Hi all,
Just want to thank everyone on this forum for the plethora of information they have provided, and the maturity compared to other forums. A brief bit about myself since this is my first post, I'm a local dyno tuner in Gainesville, Fl that has experience tuning MegaSquirt, Hondata, AEM, and numerous other standalone SD systems. This is my first LS1/Auto/MAF car and am doing it for a buddy of mine. A little about the car: 1974 Corvette with 02 LS1/4L60E, mild cam (unknown specs), Long tubes, Flowmasters, and a less than ideal intake tube setup (Maf connected directly to short stack filter). My buddy said after they had the car built they went to have it tuned, tuner said the TC was bad so they replaced it with a 3200 Stall (Not sure of brand). Before I fix the intake/retune the car, I wanted to diag the trans/tune, because on the road it slips really bad if you give it any sort of throttle >30% TPS. I have purchased several pieces of information to help me through the tuning process, Greg Banishes Basic DVD, Master EFI Tuner by Lasota Racing, and "Tuning the Right Way". When it comes to tuning an automatic, I have little to no experience, mostly trial and error and following the "definitely don't do this" rules of thumb on here. I have tried the trans settings from a stock 02 camaro map, the current map that was on the car from the previous tuner, and tweaking a stock map with recommendations from the Cool-aid write up, but it just keeps slipping. I'm unaware exactly what to look for on the log files to know 100% if its the trans, TC, or the tune. Could someone please help me as I am trying to get this thing done and move on! An explanation of how to use the logger to diagnose the issue would be the best info. I have full access to a DynoDynamics 2WD eddy current dyno if that would help. I am using HPTuners 3.0.120 (latest version), and the slipping can be seen from 1:03 to 1:12 on the log file. I am uploading the original tune as well. Thanks in advance!
74 Vette LS1 Original Tune.hpt
Slip.hpl