My mechanic's thoughts on the Berk CBE & HFC

MaDMaXX · 03-01-2012, 03:12 PM

In for the lols

A lot of mechanics identify cats by looking for the heat shielding, if a factory exhaust has bracing or just heat shielding for the heck of it, they usually yell cat!!

Red__Zed · 03-01-2012, 03:28 PM

Quote:

Originally Posted by MaDMaXX

In for the lols

A lot of mechanics identify cats by looking for the heat shielding, if a factory exhaust has bracing or just heat shielding for the heck of it, they usually yell cat!!

Which helps us all out when it is time for an inspection

Shadax · 03-01-2012, 03:36 PM

Just picked up the car. He said everything went smooth, and it does sound really good.

Only thing is I can *definitely* hear air coming from where the cats are. At high RPMs on the road it's noticeable, and when I have the car stationary with the door open during revs. Should I be able to?

For example if I give it a nice rev up to 4k while in neutral, on the release I'll hear air from the front-middle of the under carriage.

I was a bit concerned at first, but I wasn't sure if it was because I'm not used to it, or something isn't right.

kielbasa16 · 03-01-2012, 03:43 PM

Quote:

Originally Posted by Shadax

Just picked up the car. He said everything went smooth, and it does sound really good.

Only thing is I can *definitely* hear air coming from where the cats are. At high RPMs on the road it's noticeable, and when I have the car stationary with the door open during revs. Should I be able to?

For example if I give it a nice rev up to 4k while in neutral, on the release I'll hear air from the front-middle of the under carriage.

I was a bit concerned at first, but I wasn't sure if it was because I'm not used to it, or something isn't right.

If its a hiss on deceleration, when you let go of the gas, then this is perfectly normal. Modifying any component of the 370Z exhaust has this effect, particularly the cats. If you hear it when revving up, when accelerating then you could have a leak.

Shadax · 03-01-2012, 03:52 PM

Quote:

Originally Posted by kielbasa16

If its a hiss on deceleration, when you let go of the gas, then this is perfectly normal. Modifying any component of the 370Z exhaust has this effect, particularly the cats. If you hear it when revving up, when accelerating then you could have a leak.

Huh. I think I actually do hear it when accelerating.

How can I absolutely determine if there's a leak and how is it typically rectified?

Thanks for this info!

Quote:

Originally Posted by Alchemy

You will hear a hissing sound at low RPM. TOTALLY NORMAL. My test pipes hiss like a mo-fo! Esp around 2k

Do you hear the hiss when accelerating too?

Alchemy · 03-01-2012, 03:55 PM

Quote:

Originally Posted by Shadax

Huh. I think I actually do hear it when accelerating.

How can I absolutely determine if there's a leak and how is it typically rectified?

Thanks for this info!

Do you hear the hiss when accelerating too?

No acceleration hiss

Alchemy · 03-01-2012, 03:45 PM

Quote:

Originally Posted by Shadax

Just picked up the car. He said everything went smooth, and it does sound really good.

Only thing is I can *definitely* hear air coming from where the cats are. At high RPMs on the road it's noticeable, and when I have the car stationary with the door open during revs. Should I be able to?

For example if I give it a nice rev up to 4k while in neutral, on the release I'll hear air from the front-middle of the under carriage.

I was a bit concerned at first, but I wasn't sure if it was because I'm not used to it, or something isn't right.

You will hear a hissing sound at low RPM. TOTALLY NORMAL. My test pipes hiss like a mo-fo! Esp around 2k

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03-01-2012, 03:12 PM	#1 (permalink)
MaDMaXX Enthusiast Member Join Date: Jan 2012 Location: Oregon from England Posts: 292 Drives: 350z Rep Power: 15	In for the lols A lot of mechanics identify cats by looking for the heat shielding, if a factory exhaust has bracing or just heat shielding for the heck of it, they usually yell cat!!

03-01-2012, 03:36 PM	#3 (permalink)
Shadax Base Member Join Date: Mar 2011 Location: Camarillo, CA Posts: 64 Drives: 2010 370z 6MT Rep Power: 16	Just picked up the car. He said everything went smooth, and it does sound really good. Only thing is I can definitely hear air coming from where the cats are. At high RPMs on the road it's noticeable, and when I have the car stationary with the door open during revs. Should I be able to? For example if I give it a nice rev up to 4k while in neutral, on the release I'll hear air from the front-middle of the under carriage. I was a bit concerned at first, but I wasn't sure if it was because I'm not used to it, or something isn't right.