Aftermarket cams = Noisy ??

[geo41e]

Hey there, just wondering, i heard from mates that getting cams alter the idle noise of ones engine.

is this true ? if so, how much louder/harsher ??

[SIKCVC]

depends on how agressive the cams are... but lets face it, your talking about a 4cyl not a v8 :P

[egSi]

cams do not make the engine noisier or harsher, they alter the smoothness of the idle abit.

like make it a bit lumpier, lumpy 4s sound so nice!!
i heard a gti with lumpy cams and i want cams just to get mine to sound like that! lumpy 8 sounds like arse compared to a lumpy 4.
not harsh just nice.

yeah and the lumpiness depends on how aggressive the cam profile is.
lift and duration etc.

[geo41e]

thanks dudes

[SIKCVC]

they will alter induction noise if you have a pod... perfect example... VTEC cross over.

[ML]

i changed the angle of mine and it changed the sound ov the revs after about 3000 sounds heaps better

[wynode]

angle?

[SIKCVC]

prob means timing or duration.

[ECU-MAN]

the overlap is what gives you your induction noise. I saw a 86 integra once with the valve timing set wrong. it was awsome to listen to but whent like a bucket till the revs got up.

[wynode]

You can't change duration unless you change the cam profile itself. I presume he's reffering to the timing :?:

[ECU-MAN]

You can't change duration unless you change the cam profile itself. I presume he's reffering to the timing :?:

no you cant change the duration but if the valve timming is worng you could change the overlap ie the time the intake and exhaust valves are open simaltaniously. this is a mechanicle thing and ignition timming has nuthing to do with it.. I dont recomend you do this either.