Nissan 370Z Forum - Rasp on exhaust where does it come from..

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- - Rasp on exhaust where does it come from.. (http://www.the370z.com/intake-exhaust/34778-rasp-exhaust-where-does-come.html)

CATCHINZZZS

04-14-2011 03:55 PM

Rasp on exhaust where does it come from..

Wanted to know where the rasp comes from. noticed more after I installed my Invidia Pipes dont get me wrong they sound great . was just wonderin if its the muffler or heatsheilds underneath the car. or mainly the VQ itself. Need some input. Thinkin of some custom stuff without buyin a catback..

Dembflyr

04-14-2011 04:01 PM

11 to 1 compression ratio is the reason.

CATCHINZZZS

04-15-2011 09:38 PM

Can i get a better response not sayin much

theDreamer

04-15-2011 10:06 PM

It has to do with how our exhaust resonates & the straighter the pipe.
Almost all cars the straighter the pipes the more rasp and/or drone you will have.

Red__Zed

04-15-2011 11:04 PM

It's a function of a combustion engine.

Motordyne

04-15-2011 11:26 PM

Its continually reflecting shockwaves that bounce back and forth inside the exhaust tubes. Shockwaves generated by bluff bodies, sudden expansions or contractions.

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