[2JZ-GZE]

Looking at simple ducting from the lower door to over the radiator support. But there's not much area available next to the OEM snorkel under the radiator support cover, which will need to be cut for the duct to access air outside the engine bay. V3 might look at a combined duct entrance to maximize inlet area for both ducts.




View attachment 24464

I've been thinking about trying to design something like this, very interested to see where this goes!

 

[snowrx]

Just DIY tinkering, playing with the scanner and OnShape.
I've been looking at what's on offer for intakes and thinking about a cheap mod that truly excluded engine bay air to the OEM airbox. A work in progress, at this point I'm thinking a 3D print with an appropriate filament. I guess it would also be possible to print just the duct interior in vase mode and then wrap that core with fiberglass or carbon for a more durable or flashy item. If our cars were a high volume model a vendor could blow-mold them cheap.
TBH, I could of fabbed a working sheet metal duct in 1/4 the time I spent in CAD but it's a tool learning project for me.
My old printer has not been happy with the long prints, as I'm using up some iffy filament with poor layer adhesion.

The mock-up in the engine bay, I'm not cutting the radiator support cover yet:

This car has no datalogging fitted, so the best I'll be able to do is look at a dual channel thermometer, when the snow goes away.

 

[samagon]

I wonder, if rather than having some tape over the cold air supply (presumably to keep the colder air from outside just exiting into the engine bay), you could route the secondary intake to slot into the space that is taped off?

 

[snowrx]

I think the existing primary intake duct/scoop would be too small to feed both ducts.

 

[snowrx]

Judging by the folks dropping dollar$ on the Yaris duct, my 25 cent aluminum tape mod to the stock duct must be too low-rent.
The stock primary duct has a weird flow path anyway. So now there's a Primary duct in OnShape that omits the opening to under hood air.

I split it in two sections to fit my print bed with the least support material, but you could Boolean it back together with a few clicks.

 

[Sleeper]

Hope it doesn’t get sucked in!

 

[cpxii]

My old printer has not been happy with the long prints, as I'm using up some iffy filament with poor layer adhesion.
View attachment 24474

The mock-up in the engine bay, I'm not cutting the radiator support cover yet:

What filament are you using? I've been having good results with PCTG (like PETG but higher impact resistance and less moisture absorption). Prints like PLA which is nice

 

[snowrx]

Right now I'm using PETG, might try them in Nylon or ABS if it fails under the hood. Not a critical part, if they break I'm back to the factory warm air intake. I'll look into PCTG; there are so many materials available now...

 

[snowrx]

FYI; The free OnShape online CAD service requires your designs to be Public, so if someone wants to use these (amateur) designs you can just sign up, search for GR Corolla and export them in different formats, or copy them and modify your copy. CawaGR's mini key fob is there also.

 

[Beardedserb]

Im just here to buy one off you when ready lol

 

[rohmbd]

Sign me up!

 

[snowrx]

Test fit of V1 on the car. OnShape file is now V2, which is a bit bigger to better match the scoop outlet and airbox socket.

I like the look of MST's V2 radiator cover/scoop combo for their air box, that maximizes the area from grille to airbox.

 

[GREsquire03]

It's too bad the V2 MST radiator cover isn't independently available nor does it look like the tanabe radiator plate include a ram air scoop towards the airbox.

 

[snowrx]

V2 fits the scoop better, and has a larger cross section at the airbox. You can print yourself a red one if you want. I used 1mm foam tape at the airbox for a gasket.

 

[CFLip2X]

have you though about editing this file? Hel'Scoop System - Toyota GR Yaris

 

[snowrx]

Hadn't seen it. I don't know how the dimensions might carry over to the GRC. Seeing it does make me think about having the duct fit over the airbox spigot rather than inside, increasing the cross section at the narrowest point.

 

[Maxg]

Test fit of V1 on the car. OnShape file is now V2, which is a bit bigger to better match the scoop outlet and airbox socket. View attachment 25566

View attachment 25565
I like the look of MST's V2 radiator cover/scoop combo for their air box, that maximizes the area from grille to airbox.

Thought maybe you put it up on another site but don't think this is the same as your is it? Didn't think yours required trimming.

2023+ Gr Corolla solid intake duct by kyle goerlitz | Download free STL model | Printables.com

 

[snowrx]

Thought maybe you put it up on another site but don't think this is the same as your is it? Didn't think yours required trimming.

2023+ Gr Corolla solid intake duct by kyle goerlitz | Download free STL model | Printables.com

Nope that's not mine. My ducts are public on OnShape. Users might want to tweak the design, but an .stl can be exported from there as is

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The secondary duct will need trimming of the rad cover to fit and maximize the airway.

 

[DNR_Medic]

@snowrx thanks for the file it came out great. Printed in ABS, sanded down the print lines, sprayed filler primer, and painted red.

 

[driftfreaq]

This reminds me of How Velossa Tech designed their Big Mouth setup with intake for our cars.

2023+ Toyota GR Corolla BIG MOUTH Ram Air Intake Snorkel PLUS High Flow Induction

Upgrade your 2023+ Toyota GR Corolla with the Velossa Tech BIG MOUTH PLUS High Flow Induction, designed for bold style, easy installation, and real performance gains. Designed for maximum airflow to your OEM airbox, this dual feed intake uses the OEM opening as an air feed as well as a separate...

www.velossatechdesign.com