It's actually been close to 1,000 miles, but either way I see no reason to touch it yet. Honestly I'm sort of hoping to either 1. buy a different car or 2. do a huge amount of upgrades once I finish school in Dec 2019 anyways, so no reason to throw money away yet. Only thing is, I can't decide whether to sell the OEM exhaust or keep it around for now.

 

That's a tough one. If you have the space it's nice.

 

What's weird (and I'm not totally understanding) is supposedly this exhaust drones partially because I'm not producing enough power/exhaust pressure for it. would freeing up exhaust w/ high flow cats help with that?

 

It's actually caused by FRICTION on another surface, an acoustical vibration.

It's exactly the same thing when you use a crystal wine glass and run your finger across the top to make that ear piercing ringing sound. Your finger is creating friction causing the mating surface to vibrate at a certain frequency. The same can be achieved by blowing air across a beer bottle, the AIR has friction and causes the bottle to vibrate at a specific frequency which can be audibly heard.

The air travelling through your exhaust has a lot of friction on the metal pipes of the system and the muffler, this is why rapid changes in pipe size is bad, it creates points like the edge of your beer bottle that can create these acoustics. Also just like your beer bottle it takes a VERY SPECIFIC amount of air across the surfaces of the system to cause drone. Increasing the overall flow of the system increases the CHANCE of drone but because of the amount of bends in the pipe and the internal baffling of the muffler drone is all but inevitable eventually because of the wide range of exhaust flow from idle to redline. Resonators are added to break up the airflow by allowing it to basically flow back on itself at the outside edges of the flow while the center of the airflow continues on at the same speed (thus they don't restrict the exhaust).

The best analogy I can give for this is to blow across the beer bottle to make it whistle, then lift your head so the airflow doesn't QUITE blow across the bottle and the noise stops. That's basically what the resonator is doing because it's just a pipe with a bunch of tiny holes in it inside a larger enclosure.

 

So what you're saying is I need to increase the diameter of my headers and cats for consistency? :P

 

 

Oh yea I would never want test pipes, my girlfriend would never even get in the car with me lol plus the smell makes me a bit nauseous.


'm still sort-of debating between ISR , Fast intentions (non-res or res), or Ark Grip res for HFCs.

 

Exhaust manufactures spend days if not weeks testing their systems to avoid drone and increase WHP! They're always the same size diameter from header to tips where exit! No one can modify a OE exhaust and think you'll eliminate drone. You're vid doesn't sound bad and don't waste any more $$ trying to get rid of the drone you're hearing. If you plan on keeping your G I suggest you buy a used quality aftermarket exhaust from our Marketplace under private classified.
Good Luck & enjoy the ride...Gary

 

I haven't experimented with resonated/nonresonated but from the YouTube videos I've watched, resonators seem to make this exhaust lose its "exotic" note, especially in the lower rpms.

i personally felt that stock cats/stock de Y pipe/r1-t sounded the most exotic,especially in the lower rpms around 2.5-3k. But it had the most drone and could've been louder.

Funny thing is that my Z1 100 cell non resonated HFCs sounded raspy when paired up with my Megan HR y pipe 2.5-3in, but the weird thing is that when I switched it back to my stock de Y pipe, the rasp went away. Exhaust note became "exotic" again. This is my current set up and it's currently my best configuration out of 7 I've tried with stock cats/y pipe being a close second.

Anyways in regard to your decision, idk which i would chose. Maybe since you already have resonated y pipes try a non resonated HFC.
From videos, too many resonators seem to quiet the car down too much but that's just me.

 

So I definitely get a little rasp (lift-off crackles and pops) but I actually like the amount that I get, and it still sounds pretty exotic. It's also loud as fffffff haha because I got the lightweight muffler version. My circuit werks y pipe is the same (2.5 to 3 inch). A non-resonated HFC might be the way to go, and the ISR one is pretty inexpensive. The only issue is I'm worried that it will become too loud for me to use lmao.

 

I'll try to get some videos of some pulls when I get the chance, just been too busy lately

 

Not sure how going non-resonated would make it sound better, but okay. Waiting for that vid!

 

A couple tiny revs:
I hit the record button like 3 seconds earlier but my phone didn't record and my gf was too shy to keep revving it for me lol

 

Hah! Next time send her out with the phone. Maintain control at all times, my man!

 

I've found the Vibrant Ultra Quiet resonator is very effective and cutting down drone drastically. Still have a tiny bit with my set up at 2500 rpm(Art Pipes, Circuit Werks resonated Y-pipe, Tanabe exhaust with the original resonator and muffler removed and replaced with the Vibrant resonator and Dynomax Super Turbo muffler respectively) but the volume now is maybe 1/10th what it was originally. The low speed tip in light throttle boominess is gone too. Sounds much cleaner when I get on it. Should have just had the local performance exhaust shop here build me an exhaust instead of buying the Tanabe and then having to cut it up and replace the resonator and muffler. Would have been cheaper.