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post #1 of 10 Old 01-21-2011, 09:34 AM Thread Starter
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My delta test

So I got the insight hooked up and went driving.

Around town the highest difference I saw was about 7 degrees.

On the interstate it averaged around 8 degrees.

I decided to hammer it down and did a WOT run for about 1 mile. They stayed within 5 degrees of eachother while hammered down. HOWEVER, as soon as I let off, the ECT dropped a full 10 degrees and the EOT didn't cool down as fast. The highest delta I noticed was 13 degrees and that was immediately after I let off the go fast pedal. It slowly cooled down from there.

So, am I good to go or should I go ahead and replace the oil cooler prior to throwing on my go-faster tunes?
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post #2 of 10 Old 01-21-2011, 10:02 AM
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Quote:
Originally Posted by obsidian View Post
So I got the insight hooked up and went driving.

Around town the highest difference I saw was about 7 degrees.

On the interstate it averaged around 8 degrees.

I decided to hammer it down and did a WOT run for about 1 mile. They stayed within 5 degrees of eachother while hammered down. HOWEVER, as soon as I let off, the ECT dropped a full 10 degrees and the EOT didn't cool down as fast. The highest delta I noticed was 13 degrees and that was immediately after I let off the go fast pedal. It slowly cooled down from there.

So, am I good to go or should I go ahead and replace the oil cooler prior to throwing on my go-faster tunes?
To start with have you changed the coolant and ditched the Ford Gold Cxxp i think it is ok to have a spike in the temps but the right way is to run on the freeway 55-60 mph at one speed after it warms up that will tell you where you are on the temps, the oil will always be hotter 8 deg is a little warm but still ok.
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post #3 of 10 Old 01-21-2011, 10:17 AM
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Quote:
Originally Posted by obsidian View Post
So I got the insight hooked up and went driving.

Around town the highest difference I saw was about 7 degrees.

On the interstate it averaged around 8 degrees.

I decided to hammer it down and did a WOT run for about 1 mile. They stayed within 5 degrees of eachother while hammered down. HOWEVER, as soon as I let off, the ECT dropped a full 10 degrees and the EOT didn't cool down as fast. The highest delta I noticed was 13 degrees and that was immediately after I let off the go fast pedal. It slowly cooled down from there.

So, am I good to go or should I go ahead and replace the oil cooler prior to throwing on my go-faster tunes?

Your results sound like you already have a brand new oil cooler installed. 2 Stroker is correct in that the true test is what the temp differential is during a consistent run, and it sounds like yours is 7-8 degrees. That's about what mine runs, and I replaced my oil cooler less than a year ago.

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post #4 of 10 Old 01-21-2011, 11:05 AM
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No issues. The coolant will cool quicker than the oil. Totaly normal.

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post #5 of 10 Old 01-21-2011, 11:14 AM Thread Starter
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Alright.

Yes, this is the gold crap.

Yes, I have Cat ELC going in this weekend.

And I will run the interstate again just to make sure.

I figured the coolant will cool quicker thanks to the radiator and thermostat and the tiny oil cooler just doesn't have the cooling efficiency of a huge radiator. lol.

Thank you everyone for helping me out. I wasn't 100% sure I was ok but I had a reason in my head for the way everything was.
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post #6 of 10 Old 01-21-2011, 12:26 PM
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Those are about the exact same deltas I get. As the others stated, your good to go!

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post #7 of 10 Old 01-21-2011, 12:46 PM
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Quote:
Originally Posted by obsidian View Post
Alright.

Yes, this is the gold crap.

Yes, I have Cat ELC going in this weekend.

And I will run the interstate again just to make sure.

I figured the coolant will cool quicker thanks to the radiator and thermostat and the tiny oil cooler just doesn't have the cooling efficiency of a huge radiator. lol.

Thank you everyone for helping me out. I wasn't 100% sure I was ok but I had a reason in my head for the way everything was.
Part of it is the larger delta between the air and coolant. It is able to carry off more because of the larger delta. On the other hand the oil cooler is trying to pass its heat to the coolant which is only 10* or so of a delta. It can't absorb as much heat because of this.

Anyway, like everyone has said, you're running normally.
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post #8 of 10 Old 01-21-2011, 01:50 PM Thread Starter
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I love this site. At least I got some good baseline numbers for when I do my coolant flush in a couple of days. This will tell me if the flush has loosened up any crud that will get into my oil cooler. I got the coolant filter going on right before the flush so it will help catch any crap.
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post #9 of 10 Old 01-22-2011, 01:17 PM
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Obsidian I'm glad you posted this question with these numbers and got good responses. Reason being, I just bought my truck today and my delta ranges fall directly in line with yours!
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post #10 of 10 Old 01-22-2011, 07:01 PM Thread Starter
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Sweet! Test after the flush shows a max of 6 degrees difference so far.
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