I had an... interesting idea including water and an air intake

my idea is someone creating a mod to be able to get rid of the air intake and make the illusion that the air is being stored in an area specifically an air tank.
my idea is that there must be a way to delete the air intake and have no need for air
and also maybe a way to delete exhaust particles
my idea is four tanks in in the back, two for fuel which would be the fake air tanks which will do nothing
and two exhaust tanks which will do nothing as well.
this way it would give the illusion of having an air and fuel tank while be able to to dive underwater.
the tanks will be in the back of the following cars: d series, h series, and maybe t series.
but one condition has to be met, a lower base fuel volume.
i know this is a lot but why not just say this for the hell of it
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oh and also tires which can withstand the water pressure

 

Well, engine at peak power output can easily take 400 000 liters of air, few scuba tanks might not be enough for very long time.

Some reading:
https://www.f1technical.net/forum/viewtopic.php?t=5729

 

well mods aren't always that realistic anyways

 

Like which ones? Firepower's 6x6 isn't a real vehicle, but the engine, weight, etc is.

 

well yeah true
but this is one of those "why not" things

 

How about these:
https://www.beamng.com/resources/waterproof-pessima.1918/
https://www.beamng.com/resources/waterproof-cars-pack.1937/

 

If I want to drive under water, I just pick up one of the electric vehicles.

 

Or a vehicle from an older version of the game. Ex: Gabester’s Monster Truck

 

Yes, but there is thing with electricity and water, you know how well they play together...

 

https://simpsons.wikia.com/wiki/Elec-Taurus
(read the 'History' paragraph)

 

... but why not just make it anyways
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i prefer at least some realism

 

well mods aren't always THAT realistic anyways
I didn't say it had to be highly realistic

 

Did you turn on me because I proved you contradicted yourself? Niiice

 

not everyone pays attention to air intake but they at least know an engine needs oxygen to work so i'm mostly saying is that for realism i'm at least going for a good middle-ground so people understand how it would work but not make it over detailed