Different Tunes different Deltas (ECTvsEOT) - Ford Powerstroke Diesel Forum
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post #1 of 11 Old 01-05-2012, 08:38 PM Thread Starter
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Different Tunes different Deltas (ECTvsEOT)

I drive the same route to work every day. Its socal, so the weather is pretty constant, and there is usually no wind. I have noticed that I get different Deltas depending on which tune I run, with all other factors equal.


Not drawing any conclusions here, just my observations:

Stock: would run EOT 196-197 ECT 190 driving 65ish unloaded on my route (30 miles 1 way)

Extreme Street: runs EOT 198-200, ECT 190-192 same conditions

Looney: Runs EOT 197, ECT 190 same conditions


Seems to me that looney gets up to temp faster, and rises quicker when I get on it a little bit, but overall the EOT is slightly cooler than extreme street.
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post #2 of 11 Old 01-05-2012, 09:15 PM
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Mine run consistant about 0-3 degrees out on what ever tune I run from stock file to my race tune.

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post #3 of 11 Old 01-06-2012, 02:32 AM
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I really can't see that small of a difference as being anything more that normal variation.

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post #4 of 11 Old 01-06-2012, 06:09 AM Thread Starter
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I disagree - its noticeable. But then again Im completely fixated with looking at the stupid scangauge.....dang these trucks make us hypersensitive
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post #5 of 11 Old 01-07-2012, 09:02 PM
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I have a dumb question: what is a delta I hear it spoke about a lot....

2008 f-350 CCLB,
Rough country 4.5" radius arm drop lift
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looney street from vivian
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post #6 of 11 Old 01-07-2012, 10:27 PM
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When you see delta on here, it's usually referring to the difference in engine oil temp and engine coolant temp. (EOT & ECT)

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post #7 of 11 Old 01-08-2012, 10:54 AM
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Spartan I run a 2 degree delta and x race I run 4 degree delta

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post #8 of 11 Old 01-08-2012, 11:05 AM Thread Starter
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That's prett low, but you have egt delete..... Is the ect temp sensor downstream of the egt cooler? Does that make sense?...
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post #9 of 11 Old 01-08-2012, 11:54 AM
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Well when you say "everything else equal", what do your EGTs average with each each tune?? I would submit to you that if you have a tune that runs a higher average EGT than say stock, which is usally the case with any performance tune; then you will have higher oil temps with that tune. (Kind of like towing) Either way I wouldnt be worried about it. JMO.

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post #10 of 11 Old 01-08-2012, 01:09 PM Thread Starter
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I don't have an egt probe, just equal in terms of speed, conditions, load, etc etc. I was mostly trying to compare looney to extreme street, for me it seems like eot stays lower with looney when just cruising.
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