Oil temperature

[jaguarking11]

For one oil temp and pressure go hand in hand. If your monitoring the temp with a real gauge, then go ahead and install a pressure gauge too. Take it out for a spin and see what the pressure is at normal operating temp. I would not be surprised to see the engine under normal driving be in the 200-220f range. As for pressure, i'm not sure what a coyote runs normally. But find out and keep an eye on it, +-20% of normal cycle is what you should be seeing at the track.

As for the boss cooler, I actually don't like it very much. A air cooled core and a filter adapter would be my choice, and you get the advantage to add a quart of capacity. I would also run at least 5-30 at the track, maybe even in the 10w-50 to 10w-60range if your going to be out there for a while. The 5w-50 should accommodate around 300F -350F without loosing a significant amount of pressure.

 

[JAJ]

Right, yeah, I misspoke. Like I said, I'm lazy... didn't want to drain the coolant. I thought it had to be refilled via vacuum, so i thought I might not have the tools needed, but that isn't the case either...

I hear you! I work very slowly as well.

As for filling the cooling system, I got an Airlift cooling system filler from Amazon for $130 or so, and it works like a charm. It takes a little bit of compressed air, but not much. I have a small 8 gallon compressor for filling tires and it works fine.

 

[DUFUS]

I've seen 280 degF on track so far, and my engine is completely stock.

For track use, anything under 280 degF is fine. If it gets up to 300 degF, keep a close eye on it. If it gets over 320 degF, pull in. When do you that, don't go into high gear right away because your oil pressure will be extremely low. Keep your engine speed somewhat high, but only give the engine ~50% load. Once your oil temperature drops back down to an acceptable level, then you can decrease speed. You also don't want to completely let off the throttle at high speed because your connecting rod stress will be very high, and you could scrape the rod bearings on the crankpins if your oil pressure is already low from the hot oil.

Also, even if you're not exceeding 280 degF, let your engine idle in the paddock for a while before shutting it off. Chances are the oil will be extremely hot even after the cool-down lap. Letting it idle and drop to ~220 degF will minimize oil coking.

To complete the circle as OP, the highest oil temp I saw over the weekend (HPDE at Road America) was 270. That was when I was really pushing it. More "typical" range was 250-ish. I forgot about idling in the paddock for awhile after a run. D'oh. I used 5W20 Mobil 1.
Being the idiot I am, I couldn't for the life of me get into the engineering/diag mode to be able to see an actual coolant temp reading. The gauge never went above half, but I don't know whether it's a "real" gauge or a glorified dummy light like the oil pressure gauge. It does start all the way to the left when the engine is cold, but always seems to rise at the same rate and just stay in the middle.

 

[Sleeper_08]

To complete the circle as OP, the highest oil temp I saw over the weekend (HPDE at Road America) was 270. That was when I was really pushing it. More "typical" range was 250-ish. I forgot about idling in the paddock for awhile after a run. D'oh. I used 5W20 Mobil 1.
Being the idiot I am, I couldn't for the life of me get into the engineering/diag mode to be able to see an actual coolant temp reading. The gauge never went above half, but I don't know whether it's a "real" gauge or a glorified dummy light like the oil pressure gauge. It does start all the way to the left when the engine is cold, but always seems to rise at the same rate and just stay in the middle.

The coolant temp gauge is a glorified idiot light. It sits at the middle unless things get really hot then starts moving to the right. I brought it back under control on my last track day by putting the heater on high and full fan. Thank goodness for my Cool Shirt.

 

[DUFUS]

The coolant temp gauge is a glorified idiot light. It sits at the middle unless things get really hot then starts moving to the right. I brought it back under control on my last track day by putting the heater on high and full fan. Thank goodness for my Cool Shirt.

I ran the heater as well. For that reason, and because it was freaking cold out. So it was welcome. I'll have to continue to monitor closely on warm(er) track days.

 

[ddd4114]

Yeah, I've only hit 280 when I can stay clear of traffic for a few laps. It takes a while to heat all 8 quarts up that hot and keep them there.

I'll have to look through my logs, but I think the highest coolant temperature I've seen is ~220 degF according to the obd2 data. I think the fan comes on at ~205 degF, but I'll have to double check that too.

On a track, since the car is moving so fast, keeping the coolant temperature in check shouldn't be an issue unless you've heavily modified the engine (supercharger or whatnot). If you follow people closely a lot, that might also cause problems because you're killing airflow through the radiator.