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04-06-2009, 12:49 PM
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CC Member
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Join Date: Apr 2000
Location: Leesburg, VA USA,
VA
Cobra Make, Engine: Contemporary, 427 FE Center Oiler w/ 48 IDA Webers
Posts: 238
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Not Ranked
Quote:
Originally Posted by madmaxx
Excellent find, anything below 180f and you are wearing your engine out.
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What does this mean? As long as the oil pressure is up and correct, why would a colder engine "wear out"? Actually you'll get better performance from a cooler engine. |
04-06-2009, 12:58 PM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,025
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Not Ranked
Quote:
Originally Posted by zimmy
What does this mean? As long as the oil pressure is up and correct, why would a colder engine "wear out"? Actually you'll get better performance from a cooler engine. |
You're not going to wear your engine out, but I do bet that your gauge is wrong. Get one of the little infrared pyrometers at Lowes or Home Depot or the like (they're also handy for checking temperatures across your tires). Then you just point and click at different spots on your cooling system to see what the temperatures are -- that will give you an indication as to whether your gauge is really off or not.
Clever Afterthought -- If you really were wearing your engine out, then the increased friction would create more heat, thus stopping the wear out process by getting your temperatures up where they belong.
Last edited by patrickt; 04-06-2009 at 01:01 PM..
Reason: A really clever afterthought.
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04-06-2009, 01:02 PM
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Canadian Gashole
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Join Date: Mar 1999
Location: Quebec, Canada,
QC
Cobra Make, Engine: Johnex 427 S/C, 351W, 472 HP, 444 lbs. torque
Posts: 2,455
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Not Ranked
Quote:
Originally Posted by zimmy
What does this mean? As long as the oil pressure is up and correct, why would a colder engine "wear out"? Actually you'll get better performance from a cooler engine. |
The engine is designed and probably built to run at 180 to 190 degrees. Operating it for an extended period of time at a temp well below 180 means that the tolerances are not correct. For example the pistons are aluminum and the cylinders are steel. The 2 expand at different rates with the change in temperature but are machined to operate at 180 not 140 degrees.
As a rule of thumb, your engine sustains more wear in the first 5 minutes of operation than it does in xxx miles (sorry, I can't remember the number of miles).
Wayne
__________________
Don't get caught dead, sitting on your seat belt.
Last edited by Wayne Maybury; 04-06-2009 at 01:04 PM..
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04-06-2009, 01:04 PM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,025
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Not Ranked
Just Remember...
... that 99% of the owners around here either die or sell their Cobra before they put 20,000 miles on it.  |
04-06-2009, 01:44 PM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
The direct temperature may not wear it out, but driving it at that temperature doesn't give the engine a chance to get hot enough to get all of the condensation out of the oil. |
04-06-2009, 01:45 PM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,025
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Not Ranked
Quote:
Originally Posted by blykins
The direct temperature may not wear it out, but driving it at that temperature doesn't give the engine a chance to get hot enough to get all of the condensation out of the oil. |
Just put some cat litter in the oil --- it'll dry it right out. |
04-06-2009, 01:49 PM
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CC Member
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Join Date: Jan 2009
Location: Las Vegas,
NV
Cobra Make, Engine: Shelby CSX4005LA, Roush 427IR
Posts: 5,629
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Not Ranked
Quote:
Originally Posted by Wayne Maybury
The engine is designed and probably built to run at 180 to 190 degrees. Operating it for an extended period of time at a temp well below 180 means that the tolerances are not correct. For example the pistons are aluminum and the cylinders are steel. The 2 expand at different rates with the change in temperature but are machined to operate at 180 not 140 degrees.
As a rule of thumb, your engine sustains more wear in the first 5 minutes of operation than it does in xxx miles (sorry, I can't remember the number of miles).
Wayne
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I had to replace my thermostat and the closest engine catalog listed a 195. Mine was 180. Any advantage or disadvantage in going higher? |
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