Custom air box pic request and K&N warning.

[trlrider]

I want to do that on my 88 - only with a 2" cowl hood maybe? When you get yours built, post what you did with part #s and I'll steal your design with pride

LOL! Will post it up once the cold air box gets going, but more then likely late summer after my son's shooting season ends in July.
Will not be any part numbers. Will be hand fabricated. The air box will sit on the carb and be fit to seal on the hood. The T/A scoop will be molded into the hood. Figured it would be just to big a pain in the rump to make it a true shaker and considering I am still playing around with intake and spacer combinations it will be easier to adjust the air box then the scoop itself.
As it sits currently with the factory air cleaner assembly there is about a 1/4 clearance from the top of the lid and the hood. Tall intake, TBI adapter and additional spacer. I plan to use a air filter assembly similiar to what you have in your profile pic with the filtered top and a drop base.

The plan is to first build one from aluminum sheet much like we use on late model stock cars. One the design is baselined and shows to work we will take it down to my neighbors shop and build a mold to build a fiberglass or carbon fiber copy.He has plenty of scrap material from his business to do either. At least that is the plan.

[steveo]

i love building airboxes and filter setups from garbage laying around my basement. homemade is the way to go but mine definitely don't look the best

i'd try to think like the OEM does when making an airbox/snorkel/etc and follow as many of the standard rules of design as you can

does rain or road splash up easily enter the airbox? and when it does, does it get trapped, does it drain, or does it just pour right into the filter? you can always throw more plastic at it

is it easy to access the filter so it can be frequently cleaned/serviced/checked?

if it's a panel filter in a box is there enough room for heavy debris like bugs and moths to settle in the bottom until they can be removed, or are they just going to pile up and cling to the filter?

if the airbox is frame rather than engine mounted, is there enough flex in the tube between the intake and filter box so it doesn't break or yank the airbox out of place under maximum torque?

is it restrictive in any way, or does the airflow have to turn way too many corners to get where it's going? you can measure for heavy restrictions at full throttle with a vacuum gauge but to truly make sure the airbox isn't impeding airflow you'd want a manometer, personally i just make sure the air passage is always the same or bigger than the throttle body

does it SOUND GOOD? some engines have a symphony of beautiful intake noise and some require heavy muffling, and your airbox and its intake tube is pretty much your intake muffler, so your airbox choice could be the difference between a 'nice muffler' and a 'fart can' under your hood, crappy designs will whistle too

is the air 'fresh' or is it breathing air that's hotter than necessary? would it be hard to make the intake air fresh?

as far as k&n filters go, they don't let much dust through unless you don't service and oil them, i wouldn't worry too much about a tiny bit of dust, your engine makes carbon dust all on its own, a little pollen isn't going to make a big difference

[trlrider]

i love building airboxes and filter setups from garbage laying around my basement. homemade is the way to go but mine definitely don't look the best

i'd try to think like the OEM does when making an airbox/snorkel/etc and follow as many of the standard rules of design as you can

does rain or road splash up easily enter the airbox? and when it does, does it get trapped, does it drain, or does it just pour right into the filter? you can always throw more plastic at it

is it easy to access the filter so it can be frequently cleaned/serviced/checked?

if it's a panel filter in a box is there enough room for heavy debris like bugs and moths to settle in the bottom until they can be removed, or are they just going to pile up and cling to the filter?

if the airbox is frame rather than engine mounted, is there enough flex in the tube between the intake and filter box so it doesn't break or yank the airbox out of place under maximum torque?

is it restrictive in any way, or does the airflow have to turn way too many corners to get where it's going? you can measure for heavy restrictions at full throttle with a vacuum gauge but to truly make sure the airbox isn't impeding airflow you'd want a manometer, personally i just make sure the air passage is always the same or bigger than the throttle body

does it SOUND GOOD? some engines have a symphony of beautiful intake noise and some require heavy muffling, and your airbox and its intake tube is pretty much your intake muffler, so your airbox choice could be the difference between a 'nice muffler' and a 'fart can' under your hood, crappy designs will whistle too

is the air 'fresh' or is it breathing air that's hotter than necessary? would it be hard to make the intake air fresh?

as far as k&n filters go, they don't let much dust through unless you don't service and oil them, i wouldn't worry too much about a tiny bit of dust, your engine makes carbon dust all on its own, a little pollen isn't going to make a big difference

Agree, half the fun of it is engineering with common items and coming up with something all your own. Prototyping with scrap, cardboard, etc.! Once the design is settled and shows promise of the desired result, a final version can be built from better materials.\

[1project2many]

Is this what you're looking for?
https://www.thoroughbreddiesel.com/77-3064ktk/


It looks like a person could do a decent job building one using " 4" mandrel bend 90 " search results on Ebay and some silicone couplers. No?

[trlrider]

Is this what you're looking for?
https://www.thoroughbreddiesel.com/77-3064ktk/


It looks like a person could do a decent job building one using " 4" mandrel bend 90 " search results on Ebay and some silicone couplers. No?

I actually find it comical that K&N charges what they due for some of their so-called cold air systems. That flimsy box is already distorted out of the box.
I have one of them in my workshop someone gave me that was supposedly made for a TBI C1500, I think it let's more hot air in then the factory setup as it does not seal to the hood or the fender opening.

Yes, with a little bit of resourcefulness and imagination a match better functioning and looking component can be built.

[Fast355]

I actually find it comical that K&N charges what they due for some of their so-called cold air systems. That flimsy box is already distorted out of the box.
I have one of them in my workshop someone gave me that was supposedly made for a TBI C1500, I think it let's more hot air in then the factory setup as it does not seal to the hood or the fender opening.

Yes, with a little bit of resourcefulness and imagination a match better functioning and looking component can be built.

That is the setup I want, except without the tube. That is a rigid metal heatshield.

[trlrider]

That is the setup I want, except without the tube. That is a rigid metal heatshield.

I will take a picture of the one metal one that I have, if it works for you, you can have it.
We will be rolling thru Ft. Worth on our way to Grand Island, NE this coming Saturday somewhere around noon!
We usually stop at the Pilot truck stop by Cabela's up there on the way north.