Oil Cooler/Reliability Mods

[ZDan]

Originally Posted by CSG Mike

Surely, there must be a reason someone decided that lower oil temps were better on the FA24, even though it results in worse fuel economy.

In addition to cooling oil a bit under high-rpm operation, isn't the water/oil Forester-type primarily to get oil temps to operational more quickly? In normal operation it wouldn't be cooling the oil as both oil and coolant will be in the same ~200F +/- temperature range, shouldn't impact fuel economy...

I've seen reports of -15F cooling with the Forester cooler, but also this report showing no cooling: https://www.ft86club.com/forums/show...2&postcount=17

Anybody know how effective it is for continuous track usage?

[jflogerzi]

Originally Posted by ZDan

In addition to cooling oil a bit under high-rpm operation, isn't the water/oil Forester-type primarily to get oil temps to operational more quickly? In normal operation it wouldn't be cooling the oil as both oil and coolant will be in the same ~200F +/- temperature range, shouldn't impact fuel economy...



I've seen reports of -15F cooling with the Forester cooler, but also this report showing no cooling: https://www.ft86club.com/forums/show...2&postcount=17



Anybody know how effective it is for continuous track usage?

It's not period.

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[M0nk3y]

Originally Posted by ZDan

In addition to cooling oil a bit under high-rpm operation, isn't the water/oil Forester-type primarily to get oil temps to operational more quickly? In normal operation it wouldn't be cooling the oil as both oil and coolant will be in the same ~200F +/- temperature range, shouldn't impact fuel economy...

I've seen reports of -15F cooling with the Forester cooler, but also this report showing no cooling: https://www.ft86club.com/forums/show...2&postcount=17

Anybody know how effective it is for continuous track usage?

This track in 50F ambient temperatures I was 255-260F with a Forester Oil Cooler

This video is the same track, with aero, and in 80F ambient temps with Perrin Cooler and I think I maxed 225?

[ZDan]

Originally Posted by M0nk3y

This track in 50F ambient temperatures I was 255-260F with a Forester Oil Cooler

This video is the same track, with aero, and in 80F ambient temps with Perrin Cooler and I think I maxed 225?

Ah, Mid-Ohio! Your car sounds kick-ass BTW...

[Dzmitry]

Originally Posted by jflogerzi

It's not period.

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Seems to be quite effective at keeping temps within 255-260F. And again... this is considering that it's being used for track purposes too. That sounds like a great improvement over the 270-290F+ people reach without a cooler.

[Ultramaroon]

Originally Posted by rice_classic

If the two are touching then the air flows through both without impedance - no fans needed..

There's a seal around the perimeter of the cooler to address that issue. I regret not taking more photos as it went together.

[norcalpb]

Originally Posted by Dzmitry

Seems to be quite effective at keeping temps within 255-260F. And again... this is considering that it's being used for track purposes too. That sounds like a great improvement over the 270-290F+ people reach without a cooler.

I’ve hit 280F+ with no cooler and with the forester cooler. I feel like at a certain point the thing just heat soaks.

Extremely recommended for those living in cold climates though.

[Dzmitry]

Originally Posted by norcalpb

I’ve hit 280F+ with no cooler and with the forester cooler. I feel like at a certain point the thing just heat soaks.

Extremely recommended for those living in cold climates though.

Gotcha, was not familiar with the cooler not holding up to extremes. But then again, I think my main points for the cooler is this:

1. It will be perfect for ALL DD's.
2. It will be great for MOST/ALL light track or autocross racers.
3. It may need an upgrade when going to more extreme/competitive tracking.

The car isn't designed for anything extreme, so if you fall into the 3rd category, you are likely upgrading a bunch of stuff anyway, which may include getting a better oil cooler.
Also, since I know little to nothing about it, I am curious as to whether it is the same exact cooler as the ones in the WRX and Forester, or if it is modified in some way to improve temps particular to this car?

