Just received the new Ark Type 2 Grip True Dual exhaust

TeamARK · 02-19-2010, 03:23 PM

First off, We would like to apologize for the shipping dates. To coordinate the g37. 370z, and Genesis system from Korea wasn't easy and we still didnt get all the shipments yet. However, we will do a better job to keep the community updated with dates and such.

We did some research on the Hissing noise. We are testing out some solutions to this. For one, let me just say that the exhaust by itself does not make this noise. If you ever put your oem cat back on you will be able to hear its true tone.

we believe that the sound is generated from the flanges that meet at the HFC and headers. The sizes of these two pipes are different and by looking at some HFC's they do not taper down, but instead create a step between the two piping sizes.

Note: TONYBPD, tracking # will be in mailbox by this afternoon.

CrownR426 · 02-19-2010, 06:24 PM

Quote:

Originally Posted by TeamARK

First off, We would like to apologize for the shipping dates. To coordinate the g37. 370z, and Genesis system from Korea wasn't easy and we still didnt get all the shipments yet. However, we will do a better job to keep the community updated with dates and such.

We did some research on the Hissing noise. We are testing out some solutions to this. For one, let me just say that the exhaust by itself does not make this noise. If you ever put your oem cat back on you will be able to hear its true tone.

we believe that the sound is generated from the flanges that meet at the HFC and headers. The sizes of these two pipes are different and by looking at some HFC's they do not taper down, but instead create a step between the two piping sizes.

Note: TONYBPD, tracking # will be in mailbox by this afternoon.

Will Ark also be producing HFC/Headers?
If not, which companies have you been testing with?

DannyGT · 02-19-2010, 08:24 PM

Quote:

Originally Posted by TeamARK

we believe that the sound is generated from the flanges that meet at the HFC and headers. The sizes of these two pipes are different and by looking at some HFC's they do not taper down, but instead create a step between the two piping sizes.

I would like to *think* I'm a pro now since I have been down this road and hacked my exhaust to death just to try and eliminate that sound.

There only seems to be a couple of ways of eliminating that rasp...From some old sources I have heard from in G37's etc etc - going 'true' dual seems to stop the rasp. But of course, we all know it makes less power.

The other way that seems to work is when you place resonators before the H/X setup - think Invidia Gemini - which is where I have verified the dreaded sound is at its worse. I was planning on adding some resonators at that spot but I haven’t done anything because I wanted to wait for a SC/TT kit so I can make the needed changes to the exhaust at that point.

Additionally - I want to point out that the GTM Res test pipes I have definitely killed alot of the rasp but it’s still there for a brief second around 2500rpms. Instead of hearing it from 2-4kish and all throughout decel it only quickly 'pings' around 2500 and quickly goes away and almost zero on deceleration. So, I was happy with the improvement but I've always been bugged by it.

Zeto · 02-19-2010, 09:04 PM

Quote:

Originally Posted by DannyGT

I would like to *think* I'm a pro now since I have been down this road and hacked my exhaust to death just to try and eliminate that sound.

Definitely the expert

TeamARK · 02-19-2010, 09:37 PM

This is what every exhaust is to look like. Slightly angled.

We had all the 370z exhausts test fitted on to our test car and placed on a Jig to confirm that it is fitted the way its suppose to. Our flanged is bolted down and aligned perfectly.

Alex

Daishi · 02-20-2010, 10:52 AM

Quote:

Originally Posted by TeamARK

First off, We would like to apologize for the shipping dates. To coordinate the g37. 370z, and Genesis system from Korea wasn't easy and we still didnt get all the shipments yet. However, we will do a better job to keep the community updated with dates and such.

We did some research on the Hissing noise. We are testing out some solutions to this. For one, let me just say that the exhaust by itself does not make this noise. If you ever put your oem cat back on you will be able to hear its true tone.

we believe that the sound is generated from the flanges that meet at the HFC and headers. The sizes of these two pipes are different and by looking at some HFC's they do not taper down, but instead create a step between the two piping sizes.

Note: TONYBPD, tracking # will be in mailbox by this afternoon.

Dont think the flanges are the problem. Even people with aftermarket headers are getting the hissing.

TonyBPD · 02-20-2010, 12:49 PM

Quote:

Originally Posted by TeamARK

First off, We would like to apologize for the shipping dates. To coordinate the g37. 370z, and Genesis system from Korea wasn't easy and we still didnt get all the shipments yet. However, we will do a better job to keep the community updated with dates and such.

We did some research on the Hissing noise. We are testing out some solutions to this. For one, let me just say that the exhaust by itself does not make this noise. If you ever put your oem cat back on you will be able to hear its true tone.

we believe that the sound is generated from the flanges that meet at the HFC and headers. The sizes of these two pipes are different and by looking at some HFC's they do not taper down, but instead create a step between the two piping sizes.

Note: TONYBPD, tracking # will be in mailbox by this afternoon.

CrownR426 · 02-20-2010, 02:23 PM

Quote:

Originally Posted by TonyBPD

lol...
It's okay Tony, you're not the only one...

ERZperformance · 02-25-2010, 05:33 AM

Quote:

Originally Posted by TeamARK

First off, We would like to apologize for the shipping dates. To coordinate the g37. 370z, and Genesis system from Korea wasn't easy and we still didnt get all the shipments yet. However, we will do a better job to keep the community updated with dates and such.

We did some research on the Hissing noise. We are testing out some solutions to this. For one, let me just say that the exhaust by itself does not make this noise. If you ever put your oem cat back on you will be able to hear its true tone.

we believe that the sound is generated from the flanges that meet at the HFC and headers. The sizes of these two pipes are different and by looking at some HFC's they do not taper down, but instead create a step between the two piping sizes.

Note: TONYBPD, tracking # will be in mailbox by this afternoon.

Great exhaust, Alex and Ted at ARK know what they are doing.

02-19-2010, 03:23 PM	#1 (permalink)
TeamARK Track Member Join Date: Jul 2009 Location: CHINO Posts: 957 Drives: Black 350z/370z Rep Power: 18	First off, We would like to apologize for the shipping dates. To coordinate the g37. 370z, and Genesis system from Korea wasn't easy and we still didnt get all the shipments yet. However, we will do a better job to keep the community updated with dates and such. We did some research on the Hissing noise. We are testing out some solutions to this. For one, let me just say that the exhaust by itself does not make this noise. If you ever put your oem cat back on you will be able to hear its true tone. we believe that the sound is generated from the flanges that meet at the HFC and headers. The sizes of these two pipes are different and by looking at some HFC's they do not taper down, but instead create a step between the two piping sizes. Note: TONYBPD, tracking # will be in mailbox by this afternoon. Last edited by TeamARK; 02-19-2010 at 03:33 PM.

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02-19-2010, 09:37 PM	#5 (permalink)
TeamARK Track Member Join Date: Jul 2009 Location: CHINO Posts: 957 Drives: Black 350z/370z Rep Power: 18	This is what every exhaust is to look like. Slightly angled. We had all the 370z exhausts test fitted on to our test car and placed on a Jig to confirm that it is fitted the way its suppose to. Our flanged is bolted down and aligned perfectly. Alex