Technical Car/Motor Issues > Toyota Carina E - 95 1.6 'Mystery' box on air duct Miscellaneous
Thread Author: Diamond Replies: 9
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New Sun 20 Mar 11 21:38 
 Toyota Carina E - 95 1.6 'Mystery' box on air duct - Diamond
The large rubber pipe from the air filter to the throttle body has a plastic box attached near to the throttle body which I cannot identify. There are no wires or pipes coming from this box which is about 4 inches square. There is nothing in the Haynes manual either to say what this can be.

Any ideas what this box is for?
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New Sun 20 Mar 11 21:42 
 Toyota Carina E - 95 1.6 'Mystery' box on air duct - Zero
Its a tuned air resonator. Prevents the noise of induction roar.
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New Sun 20 Mar 11 21:44 
 Toyota Carina E - 95 1.6 'Mystery' box on air duct - Diamond
Does the air kind of swirl round in this before entering the throttle body then?
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New Sun 20 Mar 11 21:51 
 Toyota Carina E - 95 1.6 'Mystery' box on air duct - Dave_
The air in the resonator acts as a sponge to damp sound waves. It works like a bandpass speaker enclosure in reverse, I think.
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New Sun 20 Mar 11 21:51 
 Toyota Carina E - 95 1.6 'Mystery' box on air duct - Zero
Oh lord, - cant tell you what the air is doing in there, expanding, pulsing, whatever the computer design decided to reduce the noise.

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New Mon 21 Mar 11 07:02 
 Toyota Carina E - 95 1.6 'Mystery' box on air duct - MD
Cor.....I wants one of dose.
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New Mon 21 Mar 11 07:33 
 Toyota Carina E - 95 1.6 'Mystery' box on air duct - Fenlander
>>>Cor.....I wants one of dose.

No... strip it all out and replace with blue pipes... the lads say you get at least an extra 15bhp... they must be blue apparently... no other colour is as good.

sphotos.ak.fbcdn.net/hphotos-ak-ash2/hs576.ash2/149886_10150320170555714_529830713_15864874_5616072_n.jpg
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New Mon 21 Mar 11 09:02 
 Toyota Carina E - 95 1.6 'Mystery' box on air duct - Zero

>> No... strip it all out and replace with blue pipes... the lads say you get
>> at least an extra 15bhp... they must be blue apparently... no other colour is as
>> good.

Come on. Stands to reason, if it makes more noise, there must be more power.
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New Mon 21 Mar 11 14:50 
 Toyota Carina E - 95 1.6 'Mystery' box on air duct - Old Navy
>> Come on. Stands to reason, if it makes more noise, there must be more power.
>>
>>

I had a smile the other day, I was behind a BMW X5 fitted with two waste paper basket sized exhaust pipes. Of course fitted to a low powered skinny tyre version.
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New Mon 21 Mar 11 17:16 
 Toyota Carina E - 95 1.6 'Mystery' box on air duct - Number_Cruncher
The resonantor is, as mentioned above, a device to reduce inlet noise, the combination of the volume of the chamber and the size of the pipe into it combine to tune the device to work at a given frequency - its more scientific name is a Helmholtz resonator.

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