[CSG Mike]

Originally Posted by ZDan

In addition to cooling oil a bit under high-rpm operation, isn't the water/oil Forester-type primarily to get oil temps to operational more quickly? In normal operation it wouldn't be cooling the oil as both oil and coolant will be in the same ~200F +/- temperature range, shouldn't impact fuel economy...

I've seen reports of -15F cooling with the Forester cooler, but also this report showing no cooling: https://www.ft86club.com/forums/show...2&postcount=17

Anybody know how effective it is for continuous track usage?

Have you ever observed your oil temps in normal operation? It's significantly higher than 200F, even just cruising on the highway at 70mph. This type of cooler will bring that temp down.

This particular cooler will have no meaningful effect on track.

[CSG Mike]

Originally Posted by Dzmitry

Seems to be quite effective at keeping temps within 255-260F. And again... this is considering that it's being used for track purposes too. That sounds like a great improvement over the 270-290F+ people reach without a cooler.

I was seeing 130C within 2 laps with this type of cooler when I was driving the Cusco FRS, which uses the Cusco cooler, which is similar to the OEM type.

[norcalpb]

Originally Posted by Dzmitry

Gotcha, was not familiar with the cooler not holding up to extremes. But then again, I think my main points for the cooler is this:

1. It will be perfect for ALL DD's.
2. It will be great for MOST/ALL light track or autocross racers.
3. It may need an upgrade when going to more extreme/competitive tracking.

The car isn't designed for anything extreme, so if you fall into the 3rd category, you are likely upgrading a bunch of stuff anyway, which may include getting a better oil cooler.
Also, since I know little to nothing about it, I am curious as to whether it is the same exact cooler as the ones in the WRX and Forester, or if it is modified in some way to improve temps particular to this car?

It is really only the sandwich plate/little tube thing from the forester I believe, and then you either have to find/cut your own hoses or buy a kit from like NED which is what I did. No modifications done to make it different than how it functions on the forester.

https://www.nedautoparts.com/product...oem-subaru-brz

This kit connects to the 2 coolant ports on the throttle body, but I've heard of a more correct way of hooking up the lines via different ports on the engine. I'm not sure if the "correct" way would've yielded any lower temperatures though.

Also regarding light tracking: I had my car for 4 years before it ever saw the track and I always wondered what exactly that meant. I didn't look at my oil temps on my first track day which was probably bad, but on my 2nd day I was hitting 280F in 90F weather within 9 minutes. I would let off the gas to cool stuff down, let 4-5 cars pass me etc...finally get temps down to 260 and then hammer it until I catch up with another car. The car waves me by and I floor it but I look at my gauge and bam its right back at 280. This guy is determined to let me pass as I want to cool down so we both slow down and take the next corner together. It wasn't fun having to worry about that kind of stuff, which is why I realize there really is no light tracking unless you are ok with dealing with these sort of situations. I was told by my local mechanic that you want a cooler if you "want to run your fastest laps", which is what I want to do, and why I ultimately went to a Perrin cooler.

[Petah78]

For anone that is interested in the Forrester OEM oil cooler, check out the post below. It has all the benefits of oil cooling yet with no pressure/leakage problems. Just you have to do a lot of custom work which I am not willing to venture into.

https://www.ft86club.com/forums/show...3&postcount=19

[RToyo86]

Originally Posted by CSG Mike

I was seeing 130C within 2 laps with this type of cooler when I was driving the Cusco FRS, which uses the Cusco cooler, which is similar to the OEM type.

While it doesn't seem to make much difference at race pace, does it help cool oil temps down quicker on a cool down lap?

For DD use I'll he grabbing one which seems perfect for a all weather car. I'm thinking maybe I'll just run a 5w30 during the summer months when the car sees light track duty and deal with this type of cooler not being particularly effective on track.

[jflogerzi]

Just gonna put this out here for NA the jr dual rad cooler is a great combo... For non FI it should hold up even under extreme track sessions(20-30 mins)

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