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Old 11-16-2010, 06:28 PM   #1
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Z/28 Exhaust v.s. SS Exhaust

Do you think GM will use the same exhaust/muffler from the SS on the Z/28 or will it be 3" and better flowing system?

Does anyone know what they use on the new CTS-V coupe? I bet, it will be the same or better.
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Old 11-16-2010, 06:31 PM   #2
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Quad tip i think im not sure about the measurements of the pipe
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Old 11-16-2010, 10:54 PM   #3
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From the looks of it, it looks like the mufflers are more traditionally shaped in addition to what we can easily see in terms of the new tip configuration. I'm sure diameter will increase to anywhere from 2.75 - 3.00-inches.

No one knows for sure yet :(
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Old 11-16-2010, 11:02 PM   #4
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Originally Posted by radz28 View Post
From the looks of it, it looks like the mufflers are more traditionally shaped in addition to what we can easily see in terms of the new tip configuration. I'm sure diameter will increase to anywhere from 2.75 - 3.00-inches.

No one knows for sure yet :(
Hey Radz, thanks!
I'm pretty certain in will be the same as CTS-V. In the recent videos when the Z28 was following the CTS, they both sounded identical. So, we can find out about CTS-V, we know about the Z. But I hope it's more than 2.5 diameter. and better flow CATS.
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Old 11-16-2010, 11:04 PM   #5
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I hope GM does not use those hideous mufflers they gave all of us on our SS's, I was never so happy as I was day I had my Corsa installed at Jannetty Racing.
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Old 11-17-2010, 12:24 AM   #6
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It will be different, most likely a bit louder and freer flowing. How much is anyones guess.
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Old 11-17-2010, 05:43 AM   #7
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The CTS-V exhaust is actually pretty quiet - especially given the power level of the car.
I just can't imagine that the Z/28 would have the same exhaust setup as the SS. I'm sure it would be noticeably louder...

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Old 11-17-2010, 07:16 AM   #8
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Quote:
Originally Posted by DGthe3 View Post
It will be different, most likely a bit louder and freer flowing. How much is anyones guess.
Quote:
Originally Posted by garfin View Post
The CTS-V exhaust is actually pretty quiet - especially given the power level of the car.
I just can't imagine that the Z/28 would have the same exhaust setup as the SS. I'm sure it would be noticeably louder...

Best regards,

Elie
Quote:
Originally Posted by 2010 SSRS View Post
I hope GM does not use those hideous mufflers they gave all of us on our SS's, I was never so happy as I was day I had my Corsa installed at Jannetty Racing.
the nameplate it deserves better!
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Old 11-17-2010, 08:00 AM   #9
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It should also be one of the areas where they save weight over the SS. The SS cans are heavy and huge.
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Old 11-17-2010, 09:29 AM   #10
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Originally Posted by Z_Rocks View Post
Hey Radz, thanks!
I'm pretty certain in will be the same as CTS-V. In the recent videos when the Z28 was following the CTS, they both sounded identical. So, we can find out about CTS-V, we know about the Z. But I hope it's more than 2.5 diameter. and better flow CATS.
Maybe I just haven't heard good enough videos of CTS-Vs, but I thought Z28 was louder; it was certainly popping a lot off the throttle. Regardless, like Elie says below, I know V's exhaust is pretty quiet, much from what I've read in reviews and comparisons. That's why I'm thinking we're getting less restriction, louder, and free-er-flowing exhaust. I don't have any proof, but do hope we get a better cat' design

Quote:
Originally Posted by garfin View Post
The CTS-V exhaust is actually pretty quiet - especially given the power level of the car.
I just can't imagine that the Z/28 would have the same exhaust setup as the SS. I'm sure it would be noticeably louder...

Best regards,

Elie
I know that if it is a dual-mode, and controllable much like the 'Vette versions, and is close to 3-inches, I'll be saving a little money on a CB or even a AB. It doesn't sound great to me, but it's certainly better that stock, and if there's a power gain to be had, that will be my biggest motivator

Quote:
Originally Posted by Shurenuff View Post
It should also be one of the areas where they save weight over the SS. The SS cans are heavy and huge.
I think I remember Pedders saying they helped with air flow, too, hence their shape; I don't recall for sure though Regardless - I'm happy with most any way reasonable for GM to control the weight and minimize it
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Old 11-17-2010, 09:41 AM   #11
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Regardless - I'm happy with most any way reasonable for GM to control the weight and minimize it
Yes, weight is another factor with the stock exhaust system. I really hope for the Z, they use lighter material and better free flow. Honestly, when you spend over $50K for a car like this, you shouldn't have to spend more money for exhaust, CAI and etc. upgrades.

