Berk HFCs on Factory Nismo Exhaust *RASP*

QVu

I guess ill have to take the video from where the rasp is coming from, the cats. The stock cat didn't make this sounds at all. Its horribly annoying especially when the engine is still cold. From the cabin it sounds like im one of those ricers with pep boys fart cans lol.

wishihadnav

yeah it does hiss a little...no rasp however..

QVu

This is a better idea of the rasp im hearing:

YouTube - RASP

chops

yup, thats the exact same rasp that i get.

QVu

Has the rasp gotten any quieter since you got it?

Turfgod

Did you try resetting your ecu? To me at the end it sounded like a slight backfire during hard deacceleration. I did not hear it during accelaration only during deaccel.

Troy

QVu

yea im assuming the ecu got reset, the battery was disconnected throughout the installation process.

christian370z

Did you go to SpecialtyZ by chance? The last time I heard a Berk HFC/Nismo CBE combo, it sounded great and was still the traditional deep Nismo sound. I have to admit Berk HFCs and a stock cat-back exhaust is a bit raspy at times but it all depends on your preference.

There always could be a small leak somewhere,but other than that I am not sure what could cause that much rasp.

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-320whp / 259wftlbs-
SP Rays -- RE-11s -- SpecialtyZ Tune -- Swift Springs -- Stillen 25R Oil Cooler -- Stillen G3 Intakes -- Berk HFCs -- F.I. 12" CBE -- Stillen Sway Bars -- Es14 Spring -- INGS+1 lip -- CF Spoiler -- GTR Start Button -- VLED Parking Lights -- PWJDM V2 shift knob

QVu

Yea I went to specialtyZ, I just dont know how it could be so raspy!

QVu

Not knockin on Specialtyz by any means of course. They are awesome.

christian370z

Yeah, Seb mentioned you weren't a fan of the additional rasp when I was in there on Wednesday. Apart from the rasp, does it sound good under load?

__________________
-320whp / 259wftlbs-
SP Rays -- RE-11s -- SpecialtyZ Tune -- Swift Springs -- Stillen 25R Oil Cooler -- Stillen G3 Intakes -- Berk HFCs -- F.I. 12" CBE -- Stillen Sway Bars -- Es14 Spring -- INGS+1 lip -- CF Spoiler -- GTR Start Button -- VLED Parking Lights -- PWJDM V2 shift knob

QVu

Hehe what a coincidence.

Yea i love the sound at all rpms, but i tune into the annoying rasp too much. just kills it for me.

chops

i agree...even though its 50 degrees outside (COLD for us californian's) i roll down the windows pretty often and listen to the exhaust rumble. it sounds so great except for that range between 3k-ish where the rasp is. its pretty nasty sounding when you're doing a high RPM downshift too

QVu

Yea I do love it once the engine is warm. I went to Seb at SpecialtyZ again yesterday and he said this is normal, and the rasp really varies between cars even though their setups may seem the same. I truly hope it does get quieter over time. The time from now until I scrape enough money to go FI. hehe.

tjlazer

That is not bad at all and hardly should be of a concern. Sounds great IMHO. Make sure the O2 sensor bungs are tight, could be a small rattle.

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2009 370Z Monterey Blue,Nismo Conversion,RE-11's, K&N Typhoon intakes,Blue Kickplates,Homelink,FI 18" CBE,ERZ HFCs,Hotchkis sways, Swift Spec-R, EVO-R Highwing, UPREV