"Rear Axle Differential Temp Increased, Decrease Speed" warning

[68fbjjz109]

I'm going to try a few other things before I go that route. 52mm compared to 36mm is a good jump in cooling efficiency though.

I asked them about the increased volume and weight, and they said they would get us the answer.

My personal goal for my car is 3500 lbs. So I am wary about a larger radiator if the car don't really seam to need it. Unless the have supplemental cooler provisions for drivetrain, and the increase time on the track. I likely will leave the PP rad.

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[Brent Dalton]

I had a radiator with a built in oil cooler on my T1 Z06. I've never been a fan of the combined set up. I'll also compromise weight at the expense of reliability. Every one has different goals and rules for their cars though. While I run time trials and only need one flying lap so cooling isn't a regard in that concern, I enjoy normal track days and 30 minute sessions just as much. I think the Mishimoto radiator is money well spent if you are keeping your car above 5000 rpm's on a road course the entire time. I'm not ready to give up on the stock pp radiator yet though. Fortunately the presale ends on June 6, and my event will be June 4-5. If I can't make it work, I'll be buying the Mishimoto unit.

If you have a stripped out base model(i.e. no options), 3500lbs is pretty easy to get to without driver. If you are talking with driver, I think it is still easily doable, but will require a little more work and you may have to compromise some crate comforts for the street.

We will need to migrate all this to the cooling thread eventually to keep this one cleaned up.

 

[jhols]

I really like the bigger core of the Mishimoto radiator, however, I would love it if they finish their dedicated oil cooler. A lot of the FRS/BRZ track crowd has them and it runs way cooler than stock.

 

[GT_Roadcourse_Newb]

Random question - why arent radiators made - at least partially - out of copper? Way way better thermal conductivity than aluminum.

Also, why arent flywheels made from titanium or carbon fiber?

 

[jhols]

All comes down to price! Also copper corrodes

 

[EXP Jawa]

Radiators used to be commonly made from copper. I had a radiator in my first Mazda 323GTX corrode so bad that at least a third of the fins were simply gone. I have a picture of it somewhere. I used it until the corrosion compromised the core and started leaking, but it was a winter car and I got away with it. Of course, a radiator like that could be re-cored if the tanks were intact.

But, really the real issue is cost. A typical modern car has an aluminum core with plastic end tanks. Much cheaper to make in high volume, and generally still quite effective. Obviously, the folks designing the system would take into account the materials being used and their heat transfer properties, and size accordingly. Generally. So, it shouldn't make a difference in performance, assuming they did their job well. Also, keep in mind that copper is on the order of twice the density of aluminum, depending on the alloy. So, mass is a factor too.

 

[Optimum Performance]

Weight, Cooper adds mass, and cost. Why plastic tanks. Built in replacement, in any salt belt region aluminum dissolves just as fast. A separate oil cooler with fan will be more effective, the water gets hot because it's trying to cool 300F oil. Take that burden off the PP radiator and you will solve two problems. A thicker radiator will add surface area but it takes the air more effort to get through it, plus without a heat extractor type hood only so much air can pass through. I think that's why the Continental Shelby's run screens for front inner fenders, it gives a place for the heat to go. Get the heat out from under the hood eliminates a lot of heat soak the cooling system needs to contend with. But I'm no heat transfer specialist ;)

 

[MEAN427]

Posted this in one of the other heating threads as well...

Hey folks with the 2016s and are trying to find a way to read diff temps. I got clarification from lund about the ngauge:
"The sensor reading on the diff is a DMR, rather than a generic PID which is what the nGauge reads and displays. We haven't yet released nGauge firmware that reads that DMR file, but it will be available in the future for you to download and update with. Cars with trans temp sensors have a TOT reading which can be displayed on the nGauge."

Maybe if enough folks pester them about the diff temp sensor they will make the update in the software sooner than later

 

[Brent Dalton]

Thanks for running it to ground! That is exactly what we need!

 

[Bahndvr]

So a DMR is just an enhanced PID then buy an Auto Meter DashControl or something that supports that PID. That should get them motivated.

 

[Brent Dalton]

So a DMR is just an enhanced PID then buy an Auto Meter DashControl or something that supports that PID. That should get them motivated.

I've searched around and haven't found anything that supports it. If you find something that does, please share.

 

[Bahndvr]

After some Google searches...
There are PIDs and there are DMRs and ether can be read.
There are SAE PIDs, vehicle PIDs and enhanced PIDs per Wiki
Not much on DMR other than "highly protected"

 

[Brent Dalton]

After some Google searches...
There are PIDs and there are DMRs and ether can be read.
There are SAE PIDs, vehicle PIDs and enhanced PIDs per Wiki
Not much on DMR other than "highly protected"

Sounds easy enough, right? I mean, there is a value the computer is reading off the sensor...

I have two OBD II readers and several apps that don't read it. I've tried several PIDs without luck. I also have a hptuners nGauge. Hopefully someone cracks the code on it soon and adds it to something so we can monitor.

 

[Bahndvr]

DMRs will read specific controller memory locations. These are literally direct reads of a given memory address. As such, they require each individual strategy to be mapped out, so they can figure out which memory addresses correspond to which variables in the ECU.
Sounds possible just has to be set up...

 

[GT_Roadcourse_Newb]

Yeah, what he said!

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