Catless Front Pipe VS Test Front Pipe. What's the Difference?

[GotBRZ1691]

I work in construction safety and have access to a dosimeter. I plan to start recording sound levels of twins with different exhaust set ups. Using the same device with the same testing metrics would lead to good comparison results.

Someday soon I will start this with the Norcal crew.

[geruta]

Originally Posted by GotBRZ1691

I work in construction safety and have access to a dosimeter. I plan to start recording sound levels of twins with different exhaust set ups. Using the same device with the same testing metrics would lead to good comparison results.

Someday soon I will start this with the Norcal crew.

This would be very much appreciated if you did. A lot of people could benefit from this. Knowing what to buy when you want a loud setup, soft setup, or somewhere in between could really help save people money and frustrations from buying/installing and getting unwanted results.

[ayetothejay]

Originally Posted by geruta

I have a greddy axel back and I really like the looks and sounds of it. Its fairly quiet so I think if i went and installed a catless FP it would make it louder and not be over bearing.

Considering that the mid pipe has been said to not make a difference if any, in terms of HP or loudness of exhaust, I figured I just leave that stock.

Here's a clip of stock headers/stock op/catless fp(tanabe)/stock mp/greddy sp elite axleback. I'm actually going to run the exact same setup after I find the time to install my front pipe.

[ame]http://youtu.be/N29VYoETkCM[/ame]

[RobertPaulson]

Originally Posted by chas3wba0

Since we're on the topic of catted vs catless...

Catless front pipe:

Catted:

The difference is rasp.

was your catless front pipe resonated?

[chas3wba0]

Originally Posted by RobertPaulson

was your catless front pipe resonated?

Negative, t'was a straight pipe from Perrin

[RobertPaulson]

Originally Posted by chas3wba0

Negative, t'was a straight pipe from Perrin

ah, yeah a resonator would have killed the rasp, I'm completely catless with a resonated ark front pipe and the resonated perrin and i have very little rasp except on cold starts and right around 6k rpm. but i can only hear it if driving next to another car or a wall. otherwise 0 raps gets into the cabin.

[chas3wba0]

Originally Posted by RobertPaulson

ah, yeah a resonator would have killed the rasp, I'm completely catless with a resonated ark front pipe and the resonated perrin and i have very little rasp except on cold starts and right around 6k rpm. but i can only hear it if driving next to another car or a wall. otherwise 0 raps gets into the cabin.

I actually thought catless sounded great from inside the cabin. It was only from the video and from having someone else drive my car around that I heard the rasp T__T