Thought - Oil cooler should go behind radiator not in front. Oil temp is likely higher than water temp. So air passed through radiator could still cool the oil but perhaps not the other way round. So oil cooler should go behind radiator space permitting.

Mitsuatb

 

Mocal Laminova in the top hose?

 

Yea I am now thinking if you can lower intake air temps past ambient temp then you generate less heat in your system. This leads me down the rabbit hole of designing a Water to Air manifold intercooler or using meth injection.

 

i wasn't aware our system had oil heat issues, beyond what (i believe) we both run, which is the setrab 25row (https://www.maperformance.com/produc...on-8-9-evo-ock). from what i vaguely remember, this is almost too good at cooling?

 

It does ok. Depends on the car.

The over cooling only occurs on the street in cold weather.

 

Fair point.
So if you see 230 oil temp, you pull of track?
I don’t know of any car that I’ve looked at that runs <240* oil temps on track here in FL properly driven.
Im definitely not pulling the AC so MAP oil cooler is about as much as I’ll do.

 

I'll ease up for half a lap, it cools off quick. My car would need a bigger cooler for serious racing.

 

I've tried to do that previously, there isn't actually enough room with a stock frame turbo and the OEM sized radiator.
To do the oil cooler behind the radiator you'd need to shrink the radiator and move it below the upper radiator support, or change the turbo system.

Kinda - not Laminova, just my own design/system. Still testing.

Easiest way to lower oil temps (with no mechanical changes) is using E85 based fuels. I'm guessing the reduced EGT's help with the oil temps (Turbo manifold heat-soak??). Typically 20-25ºF oil temp drop is normal from 93 pump to E85.

There is a very small amount of oil flow to the cooler even with the oil thermostat in the "cold" position, so you can block the cooler for extended street use if desired. But with 93 octane gasoline fuel, it's very easy to generate oil temp.



Oil Temps:
Lap 1 - 95.8ºC
Lap 2 - 111.8ºC
Lap 3 - 121.2ºC
Lap 4 - 125.7ºC
Lap 5 - 125.0ºC
Lap 6 - 125.9ºC
Last lap - 127.7ºC

This is with a 25row oil cooler, 400whp with 93 octane equivalent pump gas, and a tomei thermostat killer.
The Tomei thermostat killer forces ALL oil through the oil cooler at all times. OEM or HKS Thermostat has higher oil temps (tested/verified).
Customer will be adding a second 25row oil cooler.

 

I know this would be expensive to achieve in our platform as everything would be custom, but what BMW used to do on the M cars was stack the radiator on top of the oil cooler. That way each cooler got its own fresh airflow so to speak.

 

Why are u all trying to reinvent the wheel? the oil cooler has its own spot infront of the guard already with a dedicated hole in the bumper etc which you can duct to it. you can easily fit a larger cooler in this spot also.

 

When you're running pump gas (non ethanol based), it's very easy to overwhelm the oil cooling system even with a larger oil cooler (25row for example). Even at only 400whp.
You could say "130ºC oil temp is no problem, dont worry about it".
Or you could add another cooler or system to lower that temp.
It just depends what the driver/customer is happy with.
Me - personally - I dont want oil temps of 130ºC. 100-110ºC is more desireable.

 

have you or anybody you know of tried to make a proper duct to feed the cooler itself from the bumper? I remember the factory bumper and cooler on my evo 7 bumper had some sort of plastic air guide setup there.

Im curious to try this myself as ive seen on hot days oil temp up around 140c at the end of a race.

It works on radiators so i assume it would work on an oil cooler also. could also try a fan on the back side to pull air through it?

 

It already has air guides and still works with the larger setrab units. You can probably install one on the other side if the acd pump was relocated

 

The crappy part of the stock cooler location is it heats up the RF tire as well. Usually see 30*+ higher temps on the RF tire vs LF.

 

Ha that’s perfect for my local tracks! Very left heavy at Sebring and Homestead