Berk HFCs on Factory Nismo Exhaust *RASP*

QVu

Hey all,

First bolt-on on my nismo is the Berk HFCs and wondering if anyone has put this on their nismos with the factory exhaust. Reason I'm asking is that I am experiencing quite a bit of rasp under hard acceleration/revving and wondering if others have experienced this. Berk said that this is expected, no break-in period ; is it something ill just have to get used to? What are your experiences?

Thanks,

chops

i have rasp with the nismo factory exhaust and ERZ HFC's. the below is a video..it doesnt really capture the deepness of the exhaust thats awesome, but more so the rasp and decelleration hiss that i hate. from what ive posted elsewhere...

from 0-25 seconds, its a slow rev up until about 5-6k rpm. at 26 seconds or so im just jamming the throttle to the floor...the rattling (rasp) is very noticeable!

YouTube - IMG 0347

QVu

That is exactly how my car sounds!
My biggest pet peeve is to sound like a tin can driving down the road.

The rasp does diminish as the car warms up but I still notice it.

Are you just living with it? What are your plans?

chops

from what everyone on the boards has told me...the rasp does diminish once they "break in". itll become less noticeable as the miles rack up. im at about 2-300 miles since ive installed them, and they are less raspy, but i still do get that annoying sound on hard acceleration. im hoping it goes away within the next thousand miles.

others on the boards have told me to give it a month or so before i come to any hard conclusion on removing them as they have said their rasp has nearly disappeared. we'll see as time goes.. otherwise it sounds soooo nice

QVu

Yea ill give it some time as well before i make the decision to remove em. I definitely like the sound other than the rasp...Thanks for your input! Appreciate it!.

BennytheBlade

Ive got berk hfc w the nismo exhaust and g3 intakes and no rasp.
Don't know what it's like w/o the intakes.

__________________
Forged Specialties SC 6 Bronze 19x9.5 +22 19x10.5+12|Hankook Evo 255/35/19 305/30/19
Berk HFC | BM Short Shifter |Stillen G3 Intake

QVu

Thats so strange, then how is my install of the hfc different? Arg!

fonismo

have you ever had any problems with the nismo running hot since installing the gen3 intakes? are you satisfied with the perfomance of the intake? is it worth the money?

Nu2Nizmo's

I'm just as lucky as you. Only slight hiss I hear is when vehicle is cold during low rpm acceleration. When car warms up I hear nothing. As I accelerate only noise heard is a large amount of air rushing through the intake just like Fuct stated. No loud rattling Or rasp noise like mention by most here. I'm gonna keep my fingers crossed since I only have about 300 miles since the HFC installed. So far, love the low growling as I'm cruising down the highway.

__________________
09' PW Z34 NISMO #0432Current: F5 SR Intakes - Berk HFC - H&R 15mm Spacers - 265/305 BS RE-11's - Swift Spec R's
Next mods: Oil cooler - Big Brake kit - Osiris w/dyno

conquistador

I found this sound clip and thought of this thread. I'm currently very satisfied with the way my exhaust sounds except for the slight tinny rasp at 2500 to 3500 rpm.

https://www.youtube.com/watch?v=TVcOclU9UcA

antfd3s

Chops, I just listened to this clip and my nismo USED to make the same noise after I installed res tp from GTM. At first I thought it was coming from the tps but wasn't. When it was up on the lift we heard the noise coming from the h pipe. Like something was inside there. (Like a babies rattle) Just right around 3gish hold the gas pedal. The noise is steady even on deceleration around the same rpm. We all couldnt figure out why.Maybe because it has no back pressure and NISMO h pipe is only 2" - 2 1/8" But I came up with a cure. We removed the h pipe configuration and my guy build a 2.5 X pipe CB. The noise went away completely. Freed up power and sounds throaty. Im thinking you guys both have the factory Nismo cb with your tps and that's where your noise is coming from. Hope this info helps.

chops

interesting...any pics of said X-pipe? i wish there was a nismo compatible X-pipe. id rather not get rid of the entire nismo exhaust

antfd3s

You dont have to. Heres 2 1/2 piping w X pipe. Replacing Oem 2'' H pipe. Stiil keeping the Nismo muffler and resonators. Sorry for the delay. I mainly got this done because of the lack sound,restriction and budget. Also because of the rattling noise @ 3 grand Rpm. That was really annoying. Paid less then half of a full CB and satisfyed for now.





Factory Nismo H pipe


Nismo H pipe flange 2"


Nismo Flex pipe flange 2 1/8 "

Nikkolai

Can you please post sound clips of your setup with said X-pipe?

Nu2Nizmo's

Just listened to ur sound clip and yeah that is awful. If mines made that noise then I would be annoyed too.. I hope it goes away soon for you...

__________________
09' PW Z34 NISMO #0432Current: F5 SR Intakes - Berk HFC - H&R 15mm Spacers - 265/305 BS RE-11's - Swift Spec R's
Next mods: Oil cooler - Big Brake kit - Osiris w/dyno