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Old 08-07-2018, 04:41 PM   #1
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Default Oil temp?

What’s the normal oil temperature for the average b230 being run very hard?
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Old 08-08-2018, 10:15 AM   #2
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Do enough of us have accurate and working gauges to give this info on here
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Old 08-08-2018, 10:23 AM   #3
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Some of us do...

Depends on what kind of cooler setup and airflow you have. Mine right now with the RX7 cooler, 75C cooler stat from a B21FT, middle of summer in traffic will hit around 210-220F. With the cooler in nearly the same location, different belly pan, it would hit 270F.

The factory oil cooler t-stat is a 95C stat, so that should give you a starting point at least.
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Old 08-08-2018, 11:09 AM   #4
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82 B21FT, i don't see over 180º F.
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Old 08-08-2018, 11:11 AM   #5
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82 B21FT, i don't see over 180º F.
This
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Old 08-08-2018, 11:37 AM   #6
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Coolant cooler.
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Old 08-08-2018, 12:20 PM   #7
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82 B21FT, i don't see over 1psi of boost.

ftfy
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Old 08-08-2018, 12:27 PM   #8
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Lol.
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Old 08-08-2018, 01:01 PM   #9
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I've been seeing 110 C lately after getting on it. Last year (with less boost) I was always around 100 C. This is with the stock turbo oil cooler and lines.
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Old 08-08-2018, 01:11 PM   #10
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I saw a max around ~230 F after ten minutes of autocross (read: absolute flogging it in second gear). If I drive it hard on the street when it's 93 F ambient like it has been lately I'll touch 210 F but it drops fast. Stock heat exchanger front-mounted with -10 lines.
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Old 08-08-2018, 01:12 PM   #11
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I saw a max around ~230 F after ten minutes of autocross (read: absolute flogging it in second gear). If I drive it hard on the street when it's 93 F ambient like it has been lately I'll touch 210 F but it drops fast. Stock heat exchanger front-mounted with -10 lines.
Looks like I need to do something about my oil cooler.
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Old 08-08-2018, 01:21 PM   #12
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Looks like I need to do something about my oil cooler.
Think I mentioned to you earlier in the year the next thing I want to play with is some sheetmetal and a brake to make ducting for the front of the car. I think my water temps creep up too quickly. I've got to really run it to build up the oil temps though.
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Old 08-08-2018, 01:36 PM   #13
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Ducting makes a HUGE difference. I played with a ton of options, finally found having a solid bellypan from the airdam to the crossmember resolved a lot of my oil cooling issues (RX7 cooler is mounted right behind the airdam opening).

One other thing I noted as well was a modification to the grille. I added an insert into the airdam opening, a section of grille I snagged from an S40. Purely for aesthetics, but it also helped oil temps. The top part of the slats is about 3/4" wide, the bottom is only 1/4", so it causes some turbulence, pulls air in better. I tried the same concept on the eggcrate, saw the e-fan runs less on the freeway.
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Old 08-08-2018, 01:39 PM   #14
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Quote:
Originally Posted by gsellstr View Post
Ducting makes a HUGE difference. I played with a ton of options, finally found having a solid bellypan from the airdam to the crossmember resolved a lot of my oil cooling issues (RX7 cooler is mounted right behind the airdam opening).

One other thing I noted as well was a modification to the grille. I added an insert into the airdam opening, a section of grille I snagged from an S40. Purely for aesthetics, but it also helped oil temps. The top part of the slats is about 3/4" wide, the bottom is only 1/4", so it causes some turbulence, pulls air in better. I tried the same concept on the eggcrate, saw the e-fan runs less on the freeway.
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Old 08-08-2018, 01:59 PM   #15
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Are you guys all running drain plug temp senders? I want to see what my oil temp does and I'm not sure where to locate the sender. Pan, before cooler, after cooler, etc?
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Old 08-08-2018, 02:05 PM   #16
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Quote:
Originally Posted by Stiggy Pop View Post
Think I mentioned to you earlier in the year the next thing I want to play with is some sheetmetal and a brake to make ducting for the front of the car. I think my water temps creep up too quickly. I've got to really run it to build up the oil temps though.
Well when do you it, just go ahead and make two .

What oil do you use? That will likely cause some differences. I'm only using cheapo conventional oil for break in, which apparently has a lower heat capacity than synthetic. That might explain my higher temps.

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Are you guys all running drain plug temp senders? I want to see what my oil temp does and I'm not sure where to locate the sender. Pan, before cooler, after cooler, etc?
Mine is in a fitting I welded to the side of the pan.
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Old 08-08-2018, 02:06 PM   #17
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My Lemons car [94 b230ft, aftermarket sandwich plate that I think is a 90 c tstat] has always ran 105-115 after a few hard laps and will stay there for well over an hour. Have about 3k race miles on it

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Are you guys all running drain plug temp senders? I want to see what my oil temp does and I'm not sure where to locate the sender. Pan, before cooler, after cooler, etc?
I am probing it in the factory oil feed hole on the side of the block
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Old 08-08-2018, 02:10 PM   #18
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Originally Posted by pat244ti View Post
My Lemons car [94 b230ft, aftermarket sandwich plate that I think is a 90 c tstat] has always ran 105-115 after a few hard laps and will stay there for well over an hour. Have about 3k race miles on it



I am probing it in the factory oil feed hole on the side of the block
Do you think exhaust manifold temp is affecting the sender there?
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Old 08-08-2018, 02:17 PM   #19
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Do you think exhaust manifold temp is affecting the sender there?
The first event [which I barely had the car finished for in time with an R sport cluster] I ran it bare and exposed. Worked the whole weekend but the wire got cooked.

I swapped to a different gauge and installed a different sender, and that time I wrapped it in this stuff and routed it close to the block.



No problems yet. I like not having it at the bottom of the pan, especially on a low car. Gave the rally car the same treatment despite not being low

Crazy Taxi has the probe at the bottom of the pan, both races it has lost the wire. Last race I think someone got curb happy becuase the prong on the sender got smashed off.

Last edited by pat244ti; 08-08-2018 at 02:33 PM..
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Old 08-08-2018, 02:28 PM   #20
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Drain plug sender here as well, but I have a skid plate that helps protect it.

Just so happens I have a pic of the grille...

Last edited by gsellstr; 08-08-2018 at 02:36 PM..
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Old 08-09-2018, 10:42 PM   #21
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I put a separate bung in the oil pan for the sender, [stock 1990 245]. Normal temps @ 70 C. Drove up a STEEP mountain road in the Catskill's, [4 miles up,only open part of the year,barely more than a lane wide, had to use 2nd and 1st gear. ] Saw the oil temp go to 100C, cooled off soon after the top. So driving hard will raise the temp, but if you are getting high temps,and can't cool down the oil,this is not good . The race car that I built and was the crew chief for ran 40+ F over the water temp. We would tape up the oil cooler some times to get the oil hot enough,if it was too cold out, we used a big oil cooler. So 100C = 212 F, We would shoot for 235 F.
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Old 08-10-2018, 04:55 PM   #22
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100 F Degree ambient temps, AC, Freeway cruising, 80* C and when I'm smashing it I see 100* C
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