Creating a new Airbox for the Firebird.

[TransAmDan]

The car has a RAM air hood, its not totally sealed, so not all the air if forced into the flter.

Does the air filter flow enough now its a 383ci converted from a 346?, I wonde rif it can be inproved. On another threat I'm increating the intake monifold from 3 inch to 4 inch openening. This means I need 4 inch on the air lid, or create a new air box.

Buy or create a new air lid. This would be useing the original air filter.

Or create one of these.

I'm looking to create the later, with 2 K&N cone filters.
This one looks ideal, but will it fit?

High-Flow Original Universal Air Filter - 3-1/2"ID FLG, 6"B, 4-5/8"T, 6"H

3-1/2"ID FLG, 6"B, 4-5/8"T, 6"H

www.knfilters.co.uk

3.5inch pipe, I can 3D print a converter from 2 x 3.5inch pipts to 4inch with a 45degree direction.

Will the fit under the hood? Well for that I needd to 3D scan the bonnet and area where it would go.
It looks like the could fit.

A view from the intake monifold looking forward. Filter almost touching the hood, and around a 10mm gap at the bottom.

Looking promising so far. Lots more work to do.

 

[TransAmDan]

3D model showed I had around 5mm above and below the filter.
Next was to print a scale model of the filter just be sure before spending £140 on a pair of filters.
The fit is good. Actually surprising how high it sits but it fits. There will be two, the other will be a mirror image.

Coming together well so far.

 

[TransAmDan]

The ar box is coming along well. Checking cearance with the bonnet to allow 10mm for the gasket. Still alot more to do, but it is progressing well.

 

[TransAmDan]

New air temperature sensor has arrived. Old one was original, still worked. As I'm making a new air box/MAF assembly it's an ideal time to model in a hole for a new one. So it's here, I can measure it to incorporate into the design.

I got a fridge magnet Darren. They seem to fall out of the boxes going to Wales.

 

[saleen 192]

that 2 i havnt got lol,,,,,,,

so how much 3d ink and time to print then? you going to Monika it with a sponge bob somewhere lol,,,,

 

[TransAmDan]

that 2 i havnt got lol,,,,,,,

so how much 3d ink and time to print then? you going to Monika it with a sponge bob somewhere lol,,,,

Great idea, I could put Sponge bob right at the front between the two filters. Wont be in colour as the high temprature stuff is only available in black. It could be raised and will be visible.

As for ink/filament. I think its looking around 1.2kg, I have brought 1kg for £72. I havn't tried optimising the usage. I'll do that once the design is done. Atleast this one is totallly custom. Others on the market seem to have fitment issues in the comments.