CounterSpace Garage 2014 BRZ (aka BRZ 2.0) Street Concept build journal

[Frost]

Did you guys replace the OEM radiator too? Saw the thread with the supercharger intercooler and the oil cooler but didn't seem to see anything about the radiator.

[CSG Mike]

Originally Posted by Frost

Did you guys replace the OEM radiator too? Saw the thread with the supercharger intercooler and the oil cooler but didn't seem to see anything about the radiator.

Not yet; that's next.

[smbstyle]

Originally Posted by CSG Mike

For now; it won't be here much longer. We want the temps to be lower; that's what this engine likes.

What radiator will you be going with?

[CSG Mike]

Originally Posted by smbstyle

What radiator will you be going with?

It's strictly a prototype at the moment; it's a brass core copper finned unit. It's a bit heavier than stock, but isn't any aftermarket oversized radiator?

This will allow the radiator to pull heat out of the coolant with greater efficiency than an aluminum radiator.

[suaveflooder]

this thread has so much win!

[CSG Mike]

Yesterday, we did some stress testing.

Short results:

- Tripledigit speeds were sustained for 10+ minutes on a closed course (test ovals are nice, aren't they?). Oil temps held steady. Coolant temps were a bit high for our liking; they weren't at dangerous levels, but this engine definitely prefers to have coolant closer to 180F than the 200F+ we were seeing. Intake temps stabilized at about 105F at sustained WOT, compared to a 65F ambient.
-- In other words, all the cooling systems worked, but we want our coolant temps lower. Perfect, since we're going to be putting in the latest prototype radiator.

- On track, we stress tested the Winmax W4 on stock brakes, with heat cycled RS3s, and the supercharger. Lets just say, for FI cars, you need to have full race pads. The heat reading was off the scale (literally) on the laser temperature gauge when we pulled off track.

- We also tested the latest CSG-Spec SRC prototype. I believe we've found a new best valving, particularly since the street and track damper settings are now one and the same!

[OrbitalEllipses]

Originally Posted by CSG Mike

- On track, we stress tested the Winmax W4 on stock brakes, with heat cycled RS3s, and the supercharger. Lets just say, for FI cars, you need to have full race pads. The heat reading was off the scale (literally) on the laser temperature gauge when we pulled off track.

I would never FI without BBK. Stock brakes don't have the heat capacity for repeated braking from the speeds you see with FI.

[CSG Mike]

Originally Posted by OrbitalEllipses

I would never FI without BBK. Stock brakes don't have the heat capacity for repeated braking from the speeds you see with FI.

I'd agree, but we're doing this strictly for the sake of testing and data. We already know they'd cook, but wanted to see WHEN they would cook.

[CSG Mike]

Originally Posted by normancw

Thanks Mike! A couple of questions:

• What did the oil temps reach?
• Is having coolant closer to 180F better for performance and/or reliability?

It stabilized at about 235F. Remember, this was a LONG time of sitting at 6000+ RPM.

Better for performance, probably negligible effect on reliability.

[phastafrican]

Great feedback

[Boxer486]

Originally Posted by CSG Mike

Yesterday, we did some stress testing.
- On track, we stress tested the Winmax W4 on stock brakes, with heat cycled RS3s, and the supercharger. Lets just say, for FI cars, you need to have full race pads. The heat reading was off the scale (literally) on the laser temperature gauge when we pulled off track.

Just trying to decipher your statement more clearly. My chats w/ Essex suggest the sprint kit should manage heat for most applications road and track w/ the right pads. Your testing seems to be more along the lines of endurance so I presume that would more closely suit their endurance kit and brake cooling solution. In other words, the sprint kit w/o duct cooling would be insufficient for your testing, am I getting that right?

[CSG Mike]

Originally Posted by Boxer486

Just trying to decipher your statement more clearly. My chats w/ Essex suggest the sprint kit should manage heat for most applications road and track w/ the right pads. Your testing seems to be more along the lines of endurance so I presume that would more closely suit their endurance kit and brake cooling solution. In other words, the sprint kit w/o duct cooling would be insufficient for your testing, am I getting that right?

We were testing with the stock calipers and rotors, not the Sprint kit.

But yes, we will be upgrading, we already have data that suggests that we will overwhelm the Sprint kit's capacity for our specific application. I suspect that won't be the case for most people. We're already using 800C race pads.

[Boxer486]

Originally Posted by CSG Mike

We were testing with the stock calipers and rotors, not the Sprint kit.

But yes, we will be upgrading, we already have data that suggests that we will overwhelm the Sprint kit's capacity for our specific application. I suspect that won't be the case for most people. We're already using 800C race pads.

Thanks, that's what I wanted to know. I'm not surprised after reading Edmunds had melted the seals on the stock calipers w/ base power.

[CSG Mike]

Originally Posted by Boxer486

Thanks, that's what I wanted to know. I'm not surprised after reading Edmunds had melted the seals on the stock calipers w/ base power.

That... happens to virtually every stock caliper, regardless of car