From all the info posted above I think I am satisfied with my marginal 1 MPH difference

Ok thanks!

So I'm running 275/70-18 BFG AT and their website has that size at 33.2" tall...entered both the sidewall info and actual measured height and in both instances my speedometer is off by ~1-1.5 MPH (needle says 75MPH, GPS says 74MPH)

Should I even worry about this difference? It seems so small to not ...

Had a U7194 for years but I have the opportunity to get a slightly used inTune for a steal. Outside of the obvious advantages, are there any fundamental differences/advantages to the tune files with the inTune vs my old Predator?

I'm looking forward to getting rid of TCM and adjusting my shirt ...

OK thanks! Once everything is dialed in, if I decide to change tunes in the future, the parameters stay the same regardlesss of what tune file is in the truck...thinking about running the Diablotune after this tank of fuel is gone

Good morning!

Ran at data log yesterday and made a +3 slope adjustment on my '09 Silverado w/ 5.3

I know the adjustments have to settle in and will log again next week to verify everything is in order, but my question is this: how often should I check these parameters in the future? I dabbled with ...

I know the advertised benefits of the inTune and what it can do that the Predator cannot, but in y'alls experience is it worth the extra $$$ coming from a Predator with a Diablewtune already in place?

My truck is a 2009 Chevrolet Silverado 5.3 w/ 6L80e

Not trying to build a racer, just improve ...

I second this...

Finally sent the man my money and what I got in return was worth 5X what I paid as far as drive-ability and performance gains

I am about to have a custom tune done by Lew and so I ran a data log to verify everything was in order before exporting and emailing the files to him...I thought I had everything dialed in but now today Redux is telling me to adjust by -4, putting me at -1 (I'm at +3 now)...about a month ago it ...

Will there be an update for the Predator for full TCM support?

Recommendations anyone?

I meant injector slope, sorry

Haven't touched the spark adj

Also, just as a side-note, the previous log was ran under similar conditions (dry, +100 degrees, smooth interstate)

Been running the 87 Octane Tune in my '09 Z71 with fuel levels dialed in (+2 on spark advancement) for a couple months now. Just for kicks today, I ran a log running at 75MPH on smooth interstate to get my RPMS in the 1800-2000 range in the dry, 103 degree TX heat to confirm that everything was ...

OK thank you...so the adjustments that got me dialed in running the MPG tune are still valid running the 87 Octane tune?