I want more power, but I don't want more noise
04-12-19, 11:09 AM
#31
Moderator
Make no mistake, the Joe Z exhaust is loud and resonates in the car at low RPM. I’m 33, and over my loud car days. I love my PPE / Joe Z combo, but it’s not a daily driver. There are louder cars, but to say that this is quiet is just silly.
my neighbors hate it.... if that tells you anything. Neighbors don’t hate quiet cars.
my neighbors hate it.... if that tells you anything. Neighbors don’t hate quiet cars.
04-12-19, 01:03 PM
#32
Racer
Thread Starter
People want different things. I know there's a lot of guys/gals here that will sacrifice anything for power. I was one of them. I took a normal family sedan and doubled the output and one of the mods was a 3 inch exhaust. It was ear splitting loud. So much so that it was kinda embarrassing, and exhausting to drive. Some of us don't want to be the center of attention always, and the ISF excels in that. It is a joy to drive for many simply because it's understated lexus quietness, but it hides a beast of a motor.
The stock exhaust manifold isn't a great design, and there is power to be made there. But some of us don't want that constant exhaust noise. I think the PPE dual mode would work well, or like I said earlier a e-cutout dump would give you the best of both worlds.
The stock exhaust manifold isn't a great design, and there is power to be made there. But some of us don't want that constant exhaust noise. I think the PPE dual mode would work well, or like I said earlier a e-cutout dump would give you the best of both worlds.
Some of us just like to keep a super low profile, while still being able to extract additional power from the motor without smurf juice or boost.
My goal is to increase power while maintaining close to stock exhaust note in a completely stock looking ISF. With Headers, midpipe and highflow cats I can do just that. The tune would help with more power and eliminating the need to run 02 conditioners, but I prefer a custom dyno tune rather than "off the shelf map", so I'm willing to wait until I find the right tuner/installer.
04-18-19, 09:25 AM
#34
04-18-19, 10:31 AM
#35
There was a member that I think was international that did do an e-cutout. He posted a video and then seemingly disappeared. I'm still enjoying my ISF stock, thought the modification bug is never that far away. If I did go with headers I think I'd probably go the e-cutout route. The 3 inch exhaust I had on my last turbo vehicle was just too exhausting to drive after a while.
04-18-19, 12:11 PM
#36
I am surprised no one mentioned to install side branch resonators. I have Joe Z, and I have to say it drones. I don't get the saying it quiets down after break in. It never quieted down. I think people just get used to the sound, instead of it quieting down. I did install the PPE equal length headers with hi flow cats. And let me tell you, the sound was LOUD. For me, it was unacceptable in this car. I had an exhaust shop install side branch resonators, and it made a world of difference. The car is much quieter, no drone, and no loss in performance. Look into this. You can get all this, and have a quieter car.
Last edited by airvtec; 04-18-19 at 05:18 PM.
04-18-19, 12:19 PM
#37
I am surprised no one mentioned to install side branch resonators. I have Joe Z, and I have to say it drones. I don't get the saying it quiets down after break in. It never quieted down. I think people just get used to the sound, instead of it quieting down. I did install the PPE equal length headers with hi flow cats. And let me tell you, the sound was LOUD. For me, it was unacceptable in this car. I had an exhaust shop install side branch resonators, and it made a world of difference. The car is much quieter, no drone, and no loss in performance. Looks into this. You can get all this, and have a quieter car.
The following 4 users liked this post by airvtec:
04-19-19, 11:01 AM
#40
I did not know this was an OPTION!!!...
guess i know what im doing.
guess i know what im doing.
04-19-19, 12:11 PM
#41
They work. Just gotta do the math to figure out the diameter and length to hit the frequency range you want to eliminate.
04-20-19, 05:28 PM
#42
Racer
Thread Starter
More i think about it, the dual mode exhaust makes sense. In other words, do it all the way or don't do it at all.
I prefer the muscular sound, so maybe the unequal length headers would make more sense, saving about $1,000.
I prefer the muscular sound, so maybe the unequal length headers would make more sense, saving about $1,000.
04-21-19, 01:51 AM
#43
I'll get straight to the point, unless someone has said it.
OEM Midpipe and Axleback with PPE headers. Period. That's the best setup possible in order to retain the quietness of this car.
Save yourself money for a catback and apply it to the headers and install. I would've done that if I rethought of it.
OEM Midpipe and Axleback with PPE headers. Period. That's the best setup possible in order to retain the quietness of this car.
Save yourself money for a catback and apply it to the headers and install. I would've done that if I rethought of it.
04-21-19, 08:35 AM
#44
Eager to hear back from you.
Seems ISF drones at the same RPM for anyone with any exhaust drone issues, so your resonator dimensions should work with other exhaust systems like Borla too, right?
Last edited by Rossi; 04-22-19 at 07:22 AM.
04-22-19, 03:45 PM
#45
I didn't do any calculations. I just asked the guy to install the longest possible. I believe 2" diameter is what will fit in that area. There are formulas online you can use to calculate the length you need. If your exhaust shop is willing, you can ask them to make a temporary adjustable length one. Make adjustments until you hit the sweet spot, but as you can imagine this will take time. I don't know about the Borla exhaust, however I would imagine it should apply. The Joe Z drones right below 2k RPM. I wish someone with the technical know-how can figure out the exact length and diameter.