Newbie with LSA and 4L80E

[sn1088]

Anybody willing to share their trans tune to get me going on tuning my trans? Or, any tips advise for shift points, lockup (trying to find sweet spot for shifts and reduce heat during around town driving if possible, heard locking converter sooner might help)?

I have a LSA and 4L80E in my Chevelle. Car has 3.73 gears, 2800/3000 stall converter, 27? rear tire, Brian Tooley Stage 2 blower cam as well. Currently have a stock 4L80E tune (E38 ECU/4L80E TCU, trans is originally from an Express van). Cam specs are (if curious/needed):

------- Camshaft Specs @ .050 -------
Intake Valve Lift = .614
Exhaust Valve Lift = 0592
IntOpen= -2.50 IntClose= 49.50 ExhOpen= 69.00 ExhClose= -7.00
Intake Duration @ .050 = 227.00 Exhaust Duration @ .050 = 242.00
Intake CenterLine = 116.00 Exhaust CenterLine = 128.00
Compression Duration= 130.50 Power Duration = 111.00
OverLap Duration = -9.50 Lobe Center Angle (LCA)= 122.00
Camshaft Advanced = 6.00 degrees

[lukearmstrong1990]

Post your file

[sn1088]

What I'm experiencing now is with WOT pulls from a roll, the car will buck (feels almost like if you were to put your foot to the floor, lift completely off pedal, then apply pedal fully and taking it off again). It bucks pretty good (my friend did a quick datalog and it looks like spark drops to 0 during the WOT sections, weird). The fuel and other areas look ok though. Any thoughts (friend thinks it's something on the ecu side that needs to be adjusted as opposed to the tcu)?

[sn1088]

Anybody have suggestions? I’m going over to friend’s place were car is in next day or two with hopes to mess with tune in HPT.

[DGS]

Post a log.

[sn1088]

I’ll work on that over next couple days. Been raining quite a bit. Waiting for a clear day.