Cool me down to take another round

[razorlab]

1k fan showed improvement when used with a hood vent. It's all about getting air through the cooling stack and out

If the 1k fan didn't work, they wouldn't have it standard on the M cars and in the cooling package option for the M240i/M340i/M440i

Also comes standard on the hybrids like 330e/440e, etc

There are MANY fan tables at work in the DME. Another fun one is fan duty based on clutch temp.

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[TBK]

1k fan showed improvement when used with a hood vent. It's all about getting air through the cooling stack and out

If the 1k fan didn't work, they wouldn't have it standard on the M cars and in the cooling package option for the M240i/M340i/M440i

Also comes standard on the hybrids like 330e/440e, etc

There are MANY fan tables at work in the DME. Another fun one is fan duty based on clutch temp.

Yeah I agree that's. Bugger fan def has a place in the cooling stack. For street driven cars, in traffic....for cars at the track, in between sessions.

Where I can't seem to figure out if there's any value is mid session. I.e. would it help with 1 of 2 things:

1) stay out on track for longer periods
2) improve my cooling enough to have any kind of impact on lap times.

I'd love to bs proven wrong here tbh, because I already found that $500 1000W fan that looks pretty decent.

 

[Subydude]

If you're running at the limit of cooling I would expect to see (assuming the track has enough slow sections) very small cooling benefits during a session. I would not expect to see it having appreciable impacts on lap times. The hood vent in your profile pic will help the fan work, but the stock fan isn't a slouch either.

This is all subjective, but let's assume the big fan is 30% more efficient (200 more watts and better blade designs). Let's assume the slowest speed on track is 45 mph and then you're quickly back to 75 or greater. So for a given lap you might only spend 30%-35% of time below the speed level that matters. For that 30-35% the fan is at reduced efficiency anyway since there's airflow from speed already going through it and it's not drawing air so much as reducing backpressure. If you had a prior intake air temp of 50C and coolant temp of 95C you're talking about some reduction of the original 30% greater efficiency (since it's at speed) for 30-35% of the lap. I would expect you could likely data log and see a 2-3C improvement in intake temps when you're below the built in speed limit of the fan.

So I don't think it's going to make an appreciable difference, or at least not as much of one as just running a lap at 80% for cool down.

 

[razorlab]

I mean talk and waxing theory is fun and all but I think I'd rather use (and am) real world data to make choices.

If I had money for every time something on paper made total sense and that same thing happening in the real world was different, I would have some money.

 

[Subydude]

I mean talk and waxing theory is fun and all but I think I'd rather use (and am) real world data to make choices.

What was the temp delta before and after the fan install?

Did it allow you to do more hot laps in a row, or did you still take a cool down lap at the same general point?

 

[razorlab]

What was the temp delta before and after the fan install?

Did it allow you to do more hot laps in a row, or did you still take a cool down lap at the same general point?

I can already do as many laps as I want as far as cooling system is concerned. My tires on the other hand, not so much.

Nobody shares anything here but are still hell bent on being right, so I stopped sharing any actual real data. It's a waste of my time and mouth breathers will argue even when presented with actual factual data. Anyone is free to search past posts of everything data related I have shared.

 

[Subydude]

I can already do as many laps as I want as far as cooling system is concerned. My tires on the other hand, not so much.

Nobody shares anything here but are still hell bent on being right, so I stopped sharing any actual real data. It's a waste of my time. Anyone is free to search past posts of everything data related I have shared.

I would imagine in Dubai it's not dissimilar in terms of tires falling off unless it's some super high heat hard compound. Even myself on the stock cooling system run out of tire before I run out of intake temp capacity (on the stock tune).

I think I'm more interested in a yes/no on if my theory is in the ball park from your data. I've done a lot of cooling mods over the years to various cars, including fan stuff with venting and up to moving the radiator to the trunk, so most of my comment is based in real world experience. On this platform though I don't have hard data and would rely on extrapolation from other platforms

 

[razorlab]

I would imagine in Dubai it's not dissimilar in terms of tires falling off unless it's some super high heat hard compound. Even myself on the stock cooling system run out of tire before I run out of intake temp capacity (on the stock tune).

I think I'm more interested in a yes/no on if my theory is in the ball park from your data. I've done a lot of cooling mods over the years to various cars, including fan stuff with venting and up to moving the radiator to the trunk, so most of my comment is based in real world experience. On this platform though I don't have hard data and would rely on extrapolation from other platforms

Mods that made the biggest difference in cooling:

Intake manifold
Hood vent

Everything else just added to the whole

Another fun fact, our fan never operates at 100%, or even near it, with OEM tuning.

 

[TBK]

I would imagine in Dubai it's not dissimilar in terms of tires falling off unless it's some super high heat hard compound. Even myself on the stock cooling system run out of tire before I run out of intake temp capacity (on the stock tune).

I think I'm more interested in a yes/no on if my theory is in the ball park from your data. I've done a lot of cooling mods over the years to various cars, including fan stuff with venting and up to moving the radiator to the trunk, so most of my comment is based in real world experience. On this platform though I don't have hard data and would rely on extrapolation from other platforms

Dubai is def a different ballgame. That said, for me personally, my car is being built to be a time attack tool, not an endurance one. So i'm rarely out there for more than 8-9 laps before coming back in, and those laps would look something like this: 2 warm up laps, 3 hard laps, 2 cool down laps, 2 hard laps. Pit.

You will 100% run out of intake temp capacity in summer here before anything else, stock form or not. Crossing 160 IAT before your 2nd hard lap is done is not fun. We don't track much in summer though, if at all.

Mods that made the biggest difference in cooling:

Intake manifold
Hood vent

Everything else just added to the whole

Another fun fact, our fan never operates at 100%, or even near it, with OEM tuning.

Agreed. Slept on cost-effective cooling mod is an intake duct/snorkel whatever it's called. I have a measly 3D printed one and i did get the chance to see some pre/post figures. I'm sure i jotted them down somewhere....

 

[Subydude]

Dubai is def a different ballgame. That said, for me personally, my car is being built to be a time attack tool, not an endurance one. So i'm rarely out there for more than 8-9 laps before coming back in, and those laps would look something like this: 2 warm up laps, 3 hard laps, 2 cool down laps, 2 hard laps. Pit.

You will 100% run out of intake temp capacity in summer here before anything else, stock form or not. Crossing 160 IAT before your 2nd hard lap is done is not fun. We don't track much in summer though, if at all.





Agreed. Slept on cost-effective cooling mod is an intake duct/snorkel whatever it's called. I have a measly 3D printed one and i did get the chance to see some pre/post figures. I'm sure i jotted them down somewhere....

I've looked at the intake snorkel print stuff in passing. Did you find or design one that works?

 

[TBK]

I've looked at the intake snorkel print stuff in passing. Did you find or design one that works?

There are much better ones out there. The shop 3D printed a very basic one for me. Something like this:

https://cults3d.com/es/modelo-3d/va...HvwtiOqNSyCYRbqZToUAZ-OxJBoFaU2DzfedjY5h_ohop

+ mesh cover

 

[FLtrackdays]

Dubai is def a different ballgame. That said, for me personally, my car is being built to be a time attack tool, not an endurance one. So i'm rarely out there for more than 8-9 laps before coming back in, and those laps would look something like this: 2 warm up laps, 3 hard laps, 2 cool down laps, 2 hard laps. Pit.

You will 100% run out of intake temp capacity in summer here before anything else, stock form or not. Crossing 160 IAT before your 2nd hard lap is done is not fun. We don't track much in summer though, if at all.

Agreed. Slept on cost-effective cooling mod is an intake duct/snorkel whatever it's called. I have a measly 3D printed one and i did get the chance to see some pre/post figures. I'm sure i jotted them down somewhere....

You could always do the 1980s method and turn on the heat full blast from the engine only…

I swear it would bring temps down in my S2K

 

[TBK]

You could always do the 1980s method and turn on the heat full blast from the engine only…

I swear it would bring temps down in my S2K

i think i choose life instead

 

[Subydude]

Having done the heater method in the south east...I would also choose life. Maybe in winter with the vents pointing out the open windows.

I had a Miata a long time ago that had some issues and it would slowly overheat on track unless the heat was on (or it was below 80 degrees outside). Luckily the top was down so I would turn the heat on and point the vents up. Still was uncomfortable. But that trick does work if you're on the verge of overheating.

 

[AJRMKV]

Dubai is def a different ballgame. That said, for me personally, my car is being built to be a time attack tool, not an endurance one. So i'm rarely out there for more than 8-9 laps before coming back in, and those laps would look something like this: 2 warm up laps, 3 hard laps, 2 cool down laps, 2 hard laps. Pit.

You will 100% run out of intake temp capacity in summer here before anything else, stock form or not. Crossing 160 IAT before your 2nd hard lap is done is not fun. We don't track much in summer though, if at all.





Agreed. Slept on cost-effective cooling mod is an intake duct/snorkel whatever it's called. I have a measly 3D printed one and i did get the chance to see some pre/post figures. I'm sure i jotted them down somewhere....

I measured the delta with the duct and without it. But on a larger stock location turbo and manifold. Cruising delta is 5-10f wot multi gear delta is 13-15f. There's more data im leaving out, but I am Le Lazy. Worth $100 though.

The air box with my kit is sealed at the top and open near the exhaust so that had to be sealed and the box was thermal wrapped then heat shielded. That alone helped with cruising and sitting temps. Measurements above are all after this.

Bryan's heat shield design is also useful. I installed that too. Especially on an upgraded turbo and exhaust manifold

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