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[ZR1] Exhaust popping and spitting upon deceleration

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Old 01-02-2011, 09:00 PM
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355Spider
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Default Exhaust popping and spitting upon deceleration
Anyone elses Zr1 do this? its not alot but I'm not sure it's normal. My Z06 did it after muffler mod.
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Old 01-02-2011, 09:45 PM
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911/Q45
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Mine does, I like it!
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Old 01-02-2011, 10:36 PM
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Cool. Sounds good to Me to.
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Old 01-02-2011, 11:30 PM
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QUIKAG
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Is this on decel with the exhaust flaps open with the fuse pulled or M2W controller?
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Old 01-02-2011, 11:39 PM
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howl
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More pronounced with flaps open. Does it with them closed as well. They all do it, it is normal (my Ferrari does it as well).
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Old 01-02-2011, 11:58 PM
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FIRSTC6Z06
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Originally Posted by howl
More pronounced with flaps open. Does it with them closed as well. They all do it, it is normal (my Ferrari does it as well).
Should not happen with butterflies closed. Mine doesn't pop unless I open up the valves.
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Old 01-03-2011, 12:02 AM
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dvandentop
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prob due to the x pipe as well in the zr1 design so that helps a little too
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Old 01-03-2011, 09:37 AM
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Originally Posted by FIRSTC6Z06
Should not happen with butterflies closed. Mine doesn't pop unless I open up the valves.
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Old 01-03-2011, 11:09 AM
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Originally Posted by 355Spider
Anyone elses Zr1 do this? its not alot but I'm not sure it's normal. My Z06 did it after muffler mod.
Uh yeah, it's the Race Car effect The GS does it too.
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Old 01-03-2011, 11:17 AM
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If it is an aftermarket exhaust the popping is from unburned gasses from deceleration. No worry its normal cause mine does it as well and I have a Base C6.
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Old 01-03-2011, 01:05 PM
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I guess you never drove a nice 396 or (real) 427 ....even a well built dual exhaust 327 or 350 will do this. You're driving a muscle car with a big engine that breathes deeply. Enjoy the sounds of respiration.
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Old 01-03-2011, 04:55 PM
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Originally Posted by OregonC6
I guess you never drove a nice 396 or (real) 427 ....even a well built dual exhaust 327 or 350 will do this. You're driving a muscle car with a big engine that breathes deeply. Enjoy the sounds of respiration.
Love that noise It's bad ***!
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Old 01-03-2011, 06:29 PM
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It is a great sound, indeed.
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Old 01-03-2011, 07:28 PM
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Originally Posted by OregonC6
I guess you never drove a nice 396 or (real) 427 ....even a well built dual exhaust 327 or 350 will do this. You're driving a muscle car with a big engine that breathes deeply. Enjoy the sounds of respiration.
So are you saying the Z06 is not a real 427? Just kidding. I know it's not a big block. But yes my Z06 after the muffler mod spit and popped alot. And it did sound very good.
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Old 01-03-2011, 09:05 PM
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Originally Posted by 355Spider
So are you saying the Z06 is not a real 427? Just kidding. I know it's not a big block. But yes my Z06 after the muffler mod spit and popped alot. And it did sound very good.
I know some people who REALLY don't know that the 427 is not a big block
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Old 01-05-2011, 11:31 AM
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A lot of it is in the tuning. Decel enleanment cuts the fuel off on decel. Not enough fuel for combustion in the chamber, so the last little bit that is there goes out the pipes as raw fuel. Pops when it hits the oxygen. Increase the decel fuel and the popping will go away, mpgs will take a little hit.
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Old 01-05-2011, 01:14 PM
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Mine does it every time I shift, since changing to Corsa.
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Old 01-05-2011, 01:18 PM
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Default pops and burbbles
I love the burbble - these cars are hot!
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Old 01-05-2011, 02:09 PM
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Originally Posted by Michrider
A lot of it is in the tuning. Decel enleanment cuts the fuel off on decel. Not enough fuel for combustion in the chamber, so the last little bit that is there goes out the pipes as raw fuel. Pops when it hits the oxygen. Increase the decel fuel and the popping will go away, mpgs will take a little hit.
Michrider pretty much nailed it here. It is very normal and is not causing any harm. It is there with the factory mufflers they just cancel it out so you don't hear it much. When you replace the exhaust with something less restrictive or louder you start hearing it more. I am with a lot of you guys and like it.
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