Supersprint & SCZA 2.5" System w/ Mods

[jbfrancis3]

The fckery continues. I added double slip joints where the rear axle is (open, straight location). I ran it a few times and sure enough, no more NVH.

Looks like the system uses about 3/8" of the slip for expansion, based on the marks from the copper antiseize I added some helper springs to facilitate the slip action and ensure it doesn't want to bow down over time. Everything is well-supported though.

I do like the sound of this muffler, it has a more a kick than previous SCZA.

[jbfrancis3]

Maybe with an unresonated section 2 oversized it would help.

No issues with the exhaust position after it warms up?

I did run it unresonated and it seemed like a good idea but it really didn't liven it up in a positive way.

How do you find the NVH with the RE Muffler mounts? Initially I had only one on the passenger's side so my Sec. 2 wouldn't bang into the RACP but when I put all 3 RE mounts on I really noticed the NVH penalty, mainly just vibration. I would like to put them back on with some type of rubber between the car/mount.

NVH wasn't terrible I guess but the muffler was so rigid with those mounts I was worried that maybe it was almost too stiff and would not let the entire exhaust system up to the headers move back/forth as it should maybe causing issues. Likely not the case.

I reluctantly canceled my order for the oversized Sec. 2 due to all the talk of how quite it was, not to mention my stock sec. 2 in combination w/ SCZA barely fits around the RACP/Diff OPF so I'm pretty sure the SS pipes would have made contact.

I suspect there is NVH caused by the whole system being like a bow under tension when hot. It overcomes the small rubber bushings, I think. The RE mounts seem too stiff without any other give in the system (not exactly surprising). Now, if they system can flex in another way, I'm betting the mounts do not add NVH on their own.

This is why I wouldn't personally do this mod, there's a reason why these are rubber.

Pick your poison. New HKS mounts deteriorated in a year / year and a half on me. Some noted it was due to not running the stainless brackets - I've looked it more and reject that notion. However, I'm inclined to believe that my running v-bands adds to mount stress because there is absolutely zero flex in those joints, so it really pushes the section 3 around.

These are mostly self-inflicted problems (v-bands, RE mounts) but I'm going to keep playing with it.

[jet_dogg]

NVH wasn't terrible I guess but the muffler was so rigid with those mounts I was worried that maybe it was almost too stiff and would not let the entire exhaust system up to the headers move back/forth as it should maybe causing issues. Likely not the case.

This is why I wouldn't personally do this mod, there's a reason why these are rubber.

[Cubieman]

I dont have those mounts, i was deliberating them or at least one. I currently have the OEM muffler mounts with the insert so they dont break practically making them solid with some flex to it. No issues with NVH but there is a slight rattle at warm up I am trying to find. so maybe thats it? HA I've learned to live with it, it disappears.

Whoops, quoted the wrong person! Meant that at jbfrancis3.

[Tonggi]

How do you find the NVH with the RE Muffler mounts? Initially I had only one on the passenger's side so my Sec. 2 wouldn't bang into the RACP but when I put all 3 RE mounts on I really noticed the NVH penalty, mainly just vibration. I would like to put them back on with some type of rubber between the car/mount.

NVH wasn't terrible I guess but the muffler was so rigid with those mounts I was worried that maybe it was almost too stiff and would not let the entire exhaust system up to the headers move back/forth as it should maybe causing issues. Likely not the case.

I reluctantly canceled my order for the oversized Sec. 2 due to all the talk of how quite it was, not to mention my stock sec. 2 in combination w/ SCZA barely fits around the RACP/Diff OPF so I'm pretty sure the SS pipes would have made contact.

I dont have those mounts, i was deliberating them or at least one. I currently have the OEM muffler mounts with the insert so they dont break practically making them solid with some flex to it. No issues with NVH but there is a slight rattle at warm up I am trying to find. so maybe thats it? HA I've learned to live with it, it disappears.

