203* stat

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Feb 14, 2010 | 07:12 PM

#91

twags6

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Joined: Jan 2001

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From: Slatington, PA

Haha, don't ya hate when that happens?

Feb 14, 2010 | 09:09 PM

#92

big poppa

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From: Lancaster, Pa.

I wished I had a before and after the 203* but I started this thread last year and did this test, you'll see how it was performed on the 02 and above trucks but my concern was my oil temps. Seeing my previous thread I have here https://www.ford-trucks.com/forums/8...test-done.html before RRE this was with normal driving up until I did this test on my instrument cluster, this is what my PCM seen, when it seen it, how long ago, who knows, I'm thinking the highest oil temp the truck seen its life, or recent. As you can see, the thread never went beyond #13 posts to get any answers to how this procedure worked, recent data, how and I certainly couldn't find anything on it so it pretty much died.. I just been informed by numerous people that those oil temps were to high. Maybe I jumped the gun not finding out all the facts and getting to the core of it before I made my statement that I'm ditching the 203* ..To be honest, heading down to RRE this past year, in 90* heat, my fan never came on anymore than before when I had the stock 295* temp in there at those temps.

Feb 14, 2010 | 10:02 PM

#93

spdmpo

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From: Suffolk, VA

Mike, I really think the difference between a factory stat and a 203 stat isn't even worth the brain power to give it a second thought. If I had a 203 stat I surely wouldn't muster up the effort to swap it out unless I was having issues.
Having said that I wouldn't purposely swap out the factory one for a 203 degree either. I dunno, just my view on it.

Feb 14, 2010 | 11:47 PM

#94

big poppa

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From: Lancaster, Pa.

I hear yaa Keith, I think I got a little paranoid, I really need to start thinking about more gauges, not because so much of this thread, just to monitor more of the vitals, all of them. I talked to Clay last week and he mentioned fuel pressure so thats my first line of business. Just out of curiousty, at normal operating temps say coolants at 190*, what should oil temps be at? I'm know oil is a bit higher in temps than coolant but by how much. Under normal operating driving. Back to searching..

Feb 15, 2010 | 07:13 AM

#95

MADVAN

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From: Levittown

Quote:

Originally Posted by ernesteugene

At T=2.5 minutes into the climb ...the truck using the 203*F stat hits 212*F ...and it then needs to run its radiator fan in full-lockup mode for the rest of the climb in order to avoid "overheating" ...and that causes "unnecessary" wear and tear on the fan clutch ...and running the engine at full load with coolant temperatures above 212*F also causes "unnecessary" increased wear on the engine ...and it also "unnecessarily" drains about 30 hp from the engine to run that fan ...which is hp and fuel that could've otherwise been used to climb the hill!

How did you get this 212*coolant temp for fan to lock?

Quote:

Originally Posted by ernesteugene

While it's true this particular analysis didn't show the engine with 203*F stat actually "overheating" and "blowing up" on this particular climb ...it did show that running its radiator fan in full-lockup mode just barely kept it from doing so ...and in my computer model ...if I dial up the ambient temperature from 90*F to a little over 100*F ...then the fan is required to keep the temperature of the 192*F stat truck in check ...and the temperature continues to climb in the 203*F stat truck ...even with it's fan on ...and the 203*F stat truck does "overheat" before the end of the climb ...and the 192*F stat truck doesn't overheat!!

And if you continued the test the 192/195 will also fail.
It just laggs behind the 203.
It has to due the the rate of heat increased as well as temp
of increase.
Your computer model needs adjustments!
Air flow and temp of the airflow alter what/when.
What is the the BTU of the rad at 55 mph/200* coolant?
CFM of rad at 55mph?
What is the safe max BTU a psd can produce under full load?
The fan clutch needs to see 205*F of air for the fan to
go 50% of the motors rpm.

Quote:

Originally Posted by ernesteugene

But I'd never post that version of the analysis ...because on this forum the "203*F stat mod" is evidently just as "ingrained" and "emotional" as the "6637 mod" is ...and I learned long ago that engineering analysis and reason will never trump "emotion" ...so this is my final post on this particular thread ...and in closing I'll use my "emotional side" to put into words how I really feel about the "203*F stat mod" by saying ...if anyone would care to buy some FL "swamp land" to go along with their "203*F stat mod" just let me know ...because I'm in FL now and I might be able to get you a deal!

Blowing Smoke now.
I for one dont give 2 chits on who has or sells t-stats.
They are all junk! They have short lifespans. The Behr-Thomson (german made)
seems to do the best job in the psd.

Iam not buying your computer model or land!

BTW- the more complete burn of your combustion = cleaner oil
Cleaner oil = longer lasting motor.

Keeping your egt's in check is the name of the game.
Bill

Feb 15, 2010 | 07:13 PM

#96

clux

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From: Carhenge

Quote:

Originally Posted by bfife

I still hold with the statement that airflow affects overtemp more than T/stats. if your truck is running hot while towing or even just running around do this.

REMOVE the radiator and pressure wash the fins until no more dirt, weeds, bugs an stuff comes out. you will be amaized at how much S**t gets caught there.

just washing it out in the truck won't do it, it has to be removed.
I've been towing heavy on a regular basis for 5 yrs now, north-south , east-west hot and cold. my temp guage very seldom even moves outside of normal. yes the fan comes on, but its supposed too! never for long just enough to drop that little bit.

Barney

X3.
You also need to clean your intercooler and AC condenser, and transmission cooler, which sit in front of your radiator. I notice an immediate difference in how often my fan steps up after I clean the radiator et al.. To the contrary, I didn't notice any difference in how often my fan steps up after I changed to the 203*.

Feb 16, 2010 | 08:39 AM

#97

HD Rider

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From: Glendive, MT

Actually I think Eugene's graphs are pretty good. It is true that with everything else being equal, the truck with the 203* will be the first to cycle the fan on. It is also true that the fan will draw HP that would otherwise be sent to the wheels. Note however when the fan comes on the temp in his graph starts dropping. Once the fan comes on in the 195* truck, it becomes an even race from there on. Neither truck actually overheats in his model.

It still does not prove to me that the 203* causes any harm.

Feb 16, 2010 | 09:54 AM

#98

MADVAN

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Joined: Feb 2004

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From: Levittown

The coolant flow rates are not the same between a ford, ih, or bob's 203 T-stats.
They flood the coil (rad), at different rates.
The B/T from IH has the most flow.

Bill