I have Don's book, and he uses the process he describes in it to set up your car.
He wants feedback from your datalogs to see if the 'base' program was close, then goes from there.
The big diff between that and a dyno tune is the wideband data.
A tuner will use a wideband to see exactly what your car is doing when, and will tune with that input.
A datalog only sees what the car sees; a wideband sets that relative to the real world.
To tune by mail, as it were, he has to assume your car doesn't have other issues that will affect the response of the car's systems; with a wideband looking at the results, you know there are issues that can't be tuned around.
I wouldn't try to use my prp without having a wideband; a bad sensor could cause errors that would cause a tune to eat an engine in a heartbeat.
Pretty much as soon as you hit wot, lol.
The Best Thing would be to catch Don at one of the tune sessions he does in different places, and pay him to dyno tune your car.
Jerry W. is the man, but hard to find...
Red '96 Cougar XR-7 240k mi. '02 4R70W, PST DS : '03 PI engine, 04 maf, 24lb injectors, 2.5" exhaust, '02 4r70w + Jmod, DirtyD0g TC + cooler + 3/8" lines, 255 walbro fp. Alpine system.
Black '96 Cougar XR-7 (Lazarus) 210k mi PI Intake, '02 4R70W, Jmod, PST DS, GrogTune, Konis, Mark LCA+Poly, racecougar Custom Engine Chain, and JL and racecougar Bracing.
Black '97 Tbird Limited Edition, '02 4R70W, 255 walbro, PST DS, PBR Brakes&SS lines, Toicko Blues & Springs, GrogTune.
I'm not Human enough to be human; but I'm trying to fit in, and I'm learning to fake it.
"Never said Hibbity..." - Brian Williams