Nissan 370Z Forum - View Single Post

DannyGT · 12-31-2009, 01:18 PM

Thats actually the infamous 'rasp' you will come across on these boards...almost all cars do it and depending on the config its either louder or quieter. You will hear it on decel and more defined in that 2-4k rpm range.

Now - you can go custom or with another exhaust but from what I can tell an FI exhaust with 18" is good and that invidia gemini exhaust nearly solved the issue all together by putting the resonators right before your typical H/X connection. Thats where the 'rasp' is heard and having the resonators in that early in the exhaust pretty much eliminates it.

Trust me, i exhausted myself months and months back trying to determine what it was...You can even find a youtube video that I made where you can clearly hear the sound.

Also, I forgot to mention...it gets worse with a HFC or Test pipe (downpipes) that are the main cause of that resonance right before the mid section.

12-31-2009, 01:18 PM	#2 (permalink)
DannyGT Track Member Join Date: Jan 2009 Location: Jersey Posts: 919 Drives: 370Z (SOLD) Rep Power: 279	Thats actually the infamous 'rasp' you will come across on these boards...almost all cars do it and depending on the config its either louder or quieter. You will hear it on decel and more defined in that 2-4k rpm range. Now - you can go custom or with another exhaust but from what I can tell an FI exhaust with 18" is good and that invidia gemini exhaust nearly solved the issue all together by putting the resonators right before your typical H/X connection. Thats where the 'rasp' is heard and having the resonators in that early in the exhaust pretty much eliminates it. Trust me, i exhausted myself months and months back trying to determine what it was...You can even find a youtube video that I made where you can clearly hear the sound. Also, I forgot to mention...it gets worse with a HFC or Test pipe (downpipes) that are the main cause of that resonance right before the mid section. __________________ Performance GTM Stage 1 SC, GTM Res.Test Pipes, Invidia Gemini Exhaust, GTM HD Oil Cooler Wheels & Suspension AME Tracer TM02's 19x9.5F 19x10.5R w/ 265x35F & 305x30R, Hotchkis Sways, BC (BR) Racing Coilovers (Car Sold) Last edited by DannyGT; 12-31-2009 at 01:24 PM.