induction noise

CVH and Zetec tuning, suspension and braking mods.

induction noise

Postby 5tur4t on Thu Oct 31, 2002 2:52 am

okay, i've heard that inducation kits make a nice sound.

can anyone explain WHY? im intreaged! and also, is there a way to replicate that noise without an induction kits, i've heard drilling holes in the air filter box works... but not sure where to drill the holes, or why it works.

anyone shed any light on this subject for me?

cheerz :D
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Postby bassboy on Thu Oct 31, 2002 11:01 am

its makes that noise because the air filter has not got a surround to it...it just simply sucks in all of the air around it...the reason the standard air box doesnt make this sound is becuase it is enclosed and the air being drawn into the engine is from the small feed pipe.

when drilling the air box...i think u have to do it on the bottom half??but aint too sure...the air still has to pass through the filter so do it before it :lol: and yes u'll get a nice roar from doing this also...might not be as loud as the induction kit but will sound nice

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Postby TomFiesta on Thu Oct 31, 2002 12:37 pm

I think thats the general idea.
If you are gonna drill your box you do it on the bottom, otherwise water and $hit get in!
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Postby moulder on Thu Oct 31, 2002 5:37 pm

Also get a k and N panel filter as they have a better flow rate than your standard paper one, and can be cleaned and then re used. Ths should help the engine breath better. The induction kit makes more noise as the manufactures design the statndard air box to be quiet by having a small inlet so there is less sucking noise. Induction kits though are better but they let hot air in as there is no heat shield like with an air box. Also whaen it rains etc ur sucking in water. :D
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Postby mupster on Thu Oct 31, 2002 5:58 pm

Yeah you need to drill the air box under the filter and as far away from the engine as possible. You only want cold air getting into that box. Warm air will actually decrease the performance of your car.

But to save pissing around and damaging your air box your might as well just get a KnN they are only about 60 - 70 quid tops. You can then remove the air box totally and save it incase you need it when you sell your car or something.

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Postby 5tur4t on Thu Oct 31, 2002 6:46 pm

i was gonna give it a go because i was curious, and if i do i'll get a spare filter box from a scrappy incase all goes wrong, lol. Just wanted to see what it sounds like.

i've taken a pic of the box, and put black dots on where i thought you need to drill the holes, is that where they go or not?
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Postby snake on Thu Oct 31, 2002 7:35 pm

lol, if u want a loud noise at full throttle from it remove the air feed pipe :wink: it acts as a silencer, i made another pipe to come off this to feed it cold air back in the old days, lolol :rolleyes: :D :P ..

urm u wanna sort the coolant out if u aint already :oooh: , bit of corrosion goin on in their, lol
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Postby moulder on Thu Oct 31, 2002 7:50 pm

If u just want to know what it sounds lie then remove the air box and take it for a quick lap. But dopnt drive it like this all the time for obvious reasons. :D
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Postby 5tur4t on Fri Nov 01, 2002 2:21 am

i dunno how to sort it out, any way to drain it?
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Postby Phil Si on Fri Nov 01, 2002 3:14 am

take the plug out :)
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Postby snake on Fri Nov 01, 2002 3:17 am

LMFAO@phil :lol:


urm needs a bit more than draining by the looks of it though, lol needs flushing..
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Postby JamieFRST on Fri Nov 01, 2002 3:19 am

Phil Si :take the plug out :)


:lol: :lol:
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Postby 5tur4t on Sat Nov 02, 2002 4:57 am

i took off the air feed pipe and holy f**k did it make a difference!

just thinking about now how much more noise and how much better it'll be with a real induction kit... can u get 'em for the 1.1?
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Postby NikFRST on Sun Nov 03, 2002 6:48 pm

If it's a carb jobbie, just take the filter out. More power, more noise :)
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Postby 5tur4t on Sun Nov 03, 2002 7:36 pm

what and get water and bugs in the engine.... nah :lol:
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Postby NikFRST on Sun Nov 03, 2002 11:32 pm

I did it with quite a few of my old carb cars and never had a problem. You could put some kind of mesh over the inlet so you would still get the noise but won't stop water, but let's face it what's the likelyhood of getting water into your engine, unless you drive through lakes, etc. ;)
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Postby 5tur4t on Mon Nov 04, 2002 2:17 am

i drive through big puddles is that enough? :lol:

i did think about the mesh idea though... having no air filter... would that fail an MOT?
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Postby alwaysmods2do on Mon Nov 04, 2002 9:50 pm

what part is the air feed?

im thinkin about doin the same to mine
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Postby 5tur4t on Tue Nov 05, 2002 2:46 am

scroll up and look at the pic, it's the long plastic "squarish" tube that goes out of the pic from the main part of the air box, if you take it off it makes it sound more sporty when u put ur boot down
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Postby Andy Si on Tue Nov 05, 2002 8:42 am

snake :urm u wanna sort the coolant out if u aint already :oooh: , bit of corrosion goin on in their, lol


Trust you to notice that :D :P
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Postby alwaysmods2do on Tue Nov 05, 2002 10:20 am

is it OK to drive it all the time without the air feed attached?
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Postby 5tur4t on Tue Nov 05, 2002 1:52 pm

yes
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Postby alwaysmods2do on Tue Nov 05, 2002 7:33 pm

i drilled some holes in the back of my air box,

it sounds really deep but quite throaty, is that normal?

sounds quite cool though, just don't hear it as much when rev's are high!

[ERRR] i drill more holes on the filter?, will it make it louder?!
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Postby alwaysmods2do on Tue Nov 05, 2002 8:02 pm

i tried that air feed thing, but couldn't work out how to detach the baxtered from the main section of the air box!

advice please!
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Postby 5tur4t on Tue Nov 05, 2002 8:07 pm

its two peices clipped together, pull them apart at the end, and pull it up so it comes out a bit where it clips in, then just wriggle the bottom half of the pipe out and it all comes out, not the best explination in the world but hey, im tired. it does work though.
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