93' Miata stolen and flipped build thread
#3428
Before I get this done I figured I'd ask real quick. Do you foresee an issue with welding a 1/8NPT bung into the wall of the Mocal sandwich plate as an oil temp sensor source?
I hear the oil temp is slightly higher here rather than the pan, but considering the pan is on the engine, and in the car, it is rather hard to do it correctly(weld) rather than tapping & JB welding and hoping for no further issues down the road.
Seeing as the plate isn't installed yet, and the Setrab is f'n huge, a slightly higher oil temp reading doesn't warrant a danger flag to me.
I hear the oil temp is slightly higher here rather than the pan, but considering the pan is on the engine, and in the car, it is rather hard to do it correctly(weld) rather than tapping & JB welding and hoping for no further issues down the road.
Seeing as the plate isn't installed yet, and the Setrab is f'n huge, a slightly higher oil temp reading doesn't warrant a danger flag to me.
#3434
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Another option to consider is depending on your oil temp gauge you can get a sensor that replaces the oil drain plug. Which would give you better temperature anyways.
#3435
What about something like this? Ran across it the other day doing research.
Sensing your temperature at the sandwich plate tells you the temperature of the oil being actively sucked-up and used by the engine. Sensing at the oil pan/oil drain plug is a convenient, "good-enough" substitute but will read cold. The "better" reading is at the sandwich plate, but either will do.
#3436
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Sensing your temperature at the sandwich plate tells you the temperature of the oil being actively sucked-up and used by the engine. Sensing at the oil pan/oil drain plug is a convenient, "good-enough" substitute but will read cold. The "better" reading is at the sandwich plate, but either will do.
#3437
Drill, tap, screw in with thread sealant and move on. There's a lot of meat on that sandwich adapter. If you do decide to weld it, make sure to remove the rubber O-ring and thermostat with wax element. Otherwise they could get damaged.
Sensing your temperature at the sandwich plate tells you the temperature of the oil being actively sucked-up and used by the engine. Sensing at the oil pan/oil drain plug is a convenient, "good-enough" substitute but will read cold. The "better" reading is at the sandwich plate, but either will do.
Sensing your temperature at the sandwich plate tells you the temperature of the oil being actively sucked-up and used by the engine. Sensing at the oil pan/oil drain plug is a convenient, "good-enough" substitute but will read cold. The "better" reading is at the sandwich plate, but either will do.
#3438
Think about it. I know you'll come to the correct conclusion.
Hint #1 . . . our oil pans have fins for a reason.
Hint #2 . . . liquids like oil and water don't follow the ideal gas law -- they're considered "incompressible."
Hint #3 . . . even if the oil pump raised the temperature 1000F, that's still the temp going into your cooler/engine -- so wouldn't you like to know what it is?
That said, generally the difference will be on the order of 15F under light running and 30F under track conditions, so the oil pan is "good enough." Beyond absolute numbers, the main thing you want to catch on track is a bad trend (i.e., oil suddenly getting hotter for no apparent reason -- time to slow down and investigate).
#3440
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Where I got my incorrect oil-compression info, and also where it was correctly fixed.
https://www.miataturbo.net/engine-pe...acement-66980/
https://www.miataturbo.net/engine-pe...acement-66980/