anybody now or have stock timing table for a 04 lm4 5.3 motor? need some help on a tune. what should timing be at launch? I have put 20 degree's of timing in the hp-tuner tune in my 04 rainier and the truck still feels flat out of the hole! the stock timing in this truck was a whole 11 degree's!!!!!! i have been trying to do some research and i've heard 28 degree's would be cool. at 20 degree's and 87 octane there is no kr at all!! after the truck get going it really feels a lot stronger! just want more grunt out of the hole!!!!! anybody?

 

i dont know anything about the timing.. but you got rid of the Tm?

 

yes, all off it and with 20 degree's of timing at the launch and zero kr, still flat. i don't know if it has something to do with the drive by wire trottle body. i didn't find any tables to mess with.

 

very weird.