Least rasp, deepest CBE paired with PPE LTH?
 

I just installed my ppe headers and I already had the stillen CBE system on. The final outcome is great when it comes to power but the sound on the other hand is a little to raspy for me. I'm wondering if any of you guys out there that have ppe Lth can possibly give me some suggestions on which way to go to get rid of the rasp? If it need be a whole new CBE so be it or maybe a resonated y pipe? I'm not sure but any sound clips of what you guys have paired on your z's or anything like that would be awesome!! Thank you for your time and for any help you can give me.

Maybe a FI exhaust with 18" resonators. I'm sure someone has that setup

I use the Motordgne XYZ Y pipe with my PPE's. I also have a HFC and resonator module to use with the Y pipe. With the Tanabe exhaust and hfc installed, there is no rasp once warmed up. There is a hint when the pipes are cold. I just posted videos earlier today in my journal. My last couple posts were vids. Yours of course won't sound 100% like mine but it should be a good idea.

Thank you guys for the input. Firehawk, where would I be able to get a hfc w/ resonator module? Also would the xyz pipe bolt right up with my stillen?

I believe it should. When you buy the Motordgne XYZ Y pipe, you have the option to purchase a resonated, catted or straight pipe piece. Each will be priced relative to the option you pick.

http://m.youtube.com/watch?v=h8X84XJ...%3Dh8X84XJtHso

This is my old setup PPE with aam

This sounds pretty good I must say. :tiphat:

Thank you:) but i have turbos now but with the same exhaust.

Just get resonators. FI uses Vibrant made in china ones. The 15's or 18's will be fine.

I think it's funny that you point out that the Vibrant resonators that FI uses are made in China every chance you get.

They're an American company selling china parts. They work but before I tell someone to install something I'm going to let them know the origin of manufacture. If they're good enough for FI then I'm sure they're good enough for the OP. But if they fail, rust, whatever, I don't want them blaming the Americans...blame the cheap china steel that doesn't have the exact same metallurgy as USA.

I was thinking about welding in hfc into my y pipe? Whatdu guys think about that? Kindve like the xyz pipe from motordyne.

That'd work fine. I wouldn't want to loose power though and cats cost a lot. Resonators will delete rasp, some noise, and won't hurt power and cost next to nothing.

Yeah I guess I'll try resonators out. Thank you syno

Motordyne measured the power loss of the HFC to the resonators at 2-3 whp. I haven't seen the dyno differences. I would measure the diff with mine but superharging changes things. The HFC is notably more expensive like Syno said. Well you have the option to DIY or BUY

Bump

Did the ppe have a 3 star scavenger thing in the collector like FI?

I don't have ppe but my setup is crazy raspy even with 18" resonators. Looks like 12" ones at the lth connection are in my future. Or Helmholtz resonator or side branch resonators. Although those are more for drone I believe.

The merge collector (header in general) is much nicer than F.I's, but I don't have a pic to show of the inside of the merge collector.

Here is a link of mine This is with The PPE's, Tanabe and MD Y pipe/HFC. After really listening into the video I hear just a hint of rasp, but I can't hear it at all driving. Pipes may have not been warmed up in this vid.
GTM Twin Supercharged 370Z Exhaust - YouTube

The one below is windows down with a my cell phone
Twin supercharged 370Z acceleration - YouTube

With the hfc I'm sure you don't have rasp. Plus isn't the setup not a true dual? I forget.

Y pipe, I was under the assumption having an X or H pipe helps a bit with rasp, could be wrong

Id think the opposite since its more volume to fill and bounce off of stuff. I just hope again resonator kill it.

Least rasp, deepest CBE paired with PPE LTH?
 

I currently have the stillen CBE system and it's pretty raspy I can't stand driving around sounding like a rice burner lol. So I'm willing to do whatever it takes to make my car sound clean and deep again. Do you guys have any suggestions of good pairs?

Btw my exhaust only got raspy after I installed the headers obviously.

Why did you make another thread for the exact same thing? Go buy Vibrant 12" or 18" resonators and have them installed. That or buy 2 high flow cats and have them installed. You have no other option, period.

Does the stillen already have 2 resonators in the mid pipe?? If not then you need to buy 4 resonators. There's a reason some test pipe makers sell resonated test pipes.

No I don't believe it has any resonators at all.

Lol how you not know? I think it has 2

Lol I guess it does huh. Thanks for that

After reading this I don't think you should do resonators inline with the pipe. Do a Helmholtz resonator.

Tee off the Y pipe behind the flanges that bolt to the LTH and add them going straight across. Hopefully not only will your sound change but add HP too.

Nissan 350Z Motordyne ART Products - Fact Or Fiction - Import Tuner Magazine

That's an awesome idea I'm just not exactly sure how I would pull that off. Isn't there some technical specifications behind all that. Can't exactly just weld a pipe onto the y pipe and expect it to work?

Where exactly would I get something that I could even use for that?

If you wanted deep sound, headers do the opposite. Resonators do that.

Well I guess I should clarify, I just don't want the rasp lol. The sound is fine I understand that it's not going to be as deep as It was now that it's opened up more.

I did, just finished. Took the oem resonators and cut the ends just right to weld onto the x pipe. The other end is blocked off. Lost 90% of the horrible rasp and about 20-30 decibels which I'm sad about. O well it's worth it for no more rasp.

I doubt you lost 20-30 dB.

For reference, 6 dB down is half as loud as it was before. 12 dB down is half of half.

Just picking nits tho, glad it worked.

We'll I can't prove you wrong because it's fixed but I'm sticking to my guns :icon23:. I have a meter but the batteries dead at the moment. I bought it because race bike rules were at 4 feet back at a 45* angle from the exhaust tip at half throttle you couldn't be over 105db. My bike was 105-106 :tup:. Based off that I'd say my car was 100 at start up, crazy loud for a car at 2k rpm!! Now its about 80. Ill test tomorrow.

PS wife was sleeping first start up and it shook the house, scared her, and she had no idea it was my car or any car based of the type of sound and the volume. She likes it much better now.

Sounds like when I was running mine with no exhaust, just a Y-pipe after the headers, for a while there when I was waiting for my exhaust to come in.

Lol yeah that'd prob do it. I think I'm going to cut off the mufflers because they 90 degree turn twice. Thinking about doing straight pipes with 2 more Helmholtz like motordyne.

How do you guys think the motordyne system would sound with the ppe?

I'm going to remove mufflers first so maybe I can find out. Not going to be the same thing since my Helmholtz are up front and there's are in the rear but who knows.

It will be loud, Tony@Motordyne said it wouldn't rasp, it has one large X pipe resonator and J tubes in the rear.