Exhaust cavitation?

Itethai · 09-08-2023, 03:20 PM

Hi guys, I have a ‘23 1SS convert m6 and just noticed the ‘non’ round exhaust on both sides just before the muffler. Is this normal? Thanks.

Keith 2020 2ss · 09-08-2023, 04:14 PM

I jacked my car up for the first time last week.

Mine has the same design.

RideWithDanger · 09-08-2023, 04:35 PM

Ah yes, the "crush pipe" on our Camaros. Its to make enough clearance for the extra bracing needed on convertible models. Tons of testing has been done and its not restrictive on your exhaust at all. Completely normal.

CTRifecta · 09-08-2023, 04:38 PM

Quote:

Originally Posted by RideWithDanger

Ah yes, the "crush pipe" on our Camaros. Its to make enough clearance for the extra bracing needed on convertible models. Tons of testing has been done and its not restrictive on your exhaust at all. Completely normal.

Crazy how it doesn't restrict HP, are we sure??

RideWithDanger · 09-08-2023, 04:46 PM

Quote:

Originally Posted by CTRifecta

Crazy how it doesn't restrict HP, are we sure??

Yes, type "crush pipe" in the search bar and you'll see its been tested countless times over the years. It has no negative effect on power.

Itethai · 09-08-2023, 05:29 PM

Ok, thanks guys…gives me a little peace of mind. I’m just so used to seeing no anomalies like that in an exhaust system.

arpad_m · 09-08-2023, 06:18 PM

Quote:

Originally Posted by Itethai

Ok, thanks guys…gives me a little peace of mind. I’m just so used to seeing no anomalies like that in an exhaust system.

Everyone has the same intuition about this, hence the amount of testing it got. Sure, it looks butt ugly, but surprisingly enough, the crushed pipe section isn't a restriction until one's into bonkers crazy 4-digit horsepower numbers (one, it isn't bashed in completely and two, it's located very far from the engine).

Don't give this any more thought, just enjoy the car

Ventmaster · 09-08-2023, 08:17 PM

Yep, I know it doesn't hurt performance at all, but I still had to get the crush delete pipes.
AND I don't believe the explanation about needing clearance for the verts.
You can see on Itethal's vert that the exhaust returns to full round before the next obstacle. IMHO, I think Chevy is actually using that section of the exhaust as a resonator. And sometimes I think it sounded better... crushed.

Kamero6 · 09-08-2023, 11:02 PM

Quote:

Originally Posted by Ventmaster

Yep, I know it doesn't hurt performance at all, but I still had to get the crush delete pipes.
AND I don't believe the explanation about needing clearance for the verts.
You can see on Itethal's vert that the exhaust returns to full round before the next obstacle. IMHO, I think Chevy is actually using that section of the exhaust as a resonator. And sometimes I think it sounded better... crushed.

This could be the reason...
I think it was pagani when he added turbos to his zonda or whatever model was, the sound took a hit and he send the exhaust to a engineering company and they crushed and expanded the pipes with an hydraulic machine in specific areas to make the engine sound good again.

Ventmaster · 09-09-2023, 12:10 AM

Bingo Kamero6!

Itethai · 09-10-2023, 08:50 PM

Strange to think…there’s plenty of room for a normal pipe without it being the ‘crushed pipe’. It doesn’t seem necessary, then again I’m no engineer.

TP2SS · 09-11-2023, 12:09 AM

On a recent episode of Roadkill Garage, F & D were putting a power steering gearbox in the big block crusher Impala and had to pound some dents into one of the header tubes. Freiburger mentioned they did dyno testing on doing this on Engine Masters and found no real difference in power unless the denting was pretty severe.

09-08-2023, 03:20 PM	#1
Itethai Drives: ‘23 SS M6 vert Join Date: Nov 2022 Location: Hill Country, Texas Posts: 27	Exhaust cavitation? Hi guys, I have a ‘23 1SS convert m6 and just noticed the ‘non’ round exhaust on both sides just before the muffler. Is this normal? Thanks. Attached Images

09-08-2023, 04:14 PM	#2
Keith 2020 2ss Drives: 2020 2ss Join Date: Sep 2023 Location: Houston Posts: 7	I jacked my car up for the first time last week. Mine has the same design. Last edited by Keith 2020 2ss; 09-08-2023 at 04:38 PM.

09-08-2023, 04:35 PM	#3
RideWithDanger Drives: 23 2SS 1LE Join Date: Feb 2019 Location: GA Posts: 624	Ah yes, the "crush pipe" on our Camaros. Its to make enough clearance for the extra bracing needed on convertible models. Tons of testing has been done and its not restrictive on your exhaust at all. Completely normal. __________________ Instagram: RideWithDanger Current Mods: Rotofab, Ported LT2 intake, LT5 TB, Kooks Headers, AWE Touring Catback Radiant Red 23' 2SS 1LE 1100: 11/14/22 \| BUILT: 3/16/23 2000: 2/17/23 \| 4200: 5/8/23 3000: 2/27/23 \| 5000/6000: 5/15/23

09-11-2023, 12:09 AM	#12
TP2SS Drives: 2016 2SS Convertible Join Date: Dec 2019 Location: SE Michigan Posts: 587	On a recent episode of Roadkill Garage, F & D were putting a power steering gearbox in the big block crusher Impala and had to pound some dents into one of the header tubes. Freiburger mentioned they did dyno testing on doing this on Engine Masters and found no real difference in power unless the denting was pretty severe. __________________ 2016 2SS Convertible Hyper Blue/Ash Gray A8 Magnetic Ride Control Dual Mode Exhaust 2019+ version Split Spoke Silver Wheels Navigation Silver Rally Stripes

09-08-2023, 05:29 PM	#6
Itethai Drives: ‘23 SS M6 vert Join Date: Nov 2022 Location: Hill Country, Texas Posts: 27	Ok, thanks guys…gives me a little peace of mind. I’m just so used to seeing no anomalies like that in an exhaust system.

09-08-2023, 08:17 PM	#8
Ventmaster Drives: 2017 1SS 6spd Join Date: Jan 2011 Location: Utah Posts: 3,022	Yep, I know it doesn't hurt performance at all, but I still had to get the crush delete pipes. AND I don't believe the explanation about needing clearance for the verts. You can see on Itethal's vert that the exhaust returns to full round before the next obstacle. IMHO, I think Chevy is actually using that section of the exhaust as a resonator. And sometimes I think it sounded better... crushed.

09-09-2023, 12:10 AM	#10
Ventmaster Drives: 2017 1SS 6spd Join Date: Jan 2011 Location: Utah Posts: 3,022	Bingo Kamero6!

09-10-2023, 08:50 PM	#11
Itethai Drives: ‘23 SS M6 vert Join Date: Nov 2022 Location: Hill Country, Texas Posts: 27	Strange to think…there’s plenty of room for a normal pipe without it being the ‘crushed pipe’. It doesn’t seem necessary, then again I’m no engineer.

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