ECT vs EOT - Page 4 - Ford Powerstroke Diesel Forum
6.0L Ford Excursion Discussion This forum is for topics relating to the excursion only.

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post #31 of 33 Old 03-21-2017, 10:22 AM
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Opps - screwed up - that should be oil temp will drop at the lower RPM
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post #32 of 33 Old 03-21-2017, 11:27 AM
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Yes, egts play a huge role in this. Towing my camp trailer uphill I'll hit 270 while in 4th gear. The truck likes to pull hills in 5th. I use a 475 rwhp tune and it makes 40 lbs pulling hills. I'm just no fond of overdrive on long grades with 18k on parachute in tow. I do notice when in overdrive egts are around 1350 but oil stays around 240, when in 4th it's 1170-1220 but oil skyrockets to 270.
It's got a factory oil cooler as well as the fluidyne cooler frame rail mounted with fans. I usually test oil coolers by running them in 3rd at about 45 mph. Just had one hit 18* on me. 194/212. Sad part is, fella said he just spent "10k on bulletproofing the truck".. all I see is a crappy egr delete kit done to it, and stock head bolts. Not even an up pipe, just a block off plate.
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post #33 of 33 Old 03-21-2017, 02:49 PM
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Quote:
Originally Posted by 2001 f350 cc 4x4 View Post
Engine oil heat source #1 RPM - churning / shearing the oil #2 underside of piston
Try running 62 mph in 3rd - about 2500 rpm then try same speed in OD - about 1775rpm
Same road load - lower internal losses - less coolant flow - EGT should increase - but the oil temp will drop at the lower RPM
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Yes, egts play a huge role in this. ...
Thanks for this, guys.


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Originally Posted by Nickjames525 View Post
... Sad part is, fella said he just spent "10k on bulletproofing the truck".. all I see is a crappy egr delete kit done to it, and stock head bolts. Not even an up pipe, just a block off plate.
That happened to someone on here. Posted a pic of his engine bay when asking a question after thousands of dollars of "bulletproofing" and one of the other guys spotted the stock torque-to-yield bolts. Goes back to our earlier discussion but the case when bad diagnosis becomes bad behavior. As you said, sad.

2004 F550 CC Lariat
BPD oil cooler relocation and upgraded EGR cooler (spooled), BPD oil bypass filtration, aFe Magnum Force CAI, Mishi radiator, 7.3L fan clutch, EC1 ELC, XDP coolant bypass filtration, '08 trans pan/filter, PTP direct clutch solenoid, blue spring, 6.4 starter, MBRP y-pipe, BD boots/clamps, '05 intake elbow, ccv reroute, Torque Pro + OBDLinkô LX, Autometer EGT
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