[Cubieman]

I had this with the SS Sport, ti was perfect for when I was putting around town but everyone else outside the car told me how quiet it was.

Maybe with an unresonated section 2 oversized it would help.




No issues with the exhaust position after it warms up?

How do you find the NVH with the RE Muffler mounts? Initially I had only one on the passenger's side so my Sec. 2 wouldn't bang into the RACP but when I put all 3 RE mounts on I really noticed the NVH penalty, mainly just vibration. I would like to put them back on with some type of rubber between the car/mount.

NVH wasn't terrible I guess but the muffler was so rigid with those mounts I was worried that maybe it was almost too stiff and would not let the entire exhaust system up to the headers move back/forth as it should maybe causing issues. Likely not the case.

I reluctantly canceled my order for the oversized Sec. 2 due to all the talk of how quite it was, not to mention my stock sec. 2 in combination w/ SCZA barely fits around the RACP/Diff OPF so I'm pretty sure the SS pipes would have made contact.

[Tonggi]

Sort of what I'm after. Not sure how attainable it is. SCZA is certainly quieter. I'm told it can be heard when car is approaching but from driver's seat, its quite tame.

I had this with the SS Sport, ti was perfect for when I was putting around town but everyone else outside the car told me how quiet it was.

Maybe with an unresonated section 2 oversized it would help.

No issues with the exhaust position after it warms up?

[Sharocks]

The Dinan exhaust also has to break in as well from what I've heard. So give it some time and definitely romp on it when you can!

[jbfrancis3]

Next iteration is complete with the Dinan section 3. It hangs from Rogue Engineering's exhaust mounts. I had to reduce the width of the Dinan mounts by 1/4" (by taking in the passenger-side single mount) to make everything fit nicely. This also set the exhaust dead-center of the CSL valence which was nice.

Early thoughts after one short drive is its a bit boomy down low. In the middle range and top end, its much more lively than the SZCA representing a big step in the right direction. Time will tell on tolerance for low-end characteristics.

With the entire system fairly rigidly mounted, I expected some undesired effect knowing the system lengthens when hot. It did not disappointed. No rattling but some odd vibration/resonance which I think is caused by the inner bush sleeve of the Rogue mounts pushing so hard that it squeezes out the rubber and contacts the bushing housing. Very noticeable and I don't want to continue stressing everything, particularly the headers.

So next up, I'll be installing some double slip joints somewhere in the system (not sure where). Flex joints would work but need more space which is something I don't have. Flex bellows aren't suitable for the application.

https://www.racemufflers.com/product-p/rm-ds-2.5-ss.htm

[Sharocks]

That's a pretty sporty section 3 you run but those are also some serious resonators. Where did you mount them to fit - I assume they are staggered?

They're mounted at the same location as most resonated Sec 1's. Right next to each other. Surprisingly there was enough room.

And they killed off about 80% of the rasp which was the most important part.

This car without rasp sounds weird.

[jbfrancis3]

any sound clips?

I haven't bothered. There's a substantial portion of effect lost from in-person to video/audio recording

I have Full SS V1, to SS S pipe no cats, to oversized Sec 2 with the resonator to an SS race exhaust. And I feel like the Section 2 really quiet down the system, even at high RPMs. I remember the SS race being much louder and from the video's i posted its not super loud. I was thinking of changing exhausts but I decided I wanted to keep it all SS.

Exhausts I had in mind:

Rogue El Diablo (louder?)
Scza (quieter for more airbox sound)

But ultimately i wanted a screamer in high RPMs and tame low (hard I know but maybe a fix in the midpipes is it.

Sort of what I'm after. Not sure how attainable it is. SCZA is certainly quieter. I'm told it can be heard when car is approaching but from driver's seat, its quite tame.

The oversized pipes really do quiet everything down but increase sound at high rpm with specific Section 3's.

