What level to run
 

I just received my Gryphon on Mon and I was waiting on the weather to warm up (its been staying in the teens here) before I installed it, until I found the post on Programming in cold weather, which answered my first question.

So my next question is what level to run on? I'd like to start out on level 3, I already run 91 and sometimes 93. Will it hurt anything to drive the truck on level 3 until I get the custom tunes?

Not at all - go for it! :2thumbs: If you DO run a tank of 93 octane gas, you can probably increase your timing by 1 degree over the "standard" setting that the level 3 tune gives you too.

Have fun!

- Jack

Thanks I can't wait to get started. Although now I don't think its gonna be until Thursday, supposed to get 10 to 12 inches of snow tomorrow....I can't wait to move back down South.

In regards to the programming in cold weather, what we are directly referring to is the actual temperature of the PCM, not the ambient temperature.

As long as the engine has reached operating temperature (ie. engine is warm, battery is warm, PCM is warm) then reprogramming is fine. What you do NOT want to do is jump out at 7:00 am after the truck has been sitting all night at 5º F and try to program your truck as there is a good possibility of a programming failure. Of course, once the PCM is pooped you don't have any way to really warm it up until spring rolls around. That, or a hair dryer! :hairdry:

Take care.

Hair dryers are good for something, eh?

- Jack

I would run on #3 as you usually get a little better economy along with the power. Plus it is just more fun.:woot: Also agreeing with Jack that running a higher octane, like 93, would allow more advanced timing resulting in some more power. What's not to like:2thumbs: