Window ducts/air circulation
 

Living here in Texas, it can be pretty brutal. Air was over 100, so I'm sure it was pretty hot in my car, too. Not sure if it's just another year of age or what, but the heat is getting to me. I noticed there is almost no airflow into the car.

Does anyone make a duct for the little window sail? Just getting some air moving inside the car would be great.
I think a cool suit is next.

In the old days, I saw some drivers tape/ziptie a short piece of dryer duct to the side mirror. I wasn't pretty, but it worked.

This?


https://makezine.com/projects/scoop-...r-window-vent/

lol, like this, but for the window sale in the driver's door

https://www.miataturbo.net/attachmen...ine=1338740248

I just ordered one of these. My plan is a lexan widow in the 1/4 window frame at the front of the door. I will miter out the naca shape and attach this duct to the inside.

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

BR

Details are none, but this is another idea
https://www.ft86club.com/forums/showthread.php?t=150482

I installed Naca ducts just like this in both the driver and passenger sail windows on my Miata. They move a TON of air when the car is moving. In the Miata world, there are lexan kits that come pre-cut in with the correct window shape and Naca ducts opening. You just insert the duct and rivet them in place. I am not sure if something similar could be done with a BRZ/FRS or not. The sail panel on the Miata has a frame, where the BRZ/FRS does not.

Window ducts/air circulation
 

I looked at doing something similar, but being an ewok sized human I find myself looking through the wing window on the driver side a lot when spotting apex's.

I saw this on a GT1 car last weekend. $5 in parts at Lowes. Vinyl downspout parts:
https://bl6pap004files.storage.live....&cropmode=none... https://bl6pap004files.storage.live....&cropmode=none

If you can live with a couple of HP loss, just run the HVAC blower motor. The air should be close to ambient as long as the car's moving

Just thinking out loud: I wonder if removing the cabin filter for track days would significantly help the air flow through the vents?

It would also help get shit into the blower, evaporator, etc. I've cleaned out the tray underneath the wipers. Blecch.

Prolly fine, though.

I dont think I want it. I swear significantly it's hotter than ambient and does more harm than good.

Works pretty good at 45 mph. In 2 weeks, I'll test at higher speeds at VIR.

I don't think so. The HVAC system is aided by the high pressure zone behind the windshield. Like @Ultramaroon , you'll just get gunk in your HVAC system. If you have the blower motor going, it's going to have pretty good flow already at max setting.

One thing that I didn't think about but did notice at a recent track day was that if you have hood vents, you car is likely going to suck in the hot engine exhaust air. The HVAC intake is the grating on the windshield cowl on the driver side. I was wondering why it seemed hotter than ambient during some points of my drive :sigh:

New driver cooling ducts to be tested this weekend at Portland on my STI.
$7 each side in downspout parts at Lowes.

https://bl6pap004files.storage.live....&cropmode=none...https://bl6pap004files.storage.live....&cropmode=none

lol, was looking for something a bit more integrated but beggars can't be choosers I suppose!

At this point I am thinking naca duct in the roof. Track car anyway so eff it :burnrubber:

I think our corner windows are a little too small to get airflow in compared to what can be replaced in a Spec Miata, buttt I'm thinking with some ingenuity and customization + 3D printing something could be made at a smaller scale, but I guess at what cost for looks? The drain spout is pure function and cheap, but probably not my favorite choice either

I think you are right about the air flow over the 1/4 window. My first attempt at a duct was a failure as it did not direct any air into the car. I realized that the A pillar and mirror interfered with the flow of air across the 1/4 window. A NACA duct needs unobstructed air flow to work.


https://connect.xfinity.com/appsuite...ain&width=1024

Hey Kelse! Funny running into you on the forums (we met at ECR). You're now officially not allowed to laugh if I zip tie a gutter drain to my car :lol:

My gutter downspouts worked pretty well. There was flow into the car, but not a hurricane. I think an extension on the front would probably improve the flow even more.

So as an update, BSP made this as a solution for the DS and I just had them make one for the passenger side it worked so well. Lots of airflow.

https://i.imgur.com/FdyOjeZ.jpg
https://i.imgur.com/9Uyy84w.jpg
https://i.imgur.com/WDsolLe.jpg
https://i.imgur.com/2EztJiw.jpg


Only thing I'm pondering is removing the rear "sail" glass. I'm thinking it would help air flow more. If not, I'm going to remove the factory vents/bleeder flap things in the rear to help get negative pressure behind the seats.

this gives me some pretty terrible idea's about making an old-style window that can flip around in that area...

It flows a lot of air. It made a big difference. There's just NO AIRFLOW in that car.

The more I think about it, the more I think it's because of a lack of an exit for the air rather than needing ducting.

Yeah, you need a spot at a low pressure area of the body to evacuate the air from the cabin. Vent at license plate position on trunk?

Careful! Vent location at the base of the rear hatch was a major fail for the first year 240Z. I spent years sucking exhaust gasses whenever I didn't force fresh air into the cabin.

Didn't even think of that. Good point.

Great point.
Maybe I'll just make and "exit" duct out out of the side glass behind the door.

The best solution would be lexan rear with side louvers like rear engine cars have, but I'm not spending that much on this project.

Don't forget that the actual cabin exhausts are still there. I think they work better with the seat folded down and such. If it's a dedicated track rat, maybe test with louvers removed altogether.

Yeah, I'm thinking of just propping them open somehow.

yep, we're absolutely travelling back in time to 1986.
https://www.bimmerworld.com/51378252...Gasket-ETK.jpg

I wonder if it feasible to make a 1/4 window that would open like a van rear window.

Makes sense. We're trying to cool a car without air conditioning lol

Also, how the hell did people do road trips without air conditioning!?

Easy. They were used to the heat.

FRS is my first car with working AC. I've been driving since 1980.

It's my first car without it, ever, lol. I also started driving around 2000.

Augh! You kids. Spoiled rotten.

Haha I’m close to 40!

It wasn't as hot back then.