Deltas question - Ford Powerstroke Diesel Forum

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post #1 of 24 Old 03-30-2012, 06:24 AM Thread Starter
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Deltas question

When not towing my deltas are 9 to 11 tops but when towing i consistently see spreads around 13 to as high as 16 does this sound normal also another note this is only when towing in hilly areas

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post #2 of 24 Old 03-30-2012, 06:32 AM
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when towing, your delta will be a false reading... You are at the higher end of the delta when your not towing though.. Make sure you are unloaded running at a consistent 65 mph on a flat ground after everything is at operating temp. Your ECT must be at 190 or above to get an accurate delta reading! Just keep an eye on it! You could try a throe flush and switch to a cat ec1 rated elc if you have not already done so..

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post #3 of 24 Old 03-30-2012, 09:05 AM
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I've seen some delta's like that when towing, don't worry about it. Drive your truck steady at about 60 mph after you are up to temp 190. After several minutes of steady driving check your delta's to see where you are.

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post #4 of 24 Old 03-30-2012, 09:25 AM
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The 15 degree delta rule does not apply when towing.

Its only when cruising 60-65mph unloaded

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post #5 of 24 Old 03-30-2012, 12:47 PM
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I have a brand spanking new oil cooler and my delta is 9°. I would say your right on the money. No worries.

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post #6 of 24 Old 03-30-2012, 05:11 PM
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My delta is also 9* unloaded. I was worried when I first got the truck because according to some people on this forum it should be less than 5 if you have an oil cooler in tip top shape, but after owning the truck for over a year my delta hasn't changed a bit. I've been gathering parts for the EGR delete and oil cooler swap, but I'm not in a big hurry to do the job. If my delta gets worse I'll be ready though!

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post #7 of 24 Old 03-30-2012, 05:16 PM
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Originally Posted by Razorsedge View Post
My delta is also 9* unloaded. I was worried when I first got the truck because according to some people on this forum it should be less than 5 if you have an oil cooler in tip top shape, but after owning the truck for over a year my delta hasn't changed a bit. I've been gathering parts for the EGR delete and oil cooler swap, but I'm not in a big hurry to do the job. If my delta gets worse I'll be ready though!
Mine is 9° & is brand new. It doesn't really get anymore tit top than that. I am beginning to think some trucks just run hotter than others.

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post #8 of 24 Old 03-30-2012, 05:22 PM
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Getting an accurate "delta" reading can be goofy. Coolant temps will fluctuate much more quickly then EOT temps. Normally with a good coolant system and a healthy oil cooler the delta will be within a couple degrees of each other when driving 60mph unloaded. Most trucks will run around 185-190 ECT and EOT should be close to this, during normal driving conditions.
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post #9 of 24 Old 03-30-2012, 05:29 PM
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How close are the sensors in the morning w/ KOEO?

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post #10 of 24 Old 03-30-2012, 05:31 PM
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Originally Posted by bismic View Post
How close are the sensors in the morning w/ KOEO?
I have heard they are supose to be the same. But now that I think about it mine arnt.

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