96 Lt1 4x 411 swap

[BishopTS]

Ok i have a 96 LT1 t56 that i did a 411 pcm swap on, wiring is very easy but im very new to programming. ive got the car running and driving but i feel like it is just a little sluggish. for the most part i used a 5.7 express tune but it seemed to idle better if i just copied the 2002 camaro idle section.
i ended up just backing the entire spark table down on high and low octane to make sure i didnt have spark knock when trying to get fuel trim in. i ran pretty ok like that and when i raised the timing back up it ran better except at higher rpm where it was spark knocking. so i backed it back down and thats kinda where i am now. do i need to just start over from square one or at least build a spark map from scratch?
the car is completely stock. i have a wideband but i dont have anywhere to install it because of the cats so longtubes are next on my list of parts to buy.

[blindsquirrel]

Forced open loop but with no wideband. No way to tune it like that, have to have either working fuel trims or a wideband.

PE is effectively disabled with that sixty-five second delay under 5200, and the 90% throttle requirement...

The VE is... not good.

Yes, you need to start over but next time make changes based on data, not vibes. To do that you will need a whole bunch more channels in your logs. For just one example, how have you been figuring out where in the timing map to add/remove, if you aren't logging Cylinder Airmass?

[BishopTS]

i watch the VE tables for cylinder airmass since im not using a mass airflow sensor. i raised the timing and looked for knock and backed it off in the places where i saw knock.
you know as well as i do the tune is garbage but i never had a solid place to start from so being new to this has me at a disadvantage. i can pay someone to do it and i will have good car but i will have learned nothing. so i dont mind grinding through this till i get it right. everything ive learned was from youtube and every one of those videos were starting with a tune that worked with the engine they had and they just changed a cam or added a turbo. i dont have that since this pcm/engine was never a thing so if im going to start from scratch ive got to build from scratch to start from first.

[BishopTS]

thank you for your reply. its much appreciated.

[BishopTS]

looking at that file vs the stock express van they both have PE disabled thats just what it was at when i started so i didnt really know to change it. i copied what the 2002 camaro does for PE since i dont really have anything else to get a starting point for it from.

[greezemonkey]

looking at that file vs the stock express van they both have PE disabled thats just what it was at when i started so i didnt really know to change it. i copied what the 2002 camaro does for PE since i dont really have anything else to get a starting point for it from.

Here for comparison sake is a 97 LT1 T56, had a torque head 0411 pcm swap, 383 6 inch rod, 11.3:1 Advanced induction trickflows, LE ported intake 52mm TB, 223/231 595/595 on a 113, 1 7/8 stepped headers, 3.8 supercharged injectors, stock fuel pump / pressure

[SiriusC1024]

That tune needs a lot of work.