My question to those who got a mail order tune, have you gone back for a dyno tune?
I gained 5 tenths after my dyno tune..my A/F was all screwy with the mail order tune. (Don't ask me where I got mine...I'm not bad mouthing any company...just relating my experience)
XCAL2
Pros...Data logging (if you know how to read that stuff. You can get acurate RPM, water temp readings and such),
Ability to tweak parameters and adjust for gears/tires (Good for weekend warriors or semi serious drag racers...not so much for the DD),
Code reader (gives you the code...need to have a copy of what each code means), Updates and new tunes can be emailed and loaded with your computer.
Cons...You have to shut down car to change tune (removing the fan and fuel pump fuses) If you have a 96 or earlier car you have to disconnect the battery to "reset the adaptive memory" or something like that.),
No user manuel...there is one for download but is very basic. Nothing on how to read the datalogging features or even what all of the parameters than can be read mean.
All of the functions are not available yet. The last I heard the on-board datalogging is still not working. May be updated now...if not you have to have a laptop.
Mine was kind of finicky...there was a loose connection that would cause the buttons to quit functioning. Something about a short in the wiring that required you to remove the button cover and put some electrical tape in the problem area. I never tried to fix it...just traded it in. This was a common problem with the early units. That has been fixed in the later ones.
Switch chip
Pros...Switch tunes on-the-fly. This was the biggest drawback of the Xcal2.
Switch can be located anywhere for easy access.
Set and forget...best for the daily driver and occasional runs at the track.
Cons...No user adjustability. You have to take it back to the tuner to change parameters.
None of the data logging functions of the handheld...if you have a semi serious drag jones you won't be able to tweaks between runs.
Go here to find more info on both items...
http://www.sctflash.com/forum/index.php?