Why do we enclose them?

[2005vzute]

Was having a think today about pos filters n stuff...know we all know to be legal they have to be in an enclosed box blah blah blah..but why?

why does a pod filter need to be enclosed? :S it's got me mind boggled...

[GenReaper]

mainly due to fire risk.

[RiCeY]

Its actually better to enclose them to prevent the hot air around the engine entering it. The hotter air is the less dense it is which means less power basically.

[ryno_vrx]

had something to do with fire and/or exploding

[wraith]

Fire reasons. If the filter is oiled and a back fire occurs the theory goes it could ignite the pod. The chances of this happening how ever are slim.

[Jesterarts]

Yep, posts in here have been spot on.

There are 2 reasons for enclosing a pod filter, one is for legal reasons the other is for performance issues.

1. Because MOST pod filters are washable oiled filters, they need to be enclosed as it's a fire hazard to have an exposed oiled filter in the engine bay. This is also a rule that affects some OTRCAI's as they have an exposed oiled panel filter.

2. Hot air in your engine bay is sucked in by the POD filter and decreased performace, thus you want to enclose it in a way that it will be sucking air from outside the engine bay to optimize the engines performance.

So it's in your best interests on 2 fronts to have it enclosed.

[2005vzute]

i see i see...i've heard it's koz of safety and things but i was like hmm, what could go wrong...doubt it could suck your hand up n stuff haha..well that clears that up...im satisfied
cheers everyone

[Blown V6 Hatch]

1. Because MOST pod filters are washable oiled filters, they need to be enclosed as it's a fire hazard to have an exposed oiled filter in the engine bay. This is also a rule that affects some OTRCAI's as they have an exposed oiled panel filter.

What a load of shit (not what your saying, the rule itself) what about a carbied car with an exposed air filter? Whats the difference?

[Reaper]

What a load of shit (not what your saying, the rule itself) what about a carbied car with an exposed air filter? Whats the difference?

Phlease! surely you know by now not to let common sense get in the way of regulation.

Reaper

[Blown V6 Hatch]

Phlease! surely you know by now not to let common sense get in the way of regulation.

Reaper

Yeh, you're right...Silly me

For the record, i've been running a pod filter with no enclosure for about 3 years on my supercharged 6, never had any dramas. Also, the inlet temp doesn't read any higher with the pod than it did with an OTRCAI....

[soop]

Its just something else to fine people for.

[wraith]

I was trying so hard not to say it but I want proof on a dyno that there's any difference between an enclosed and non enclosed pod. The ambient heat in the intake manifold alone is enough to cancel out any effect an enclosed pod may have.

[Jesterarts]

What a load of shit (not what your saying, the rule itself) what about a carbied car with an exposed air filter? Whats the difference?

Pfft, buggered if I know, I don't make the rules...

As Reaper said, since when do laws or legislations have to make sense? They have to make money not sense!

[Jesterarts]

I was trying so hard not to say it but I want proof on a dyno that there's any difference between an enclosed and non enclosed pod. The ambient heat in the intake manifold alone is enough to cancel out any effect an enclosed pod may have.

Heat transfer my good man.

The intake manifold may be hot, but the air is not exposed long enough to it to influence the air temperature much.

Plus, if there is minimal heat transfer to the air, it's better to start with cooler air from outside the engine bay that hot air from inside the engine bay.

Having said all that, in the case of most cars I can't imagine there is all that much difference in power to be gained enclosing.

[wraith]

Yeah most of the time it's done only to keep the fuzz happy. It's the most ridiculous law considering from one officer to the next there definition changes. In QLD the pod has to only be secure and not move. Some think it has to be in a box. Just not worth the hassle. Mind you I have an SRI I fitted with an offcut from a mates intake pipe that I have chucked a pod on the end of. The amount of induction noise now is insane plus the throttle response is so much better then stock box with K&N.

[sleepa]

I just typed up a story and my router dropped out and lost it all ]

So, Long story short, I ran my turbo 180sx with an unenclosed filter for 6 years, most of the time it was fine but I would get more response and higher boost on cool nights. Driving back from Melbourne one 40 something day it lost all boost pressure as the computer thought the intake air was too hot for it to run without detonation. (this is running 98 octane fuel too). Pulled over, poured cool water over radiator and air filter and the amount of steam coming of the filter element.

Anyway, next half an hour was fine.

On a N/A car this probably wouldn't happen, but that is kinda proof that with an enclosed filter the air is cooler. Remember that the exhaust causes a shitload of heat in the engine bay too.

I would fully enclose a pod filter with a box made out of either plastic of aluminum with insulated wrap around it, and a nice 3 inch pipe direct to the front of the car.

[ari666]

pish posh. pods create more induction noise than an enclosed box. whats all this silly-ness about fire?!?!