Before I jump in, I'm not a professional tuner and I just love old gmt800's. I don't plan to tune for the public, don't wanna tune for the public and don't want the headaches of that business or clientele. All that said, truck is a 2002 2500HD (factory 4.10/6.0/4L80E 4x4) with 6,500lbs of CHONK to push around.
Engine is new, finished a couple weeks ago. LS3, Hooper Heads, 220/230's cam and 10.8:1 compression on pump gas (very tight quench) with 1 3/4 ARH headers, factory muffler, factory airbox from a 2013 (better maf) and a gen 4 square port factory intake with 50lb injectors.
The engine does well and feels like it's mapped out correctly, but my problem is the drivability. With the added cubic inches, high compression and small cam this shouldn't be so absolutely lazy. 406rwhp/388rqtq down in Victoria, Tx on a Mustang dyno. Looks great on paper, drives like butt. Transmission does strange things.
Absolutely abysmal acceleration unless you're just flooring it (light switch acceleration) and the transmission feels odd sometimes between 2-3, has random bumps and flares and has other odd quirks.
Transmission has dual feed mod and 3000 stall triple disc Circle D converter. Edit: I have two identical built transmissions, both dual feed mod, rollerized, etc. I have one Circle D triple disc 3K stall and a Precision triple disc 3K stall that are rotated out between transmissions being killed. So far, I've killed 3 transmissions. 2-3 clutches roasted, TCC applying converter at idle when hot (stalls out engine) and I blew the snap ring off the drum in the 3rd. Whatever I'm doing on the tuning side to the trans is murdering transmissions.
ReveilleLS3.hpt
File above correct, file below incorrect.