BUILDING CAI materials.

[Okibi]

A pod filter is illegal..

In W.A. you can get a permit to mount a pod filter. They just check and make sure it's all attached securely.

[stevesports]

A pod filter is illegal, I'm not sure but I think that if your air intake is outside the engine bay it is alright. the reason a pod filter is illegal is because if your car should backfire through the filter it could cause an fire in the engine bay. I think the modern filter boxes probably have some sort of baffle system built into them to stop any such occurence. I think this baffle system could be the restriction that makes a pod filter more effective. just a thought.

not quite. A pod filter is illegal if it not enclosed in a airbox.

in addition, how would a car backfire through the intake tract? the ignition occurs when the valves on the intake side of the engine is closed so i don't understand how this would occur. In addition, if this would occur, the paper filter would catch fire anyway.

[crzymx]

What constitues as an airbox? Enclosed casing, i.e enclosed pod filter in a mani CAI system?

[grump]

the mania pod filter is enclosed in an airbox with a tube off the intake side which goes through the firewall. My old ski boat motor, 350 chev, used to backfire through the carb all the time.
You had to hit the starter to suck the flames back into the carb to put the fire out. scarry to the uninitiated, but you got used to it.

[stevesports]

the mania pod filter is enclosed in an airbox with a tube off the intake side which goes through the firewall. My old ski boat motor, 350 chev, used to backfire through the carb all the time.
You had to hit the starter to suck the flames back into the carb to put the fire out. scarry to the uninitiated, but you got used to it.

that is hardcore. What do you think causes that?

[Matty]

http://en.wikipedia.org/wiki/Back-fire

[GP]

I didn't bother with the hole thru the firewall, Not very much advantage in doing that. I did it remove the airbox restriction which Improved performance/fuel economy.

[Jeo]

A pod filter is illegal.

Legal in the ACT

[grump]

stevesports, the 350 chev was built by Billy Man here in Brisbane, was putting out 500 plus horsepower. It didn't like to idle due to cams etc. 0 to 60mph in under 4 seconds. I guess the timing wasn't set to the optimum for idle. so with no gearbox and a dog clutch when you dropped the revs to put it in drive the extra load would cause it to backfire and stall. If you kept the revs up a bit and forced it in and then put your foot down it wasn't a problem. I must add that I didn't have any air filter or air cleaner on the engine

[crzymx]

I didn't bother with the hole thru the firewall, Not very much advantage in doing that. I did it remove the airbox restriction which Improved performance/fuel economy.

Are you suggesting that the CAI is not neccessary?

[crzymx]

Whats your opinion on making one as apposed to buying one?

[GP]

Are you suggesting that the CAI is not neccessary?

I'm just saying that drawing air from in front of the windscreen gives little to no Improvement over just drawing air from under the bonnet.
I am planning on ducting air from the front of the car one day.
The abreviation CAI I find optimistic, I prefer AAI (Ambient Air Intake)

[Matty]

Are you suggesting that the CAI is not neccessary?

I'm just saying that drawing air from in front of the windscreen gives little to no Improvement over just drawing air from under the bonnet.
I am planning on ducting air from the front of the car one day.
The abreviation CAI I find optimistic, I prefer AAI (Ambient Air Intake)

Have you actually measured the intake temperatures? I have, there's a big difference using a cowl intake.

[grump]

GP i'm sure if you go back through the posts you will find evidence that proves that a cowel intake makes a noticible difference. It won't make any difference where you pick up your air from under the bonnet, it will be hotter than the air outside your bonnet. the gap between the bonnet and screen is a high pressure area , so it is a good place to pick up your air from.
My mx5 mania cai makes a noticable difference. It replaces a standard K+N pod filter picking up from under the bonnet.

[GP]

GP i'm sure if you go back through the posts you will find evidence that proves that a cowel intake makes a noticible difference. It won't make any difference where you pick up your air from under the bonnet, it will be hotter than the air outside your bonnet. the gap between the bonnet and screen is a high pressure area , so it is a good place to pick up your air from.

Let's just agree to disagree