Oil cooler tech
#501
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I have a similar setup on my NA vvt '93. Keeps oil temps to around 220 or less on track in ~98+ ambient Texas weather. I'm thinking a nice, small electric fan will really help improve efficiency since it's seeing air after the radiator. That is my next plan, and I'll wire it on a switch so I can compare on the same day.
#502
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I have a similar setup on my NA vvt '93. Keeps oil temps to around 220 or less on track in ~98+ ambient Texas weather. I'm thinking a nice, small electric fan will really help improve efficiency since it's seeing air after the radiator. That is my next plan, and I'll wire it on a switch so I can compare on the same day.
#503
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I have a similar setup on my NA vvt '93. Keeps oil temps to around 220 or less on track in ~98+ ambient Texas weather. I'm thinking a nice, small electric fan will really help improve efficiency since it's seeing air after the radiator. That is my next plan, and I'll wire it on a switch so I can compare on the same day.
![](https://cimg2.ibsrv.net/gimg/www.miataturbo.net-vbulletin/2000x1504/32999fe6_7d88_4864_9465_845afc5da2c3_76b73c17113f7f2bf045a61aab128cb71f133fa6.jpeg)
#504
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Wow amazing job!
I have been using FM Oil Cooler kit for sometime now. But over the weekend it was one of the hotter days and the oil temp gets too high after 5 or so hot laps, so I guess I need to do something about the ducting work or fit one like yours. Would you sell your 3d printed duct and brackets?
I have been using FM Oil Cooler kit for sometime now. But over the weekend it was one of the hotter days and the oil temp gets too high after 5 or so hot laps, so I guess I need to do something about the ducting work or fit one like yours. Would you sell your 3d printed duct and brackets?
There are a few ducting options in the market, too lazy to look for you more than 1 but there are cheaper ones too
https://www.demon-tweeks.com/us/revo...ct-kit-343114/
#509
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![](https://cimg3.ibsrv.net/gimg/www.miataturbo.net-vbulletin/2000x1504/img_20200609_220706_df083dfee43be232b04ccbe91c115fd9ab7141b8.jpg)
Has anyone mounted his oil cooler laid flat in the mouth? I currently run a 25 row cooler behind the 50 mm aluminium water cooler, fully ducted to the radiator. The intercooler is located 25 mm before the radiator and covers the lower half of the radiator. Everything is fully sealed to the mouth opening.
On track I see water temps of 90-93° C and regular oil temps of 100° C, taken at the oil drain in the pan. However at the Ring I see brief moments of almost 130° C when 320 whp are running free for 30" on an uphill straight. So I wonder if I could improve my cooling.
My idea was to switch to a smaller 19 row cooler, but mount it horizontally before the intercooler. So it wouldn't be a V setup but rather an L setup. It would be attached to a Dibond plate, again fully sealed so air needs to pass through the oil cooler and then exit into the gap between my splitter-ish underbody panel and the radiator ducting l, and from there exit the engine bay together with all the other hot air from engine bay
I don't want to dump the air into the fast air underneath the splitter
#510
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s anyone mounted his oil cooler laid flat in the mouth? I currently run a 25 row cooler behind the 50 mm aluminium water cooler, fully ducted to the radiator. The intercooler is located 25 mm before the radiator and covers the lower half of the radiator. Everything is fully sealed to the mouth opening.
On track I see water temps of 90-93° C and regular oil temps of 100° C, taken at the oil drain in the pan. However at the Ring I see brief moments of almost 130° C when 320 whp are running free for 30" on an uphill straight. So I wonder if I could improve my cooling.
My idea was to switch to a smaller 19 row cooler, but mount it horizontally before the intercooler. So it wouldn't be a V setup but rather an L setup. It would be attached to a Dibond plate, again fully sealed so air needs to pass through the oil cooler and then exit into the gap between my splitter-ish underbody panel and the radiator ducting l, and from there exit the engine bay together with all the other hot air from engine bay
I don't want to dump the air into the fast air underneath the splitter
On track I see water temps of 90-93° C and regular oil temps of 100° C, taken at the oil drain in the pan. However at the Ring I see brief moments of almost 130° C when 320 whp are running free for 30" on an uphill straight. So I wonder if I could improve my cooling.
