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C6 Corvette ZR1 & Z06General info about GM’s Corvette Supercar, LS9 Corvette Technical Info, Performance Upgrades, Suspension Setup for Street or Track
So I deleted my oil cooler on my car when I swapped out my motor. I have 300 miles on the new motor and have been watching the oil temps closely. What I have found is that they get to 160* very quickly, within 10 minutes of driving. My issue is temperature recovery, normal cruising and ambient temps at 94-100* showed me 215-220* and a few pulls show 230-235*. The current setup is a DeWitts radiator without the EOC and a GM block off plate for the cooler lines with VR1 conventional 20w50 (recommended for break-in from builder). Are these temperatures okay/desirable? Once they get to temp they'll stay there around 218-222*. I have the stock oil cooler with new lines waiting to install or was going to buy the EOC radiator and sell mine. Thanks for any input on temps/recovery
What oil are you running? I believe those temps are fine; I removed my cooler simply because I couldn't get my temps over 170-180ish, maybe in the low 190's with a WOT pull, but they would quickly drop back down. Now I'll see 205-210 cruising and it'll spike up to 220 with a pull. Haven't seen over 220 yet. I drove it last night in Dover, lot of stop and go traffic, 91-degrees on the display. Temps hovered between 214-218. I believe you need to see over 212 or thereabouts to burn off condensation in the oil.
Those temps are about right. I have the Dewitts with the EOC and the Z51 lines and with that set up the oil and water temps are very much aligned. I noticed when I did the block off that my oil temps were higher than without the EOC by I think like 15 degrees or so but the oil pressure was a little higher assuming equal oil temps without the EOC.
Probably not an issue, since you don't stay at 235F for a long time. But the oil is detoriating at a higher rate at this temperature. I use the oil cooler thermostat from Improved Racing (I have the version that starts to open at 212F, but would probably buy the 200F version if I did it again), and it works very well. It probably heats up a bit slower than your car, since around 5% of the oil will pass through the oil cooler even at a closed state. But it heats up way faster and to a higher temperature than it did before the upgrade.
If you decided to use Radiator EOC, I am interested in your stock EOC for my '08 base Vert.
235°F is about where my oil runs on a warm day, steady cruise @ 80MPH, this is w/o an EOC. Let me know.
Probably not an issue, since you don't stay at 235F for a long time. But the oil is detoriating at a higher rate at this temperature. I use the oil cooler thermostat from Improved Racing (I have the version that starts to open at 212F, but would probably buy the 200F version if I did it again), and it works very well. It probably heats up a bit slower than your car, since around 5% of the oil will pass through the oil cooler even at a closed state. But it heats up way faster and to a higher temperature than it did before the upgrade.
How did you route the lines to the stock EOC? What temps do you see and what ambient temperature? Thank you
Originally Posted by double06
Those temps are about right. I have the Dewitts with the EOC and the Z51 lines and with that set up the oil and water temps are very much aligned. I noticed when I did the block off that my oil temps were higher than without the EOC by I think like 15 degrees or so but the oil pressure was a little higher assuming equal oil temps without the EOC.
So you see 190-195* oil temps and coolant? My DeWitt unit keeps my coolant under 205* unless I'm sitting in traffic or at a drive-thru
Thanks for the input, it's just so freaking hot in Florida I am just concerned as my last Z06 never got over 200* with the stock a2a eoc. My oil is VR1 conventional 20w50 since I have a looser motor than stock my builder said this oil would work well for break in/long term use
Your temps are good man. Keep in mind, your sensor is in the oil tank itself, so your temp in the engine is probably 20-30 degree hotter. Personally, your temps are ideal for street conditions. I also run the Improved Oil thermostat (212* version) and my DIC never displays temps above 180* (even in 100*+ NC weather). So I'm assuming that my engine oil temps in the motor are right at 212-215. I do wish they'd run a bit hotter (around 240), but it's nice to know that when I blast on it, the oil can cool if/when needed.
Last edited by Pb82 Ronin; 06-26-2019 at 10:14 AM.
Warm day and 3000 rpm for 30 miles, what does the temps on your set up go to? That is when I noticed a change from 2000 rpm cruise. For me a short wot pull didn't change much. Our gearing really helps keep temps down. The road course guys really put some heat in their oil. Just depends on how you use it. I like to see around 200-220.
Last edited by itsonlyairandfuel; 06-26-2019 at 10:52 AM.
Warm day and 3000 rpm for 30 miles, what does the temps on your set up go to? That is when I noticed a change from 2000 rpm cruise. For me a short wot pull didn't change much. Our gearing really helps keep temps down. The road course guys really put some heat in their oil. Just depends on how you use it. I like to see around 200-220.
