have a Howell reprogramed ecu and harness that came with the motor that I used as a base tune. it started and idled first crank. It was a 5.3 truck tune that I added and segment swapped for the 4l80e, changed my motor size and volume, egr delete, fuel system etc. I was able to get my fuel trims under 5% with minimal MAF and VE tuning. I have a wideband and plan on spending some time to get the LTFT's under a percentage or two. I have not started to tune spark yet I noticed my advance seems super high compared to stock tunes. I only have 91 octane in my area so I will be bringing it back down a bit, but I am only getting a tiny bit of KR under full uphill acceleration.

Here is my current tune and a 20 mile driving log. How does it look? Any red flags?

it runs good but seems a bit low on power? I am starting to think I should have started with a stock ls1 or ls6 tune and gone from there as when I compare to those tunes I am different on almost every setting?

Should I continue honing in on perfecting this tune or should I start over with a tune that is closer matched to my engine?

[horsepowerguru427]

General rule of thumb is to start fresh with a stock tune. Why not run an LS1 tune from an f-body or an ls6 tune from a vette?

[67-Sportwagon]

General rule of thumb is to start fresh with a stock tune. Why not run an LS1 tune from an f-body or an ls6 tune from a vette?

That is my current thinking as well. When I started learning all this stuff last month the idea of starting over with a stock tune seemed too scary and hard to figure out. now, im pretty sure I could pull it off?

only fear I still have is that a lot of tuning was done to that computer that came with the motor. I don't know what cam and injectors they used?


Thanks

[horsepowerguru427]

https://forum.hptuners.com/showthrea...e-(w-pictures)
https://www.performancetrucks.net/fo...tricks-373848/

These links should help you some.

[67-Sportwagon]

I would still really appreciate some feedback on my current tune to see if anyone has any comments or feedback?

I am thinking I will try and find compatible stock files for a LS1 or LS6 tune that will match my OS and be compatible with a 4l80e segment swap. then just try it and see how it likes it?


Thank you

[edcmat-l1]

Don't look too bad. Definitely should take a couple-few degrees out of the WOT timing especially for 91. I would start with an LS6 timing table.

[SiriusC1024]

You should dial in the airflow models (MAF, VE). Set O2 sensor crossover Rich/Lean vs. Airflow to 451mV across.

Like edcmat said, LS6 table and 3-4* below where it is a WOT. Zero out Fuel Base spark corrections. Double check the other modifier tables.

Verify gear ratio and tire size through Edit>Gear/Tire Change Wizard. Do some adjustments to shift and lockup settings.