Interesting inside info

[Tsgs69400]

I was talking with a local 6.7 tec last week about the new motor, which he had nothing but praise for, and he told me a handy piece of info for the potential 6.7 buyer.
From what he said the trucks come from the factory de-tuned for the first 500 miles. Thus if you test drive one that's below that you really don't get the true appreciation for the advertised power. So for those of us aspiring to make the change, he advised to try like crazy to test drive one with over 500.
BTW, this power change happens automatically once 500 miles has turned on the clock. This is a separate upgrade of power from the re-flash that many already know about. And as a side note the reason that he likes the 6.7 so much is that they have not had one in the shop for any repairs yet, while they have done nearly (50) 6.4 motor replacements/rebuilds already.

[powerhoghp]

Is it going by the mileage or is it going by a certain # of regens or runtime hours?

[ups 6.0]

Originally Posted by Tsgs69400

BTW, this power change happens automatically once 500 miles has turned on the clock.

[IFlyEm]

Must be the reason why it isn't recommended to tow until you have 500 miles on the truck.

[vrsc]

Would like to heat more concrete info on this.... This is the first I am hearing of this and no one else hs said anything about noticable power difference

[jstange2]

I would have to agree. 900 miles right now. The wife and I were out with it last night and I had to play a couple of times. It was definitely different than 800 miles ago.

[jimchris]

I have 3000 miles on and didn't notice any change.

[jleach1985]

I just rolled 500 miles this weekend and haven't noticed much of a difference. I've been babying it though so that could be it too. Only really hammered down once or twice.

[Tsgs69400]

This is just what I was told by the tec that i know who just got back from classes to update his knowlege.

[richc22a]

Originally Posted by jleach1985

I just rolled 500 miles this weekend and haven't noticed much of a difference. I've been babying it though so that could be it too. Only really hammered down once or twice.

I have only hammered down on mine once or twice.... each time I have driven it!!! The manual says to vary speeds during breakin, so I varied it...wot; 0-95, 0-65, 70-95... no problems!!!! I am looking forward to seeing what transpires between 65-80,000 miles as I anticipate break in to occur somewhere in this mileage range. My 7.3 finally relaxed at 65-70,000 with mileage and power increasing.