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Re: interesting discovery



What you're hearing is ignition noise.  Each time a spark plug fires, 
some of the energy is being emitted and picked up by your radio.  It has 
nothing to do with your muffler.  AM radio is susceptible to receiving 
impulse noise.

When was the last time you listened to AM radio?

- -rb

jimmy ray <p1atinum@domain.elided> wrote:
> when i was driving the other day in my 95 325i, with b&b triflow
> exhaust, i was switching from my tape to my cd changer, and skipped
> across AM on the radio and i noticed that it had a similar tone of
> static as my exhaust, so i left it on AM (while it was staticy) and
> interestingly enough the static sounds coming from the AM of the
> radio is synchronized with my exhaust/rpm!! as i step on the gas,
> the engine/exhaust get louder and the static pitch gets higher, and
> as i let go of the gas, it gets lower. i flipped around to get other
> stations and found that not all of the non-working AM stations work,
> and they all have different tones.
> 
> now, i have only b&b triflow exhaust on my 95 325i with no other
> engine mods, has this happened to others? or am i just finally
> discovering something that has been known for ages??
> 
> and it shouldn't be something that i worry about right??


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