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#87241

12-25-2013, 05:03 PM

KingRanchCoy

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Quote:

Originally Posted by 88racing

1 octane point ain't going to make that big of deal.....but what size is the gas tank??? canned tunes are a bit more forgiving and conservative than custom tunes...imo

rule of thumb before switching up in octane in the tunes is change tunes on the 2nd tank of the tune you'd like to run....

its the 26 gallon tank. so has 3 gallons of 87 then the rest is 92.

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#87242

12-25-2013, 05:18 PM

Patman

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Merry Christmas yall

I texted Coy about it, but basically the PCM will pull timing if necessary to keep engine running at optimal conditions for what ever octane is in the truck

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#87243

12-25-2013, 06:23 PM

88racing

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Quote:

Originally Posted by Patman

Merry Christmas yall

I texted Coy about it, but basically the PCM will pull timing if necessary to keep engine running at optimal conditions for what ever octane is in the truck

I'd play it safe....change tunes on the second tank...imo

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#87244

12-25-2013, 07:11 PM

Patman

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The tune opens up the ranges on the parameters. The PCM still decides where and how to operate

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#87245

12-25-2013, 09:59 PM

JohnBoy88

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On a completely unrelated note, I ate so much today I feel like I'm going to explode. Three different Christmas dinners with three different families. Good lord.

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#87246

12-26-2013, 07:35 AM

88racing

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#87247

12-26-2013, 07:41 AM

dsq3973

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#87248

12-26-2013, 07:41 AM

88racing

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Quote:

Originally Posted by Patman

The tune opens up the ranges on the parameters. The PCM still decides where and how to operate

canned and custom tunes narrow the parameters for a given octane....you can go up with higher octane on a lower octane tune but not lower octane on a high octane tune...

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#87249

12-26-2013, 09:53 AM

KMAC0694

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I always run a few 5-10 gallons baby fill ups of 93 prior to switching the tune when I have a full tank of 93 in it. I run the 87 all the way down and then do the same with the baby fill ups.

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#87250

12-26-2013, 10:03 AM

dsq3973

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All this discussion about octane ratings and tunes makes me like my diesel even more. The only thing I have to worry about is if I accidentally put Off Road diesel in it.

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#87251

12-26-2013, 10:50 AM

Bluejay

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Quote:

Originally Posted by dsq3973

All this discussion about octane ratings and tunes makes me like my diesel even more. The only thing I have to worry about is if I accidentally put Off Road diesel in it.

Sounds as if you're searching for some reason to like your diesel!

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#87252

12-26-2013, 11:19 AM

dsq3973

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Quote:

Originally Posted by Bluejay

Sounds as if you're searching for some reason to like your diesel!

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Not at all. I have lots of reasons to like diesel motors over gas so it's just more of a confirmation than anything else. Heck I can run my truck on Jet-A if absolutely had to in a pinch.

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