# Any Interest In a Dyno Tuning Session?

**URL:** https://forums.speedlife.net/t/any-interest-in-a-dyno-tuning-session/203982
**Category:** PittSpeed Automotive
**Created:** [October 20, 2009, 9:49am UTC](https://forums.speedlife.net/t/any-interest-in-a-dyno-tuning-session/203982 "2009-10-20T09:49:29Z")
**Posts on this page:** 1
**Showing post:** 87

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### Author: ![edcmat-l1](https://avatars.discourse-cdn.com/v4/letter/e/e19b73/32.png) [@edcmat-l1](https://forums.speedlife.net/u/edcmat-l1)
#### Post date: [November 5, 2009, 8:51am UTC](https://forums.speedlife.net/t/any-interest-in-a-dyno-tuning-session/203982/87 "2009-11-05T08:51:07Z")

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> [@Your Best interest - Threads you shouldn't Start](https://forums.speedlife.net/t/your-best-interest-threads-you-shouldnt-start/41530/8):
>
> Ya, how exactly does cmr work? You Tune on the computer, save it as a .watever file and put it on my predator so its always on there in case i need to put it back to stock but later on can go back to the cmr tune?
> 
> im very mild mods, Hot air intake,catback exhaust (lost low end torque), and the predator.

You got it almost exactly. You do a custom calibration with CMR, which is a complete editor type program such as HPtuners or EFIlive. You then save it to the Pred, and upload to the car from it. You also use the Pred as a pass-through device for datalogging.

You’ll always have your stock tune, and the custom cal file.

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