On the track when I'm pushing hard, I see 260 to 270 all the time.
How did you route the lines to the stock EOC? What temps do you see and what ambient temperature? Thank you
I don’t remember my water temps, but the oil temp stabilizes at 210-214F with some active driving. Haven’t driven the car on the racetrack yet, but the thing is that the thermostat starts to open at 212F and is fully open a bit later. I thought before I bought it that it was fully open at 212F. At the track it doesn’t matter, as the thermostat will be fully open and temps higher anyway. Ambient temp here is around 65-75F (Norway)
The hoses are routed exactly where the OEM hoses go. I bought the kit from Improved. Exceptionally high quality parts.
I don’t remember my water temps, but the oil temp stabilizes at 210-214F with some active driving. Haven’t driven the car on the racetrack yet, but the thing is that the thermostat starts to open at 212F and is fully open a bit later. I thought before I bought it that it was fully open at 212F. At the track it doesn’t matter, as the thermostat will be fully open and temps higher anyway. Ambient temp here is around 65-75F (Norway)
The hoses are routed exactly where the OEM hoses go. I bought the kit from Improved. Exceptionally high quality parts.
Those temps sound good for sure. You're running the stock A2A oil cooler with the lines and thermostat from Improved right? Thanks for the clarification
I would have recommended the Dewitts w/ EOC, but since you already have a Dewitts (sans EOC), I don't think you need to go through the trouble of swapping it out. I'd just do the Improved T-stat & lines, along with your OE cooler and call it a day. http://www.improvedracing.com/oil-co...610-p-767.html
Those temps sound good for sure. You're running the stock A2A oil cooler with the lines and thermostat from Improved right? Thanks for the clarification
Yes, stock cooler. I think the setup I’m running is ideal for track use (but maybe with a bigger oil cooler), and the setup MTPZ06 is talking about with water to to first heat the oil and then cool the oil is optimal for street use, as you would get good temps very quick (how quick to 200F, MTP?).
Yes, stock cooler. I think the setup I’m running is ideal for track use (but maybe with a bigger oil cooler), and the setup MTPZ06 is talking about with water to to first heat the oil and then cool the oil is optimal for street use, as you would get good temps very quick (how quick to 200F, MTP?).
I actually took a different route altogether and I added an OE ZR1 radiator and the ZR1 oil cooler/heat exchanger to my '09 C6Z which also came on all 2011+ C6Z's from the factory. I'm in the 190-200 range withing ~5 min of driving, and it stays right around that 200 degree mark pretty consistently during normal driving..
I need to put some heat tape over my oil cooler. Takes 25 freakin minutes to get to 150F and rarely gets over 185F
I tried this prior to removing the cooler altogether; negligible difference in my case. Didn't warm up any faster, and increased the temps somewhat, but still nowhere near what I see now. I'm not trying to justify my decision to remove my cooler, just passing on my specific experience with trying to increase my oil temps. Of note; I see great temps now, but it still takes 10+ minutes to get to 150 and higher, which is agonizingly slow when all you want to do is let the LS7 rip!
Sounds like the option mentioned by MTPZ06 is a winner.
I tried this prior to removing the cooler altogether; negligible difference in my case. Didn't warm up any faster, and increased the temps somewhat, but still nowhere near what I see now. I'm not trying to justify my decision to remove my cooler, just passing on my specific experience with trying to increase my oil temps. Of note; I see great temps now, but it still takes 10+ minutes to get to 150 and higher, which is agonizingly slow when all you want to do is let the LS7 rip!
Sounds like the option mentioned by MTPZ06 is a winner.
Probably not an issue, since you don't stay at 235F for a long time. But the oil is detoriating at a higher rate at this temperature. I use the oil cooler thermostat from Improved Racing (I have the version that starts to open at 212F, but would probably buy the 200F version if I did it again), and it works very well. It probably heats up a bit slower than your car, since around 5% of the oil will pass through the oil cooler even at a closed state. But it heats up way faster and to a higher temperature than it did before the upgrade.
I have the improved racing setup and I second this. It works very well.
Oil temp on the DIC is usually 5-10 degrees cooler that coolant temp. Considering where that oil temp sender is, both those fluids are probably the same temp most of the time.
i used the z51 oil cooler bolts up to stock mount and is 1/2 size of the z06 cooler.
brings my oil temp up and still provides some cooling. meets my needs for this cars street / strip / weekend warrior road course
06-26-2019, 12:50 AM
Oil cooler delete / temp recovery advice
