predator p/n u7194. rev.V.9r14 2009 chevy 4x4 5.3 flex fuel . Mods: cold air intake, flow-thru catback ext duals.
I installed the 87 octane tune on Monday it smoothed out the motor and better low to mid range torque. Kudos on the program.
What I need to about the 87 octane tune is:
1] Did it change the shift points ?
2] Did the speed cut-off at 98 mph get changed to a higher mph?
3] I'm planning on running headers, long tube with cats if I can find them , or it will be shorty's.Will the 87 octane support it change ?
I live in Tucson.Az, The alt.here 2500 ft and drier air most of year.Most cars and trucks run a little rich less dense air.How well does the programer support this desert area? Can I change shift points and speedo cut-off higher and maintain 87 octane tune. I will also be going to a 33" tire in the future. Can I make these changes to the 87 tune and how do I do this . The instu. manual does not break it down. I don't want to start pushing button's without the understanding of the system. I work on jets and watch people push button's without maintance's maunals and mess up the ecu's I don't won't to be that guy.
Thank you for any help you can provide.
Lanny