My idea was to switch to a smaller 19 row cooler, but mount it horizontally before the intercooler. So it wouldn't be a V setup but rather an L setup. It would be attached to a Dibond plate, again fully sealed so air needs to pass through the oil cooler and then exit into the gap between my splitter-ish underbody panel and the radiator ducting l, and from there exit the engine bay together with all the other hot air from engine bay
I don't want to dump the air into the fast air underneath the splitter
#511
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#514
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If the thermostat is set to open at 205° you'll find your actual temps are a bit higher in practice. Here's an image I snipped off the web:
![](https://cimg5.ibsrv.net/gimg/www.miataturbo.net-vbulletin/739x221/ir_oil_thermostat_0fd7e201650222ebe191764fe03d67f7ec0c08c4.jpg)
This is for the Improved Racing oil thermostat ( High-Flow Engine Oil Cooler Thermostat FSM ) to give you an idea of what I'm talking about. This behavior is common in all wax pill/motor thermally regulated systems.
#515
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Has anyone mounted his oil cooler laid flat in the mouth?
My idea was to switch to a smaller 19 row cooler, but mount it horizontally before the intercooler. So it wouldn't be a V setup but rather an L setup. It would be attached to a Dibond plate, again fully sealed so air needs to pass through the oil cooler and then exit into the gap between my splitter-ish underbody panel and the radiator ducting l, and from there exit the engine bay together with all the other hot air from engine bay
My idea was to switch to a smaller 19 row cooler, but mount it horizontally before the intercooler. So it wouldn't be a V setup but rather an L setup. It would be attached to a Dibond plate, again fully sealed so air needs to pass through the oil cooler and then exit into the gap between my splitter-ish underbody panel and the radiator ducting l, and from there exit the engine bay together with all the other hot air from engine bay
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#517
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I had noticed that my oil temps weren't as good as I'd expected, so thought I would put a temperature sensor right behind the radiator to see what temperature of air, the oil cooler is actually getting.
See the plot of a 15 minute session below, admittedly this session wasn't as fast as the car could go, but still ~10 seconds/lap under the UK spec miata pace, at 170kpa = 265hp and 1160kg total.
![](https://cimg2.ibsrv.net/gimg/www.miataturbo.net-vbulletin/1501x709/coolant_temps_82f3cb95ed5e8c4a18b91fe3f06e3fd2766856a4.png)
The air temps out of the rad were around ambient +30C. My ambient temp sensor appears to heat soak a little on track (and definitely in the pits!). Ambient according to the weather report at the time was 14C.
Still, oil temps of almost ambient +100C is a lot, more than I'd like. The data suggests this setrab would be capable of ambient +70C given ambient air, which would be more than enough for me. Or put another way, taking air from behind the rad, needs an oil cooler sized 40-50% larger, assuming the airflow is the same (big assumption!)
I'm tempted to move my oil cooler, which would allow a second radiator fan to shed heat faster when a session get's red flagged I can't do sufficient cooldown, but that's another topic....
#518
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I have a similar setup, a 25 row setrab mounted where the A/C fan would go. This is behind a 50mm core rad that is well ducted and sealed to the front bumper, though I do have large hood vents.
I had noticed that my oil temps weren't as good as I'd expected,
The data suggests this setrab would be capable of ambient +70C given ambient air, which would be more than enough for me. Or put another way, taking air from behind the rad, needs an oil cooler sized 40-50% larger, assuming the airflow is the same (big assumption!)
I had noticed that my oil temps weren't as good as I'd expected,
The data suggests this setrab would be capable of ambient +70C given ambient air, which would be more than enough for me. Or put another way, taking air from behind the rad, needs an oil cooler sized 40-50% larger, assuming the airflow is the same (big assumption!)
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#519
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Oil temp hit 300F at California Speedway this weekend. It was crazy hot, 108 air temp. My car is a stock engine 1.8 NB. Has aluminum Koyo radiator that's properly ducted but no oil cooler. That oil temp was measured at the filter sandwich plate. With the Trackspeed kit no longer available what is the best off the shelf solution for a track only car? I am considering the Fab9 25 row Setrab kit. Any others I should look at? I'd rather not piece it together unless it's going to be significantly better and/or cheaper. Probably going to mount it in the fender well, have a full undertray so the steering rack location won't work. I could put it in front of the radiator if needed.
#520
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Best to have a decent race shop take a look at your setup. OTC cooler kits are a great concept, but usually they're a compromise at best in my experience. Mocal sandwich plate, then custom order the straight/45/90/etc fittings that best fit your application, then nylon braided hose of the correct length to avoid trigger wheels, accommodate mounting locations, avoid reroute hoses, work with filter relocations (which no one in this thread should own), etc, etc, and you've got a well functioning cooler setup.