GT3 Cooling is a placebo

D

David OReilly

New member
I was curious as to why the paid for setups always seemed to have brake and water oil rads fully open.
Had they not bothered, did they want us to fine tune based on ambient temps.
So I ran a test:
Took 911 GT3 with a familiar setup (min wing)
Ran the Mulsanne cicuit down the straight with all cooling (brakes, oil, water rads) fully open and then fully closed.
Top speed identical. 290kph.
Ergo, cooling does not currently create drag.
 
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David OReilly said:
I was curious as to why the paid for setups always seemed to have brake and water oli rads fully open.
Had they not bothered, did they want us to fine tune based on ambient temps.
So I ran a test:
Took 911 GT3 with a familiar setup (min wing)
Ran the Mulsanne cicuit down the straight with all cooling (brakes, oil, water rads) fully open and then fully closed.
Top speed identical. 290kph.
Ergo, cooling does not currently create drag.
Click to expand...
I thought as much.

The brake temps do have a slight effect on braking consistency, mostly in hypercars I guess (due to no ABS), where cold brakes tend to seem to snatch easier when slightly out of the window because they are opened fully on most paid setups.
 
Good, simple test. Thx for posting it.

There is another theory that engine temp should have a slight effect on power, but it's probably also placebo (i.e. not implemented)
 
If you only did one lap, you didn't measure anything.

For engine and brake heat it will differentiate on further laps i think.

For engine cooling, you will get optimal lap sooner if the engine heats faster, and also better brakes if they heat faster too.

If you don't play with these parameters you won't see anything different.

Do the same test but on second and third lap slam the throttle even harder, lower the TC, brake later and you will see the point.

It needs a lot of skills to exploit that, imo.

Marginal gains : That's how it's called.
 
TonyRZ said:
If you only did one lap, you didn't measure anything.

For engine and brake heat it will differentiate on further laps i think.

For engine cooling, you will get optimal lap sooner if the engine heats faster, and also better brakes if they heat faster too.

If you don't play with these parameters you won't see anything different.

Do the same test but on second and third lap slam the throttle even harder, lower the TC, brake later and you will see the point.

It needs a lot of skills to exploit that, imo.

Marginal gains : That's how it's called.
Click to expand...
I measured drag thankyou very much. Thats all I set out to do.

Have you any proof that a warmer engine produces more power?
Because as far as I am aware the game engine (ISI Motor) dies not facilitate that. At least it does not in RF2.
Cooling is simply a matter of drag vs durability in fully developed mods. IE you push cooling to reduce drag, but only to the limit of engine durability. Too little and the engine can overheat and die.

I have not discussed braking performance here.

Feel free to do any tests you want to prove anything you want.
 
Ho3n3r said:
I thought as much.

The brake temps do have a slight effect on braking consistency, mostly in hypercars I guess (due to no ABS), where cold brakes tend to seem to snatch easier when slightly out of the window because they are opened fully on most paid setups.
Click to expand...
Yes, I want to at some point figure out the braking (optimal temps), its a big deal in Open Wheelers in RF2.
 
Have you tried with more, even full, wing?
Maybe you're engine/gearbox limited and not drag limited at that point.
 
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The only thing i saw on engine heating is the radiator effect on rFactor2.
If you drag too close from exhausts, engine will stutter and loose power. If you close vents, it would probably be less active. I don't even know how to verify that.

At some point i played with drag coefficients and radiator effects.

It's surely right about drag instead of engine performances. I wasn't aware of that.
 
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