I'd be tempted to disbelieve an oil temp gauge that ignored the installation of a Kendall's super mega oil cooler with t-stat. I got a lesson in what-to-check first from Bobby and Al Unser when I stopped at their shop in Albuquerque, September, 1957. My MGTD had some work done in Los Angeles, and I was advised to change the oil after about 500 miles. On my way to Little Rock, AR, I stopped in Kingman, AZ, and changed the oil to the recommended 30-weight Castrol. The oil pressure practically doubled, so it seemed natural to stop at the Unsers'. They were just rolling the doors closed at noon on a Saturday, but didn't refuse me. First thing they did was disconnect the standard (mechanical) gauge and substitute a new Jaguar instrument. It registered the same, and they declared "No problemo", which it turned out was true. We decided since the L.A. work involved pistons and rings, the oil removed in Kingman was "break-in" viscosity, which explained the new readings.
Couple of years ago I asked Bobby if he remembered the incident. He said they had so many of those furrin cars needing repair on their way from L.A. to anywhere east, that my little chapter must not have registered.
so oil temp and water temp our both predicted?? I have a '14 track pack with boss oil/coolant cooler. car oil temp goes into red within 5 laps on a 68 deg day. water temps slightly past halfway. since that track day I installed Kendall's super mega oil cooler with t-stat. took car took track this past friday and got about 8 laps before pegging the gauge. water temp still fine. ww/coolant/water 1 bottle/30%/70%. I am seriously ready to sell this car. please any help would be great. I read through most of this thread but in kinda went off topic. p.s. first overheating oil issues car kinda went into a limp/power take away mode. I am guessing to protect itself. This past Friday I purposely drove two extra laps in the red to see if it would take away power and it did not. I love everything about this car but it is useless if I can't track it........possible well set up gt for sale lol.....thanks AJ
I have always had my OEM temp gauge read a tad to the left of the middle of the gauge. I have no idea what temp that is. I know I need to get a gauge. So I start searching and it turns out that at least the 3v engines do not have a coolant sensor. They use a cylinder head temp. I feel I'm REAL late to this info. All this time I thought I had a rock steady gauge reading to find out it's not even the coolant that is measured. It is always a smidge to the left of center even during a 25 minutes track session too. That is with a blower and the only cooling other than an upgraded intercooler is the functional cowl hood.
The 05-10 3v engs read cyl head temp (cht) via 1 sensor..(I think located at either cyl #4 or #8). The "coolant temp" is derived via an algorithm, so is not a real reading. The high /low fan thresholds however, trip off the "coolant temp".
Um, no, wrong.... Again. You REALLY need to research your shit before posting it as gospel, guy. The ENTIRE dash, excepting the fuel level readings, are PCM driven to stepper motors. There are no regulated feeds running through resistors, the info is shot to the dash through both high-speed and medium-speed CAN BUS data links. And yes, there IS an oil pressure transducer that feeds analog data to the PCM. How do I know this? My car is a hybrid of 2006 and 2008 parts and systems, and to complete my build, I needed wiring manuals from both years... That also fairly neatly covers both the "early" and "late" 4.6L S197 designs... So, it was simple to look up the schematics for the systems you mentioned and verify, that yes, once again, you have your head up your ass. It would be amusing, except that far too many people take what they read here as gospel truth, but you're preaching out of the wrong book.The mech oil pressure gauge on the dash of the 05-10 cars is bogus, it stays fixed at all times. They have just looped regulated 12-14 vdc through a resistor to derive a midscale reading on an analog gauge. The boost gauge on the 07+ GT-500 cars apparently is not real, but derived.
so oil temp and water temp our both predicted?? I have a '14 track pack with boss oil/coolant cooler. car oil temp goes into red within 5 laps on a 68 deg day. water temps slightly past halfway. since that track day I installed Kendall's super mega oil cooler with t-stat. took car took track this past friday and got about 8 laps before pegging the gauge. water temp still fine. ww/coolant/water 1 bottle/30%/70%. I am seriously ready to sell this car. please any help would be great. I read through most of this thread but in kinda went off topic. p.s. first overheating oil issues car kinda went into a limp/power take away mode. I am guessing to protect itself. This past Friday I purposely drove two extra laps in the red to see if it would take away power and it did not. I love everything about this car but it is useless if I can't track it........possible well set up gt for sale lol.....thanks AJ
I hope you don't mind. Every so often some debris from the past shows up unexpectedly, like a frog in my throat, and I have to clear it out.Are you trying to one-up me at story-time Frank?
motorcraft 5-50 syn (factory recommended) changed at 1400 miles when cooler was installed. I have about 2000 miles on it now. engine all stock no tune.....just mbrp x-pipe back exhaust.
Um, no, wrong.... Again. You REALLY need to research your shit before posting it as gospel, guy. The ENTIRE dash, excepting the fuel level readings, are PCM driven to stepper motors. There are no regulated feeds running through resistors, the info is shot to the dash through both high-speed and medium-speed CAN BUS data links. And yes, there IS an oil pressure transducer that feeds analog data to the PCM. How do I know this? My car is a hybrid of 2006 and 2008 parts and systems, and to complete my build, I needed wiring manuals from both years... That also fairly neatly covers both the "early" and "late" 4.6L S197 designs... So, it was simple to look up the schematics for the systems you mentioned and verify, that yes, once again, you have your head up your ass. It would be amusing, except that far too many people take what they read here as gospel truth, but you're preaching out of the wrong book.
Before anybody says anything, yes, your conclusion (distilled down to "run some real direct-reading gauges") is correct. The "evidence" you use to support your conclusion, however, is as usual highly suspect or completely erroneous. FWIW, I run analog direct-reading Oil Pressure, Oil Temp, and Coolant temp gauges in my car, and strongly recommend the same to anybody doing serious tracking.
. And yes, there IS an oil pressure transducer that feeds analog data to the PCM. How do I know this? My car is a hybrid of 2006 and 2008 parts and systems, and to complete my build, I needed wiring manuals from both years... That also fairly neatly covers both the "early" and "late" 4.6L S197 designs... So, it was simple to look up the schematics for the systems you mentioned and verify, that yes, once again, you have your head up your ass.
Get a high-flow grille like the 302S, Roush, or Saleen for tracking. Or, pull your grille altogether.
I don't have cooling issues out here in Arizona at the track, setup is a B302 with Setrab 925 oil cooler in-line with factory oil cooler setup and stock radiator. 302S grille most of the time but Roush style grille for the hottest parts of the year. Straight water plus two bottles of water wetter in the coolant system.
something has to be wrong with my car.....I run watkins glen pitt race and nelsons ledges. my temp goes red in five laps. The temp is only 70 deg,, help me fix this I will pay you....![]()