Speaking of CAI, I'm pretty sure we have to change the stock exhaust to a CAI, but if we do, I'm sure we have to retune it, otherwise you get errors from the MAF sensor.

Hey Radz, are you planning to get a Z? If I'd like to hear your reasoning. Not that I need to be convinced, but I like to see if I'm on the page.
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Old 11-17-2010, 01:51 PM   #12
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Look for dual mode on the Z28 and perhaps a titanuim exhaust like the C5 Z06 to save weight.
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Old 11-17-2010, 01:53 PM   #13
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Look for dual mode on the Z28 and perhaps a titanuim exhaust like the C5 Z06 to save weight.
That's the ticket!
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Old 11-18-2010, 12:12 PM   #14
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Originally Posted by Z_Rocks View Post
Yes, weight is another factor with the stock exhaust system. I really hope for the Z, they use lighter material and better free flow. Honestly, when you spend over $50K for a car like this, you shouldn't have to spend more money for exhaust, CAI and etc. upgrades.

Speaking of CAI, I'm pretty sure we have to change the stock exhaust to a CAI, but if we do, I'm sure we have to retune it, otherwise you get errors from the MAF sensor.

Hey Radz, are you planning to get a Z? If I'd like to hear your reasoning. Not that I need to be convinced, but I like to see if I'm on the page.
To be quick: I hope I can I've just be a Z28 fan from the beginning, and it just has more meaning, to me. It was the first car I bought, too. Aside from that, the more obvious are what upgrades to the powertrain, chassis, and appearance that appeals to me.

It'd be pretty cool to see some Ti come back to exhaust, like C5 Zs had. I doubt it, but if we get good sized tubes, good flowing mufflers, and even better - the dual mode valves, I'll be reconsidering any CB or AB purchase. I think there are better sounding exhausts out there, however, if the performance doesn't really match up to the price for those systems, then I'll definately be thinking twice. I've definately got other power-enhancing ideas in mind that I know will make more power with no side-effects except for tire smoke

I believe GM did a great job on SS exhaust, and deliberately tuned it for the ears, so I have no reason to think they won't make similar investments for Z28.
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Old 11-18-2010, 12:42 PM   #15
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I've definately got other power-enhancing ideas in mind that I know will make more power with no side-effects except for tire smoke
Thanks Radz28;
Looks like it was Camaro that has put GM back on the map based on the first day IPO information.

I've been thinking of what would be the minimum $$$ we could do to enhance the power. CAI, pulley and a tune, should bring it to 550 RWHP and not break the warranty.
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Old 11-18-2010, 01:24 PM   #16
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Thanks Radz28;
Looks like it was Camaro that has put GM back on the map based on the first day IPO information.

I've been thinking of what would be the minimum $$$ we could do to enhance the power. CAI, pulley and a tune, should bring it to 550 RWHP and not break the warranty.
Considering Vs are putting down from 440-470 RWHP in many instances, depending on tranny, I'd say exactly the things you're looking to do would get you to 550. I'm on the same page as you, but am crossing my fingers for a 2300. I'm only thinking that because of the revised upper plenum we've seen, but also, just to closer match the GT500. I think the 1900, in consideration of OEM emissions and certifications, might be a little too small for the power increase I'm expecting for Z28, so I just think adding the 2300 on LSA would be a good enough bump so they don't have to crank-up the psi. I have no more information than anyone else though, and am only speculating.

Either way - free-er flowing exhaust is a sure ticket to making more power and I hope GM will capitolize on it
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Old 11-22-2010, 04:49 PM   #17
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Quote:
Originally Posted by Z_Rocks View Post
Thanks Radz28;
Looks like it was Camaro that has put GM back on the map based on the first day IPO information.

I've been thinking of what would be the minimum $$$ we could do to enhance the power. CAI, pulley and a tune, should bring it to 550 RWHP and not break the warranty.
You might want to be careful and check that "tune" on the Z. GM is pretty good about finding out if you retuned their original specs. My understanding is if you re-tune, you just voided the warranty. You might want to check with some of the other members that re-tuned their SS and see if it voided their warranty or not.
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