Example:

Old Setup: JVT Headers, Racetech Sec 1, SS Unres Sec 2, Mevius Ti

Loud. Extremely loud. Got me kicked off almost every track and autocross in New England lol. Loud on start, loud at idle, loud and raspy but quieted down after about 6k RPM.

New Setup: SSV1, SS Stepped Sec 1 No Cats, SS Oversized Sec 2 Unres, Mevius Ti

Stupid loud. Sounds like a Honda. I used to the mayor of rasp city but I just became the president. Horrid. A tad quieter at idle but after 2k RPM OMG it's embarrassing.

New New Setup: SSV1, SS Stepped Sec 1 with 2 Vibrant Ultra Quiet Resonators, SS Oversized Sec 2 Unres, Mevius Ti

Better. Quieter at start, idle and under 3k RPM. Get's louder with RPM's which is how it should be. Still screams up top but I didn't have to go through flashbacks of Honda rasp to get there.


Overall: These pipe diameters actually change things more than I had thought. Mainly because my car was already loud I could notice these differences immediately. Those running pretty tame Section 3's wouldn't notice it as much I'm sure.

That's a pretty sporty section 3 you run but those are also some serious resonators. Where did you mount them to fit - I assume they are staggered?

[Sharocks]

The oversized pipes really do quiet everything down but increase sound at high rpm with specific Section 3's.

Example:

Old Setup: JVT Headers, Racetech Sec 1, SS Unres Sec 2, Mevius Ti

Loud. Extremely loud. Got me kicked off almost every track and autocross in New England lol. Loud on start, loud at idle, loud and raspy but quieted down after about 6k RPM.

New Setup: SSV1, SS Stepped Sec 1 No Cats, SS Oversized Sec 2 Unres, Mevius Ti

Stupid loud. Sounds like a Honda. I used to the mayor of rasp city but I just became the president. Horrid. A tad quieter at idle but after 2k RPM OMG it's embarrassing.

New New Setup: SSV1, SS Stepped Sec 1 with 2 Vibrant Ultra Quiet Resonators, SS Oversized Sec 2 Unres, Mevius Ti

Better. Quieter at start, idle and under 3k RPM. Get's louder with RPM's which is how it should be. Still screams up top but I didn't have to go through flashbacks of Honda rasp to get there.


Overall: These pipe diameters actually change things more than I had thought. Mainly because my car was already loud I could notice these differences immediately. Those running pretty tame Section 3's wouldn't notice it as much I'm sure.

[Tonggi]

I have the SS dual Sec. 2 comming but am hesitant to install it as it sounds like (pun) it really does quite things down. So that order may need to be canceled or part sold down the river.

I have Full SS V1, to SS S pipe no cats, to oversized Sec 2 with the resonator to an SS race exhaust. And I feel like the Section 2 really quiet down the system, even at high RPMs. I remember the SS race being much louder and from the video's i posted its not super loud. I was thinking of changing exhausts but I decided I wanted to keep it all SS.

Exhausts I had in mind:

Rogue El Diablo (louder?)
Scza (quieter for more airbox sound)

But ultimately i wanted a screamer in high RPMs and tame low (hard I know but maybe a fix in the midpipes is it.

[jbfrancis3]

Im curious what this pink'ish pad is, a heat shield add for the trans mounts? If so im interested, since the added heat from the exhaust can/may serve to dry out rubber bushings on the transmount. jbfrancis3

Yep, for the transmission as a whole including the mounts. The exhaust runs close and the heat radiation is intense. I figure why further thin my trans fluid which I need for dampening with the SMF!

Just a general heat shield meant for one pipe, but the mounts on either side happen match the spacing of the dual pipes on this application. Size 6"x1'

https://www.amazon.com/gp/product/B00CF2RGHQ/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

[CrisSilberGrau]

Im curious what this pink'ish pad is, a heat shield add for the trans mounts? If so im interested, since the added heat from the exhaust can/may serve to dry out rubber bushings on the transmount. jbfrancis3