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Old 06-07-2009, 01:02 AM   #1
SubSolar
 
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Any exhaust sound clips of L99 in 4 cylinder mode?

Searched youtube and couldn't find any. I assume it sounds like rice in 4 cylinder mode.
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Old 06-07-2009, 01:03 AM   #2
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Actually, tuning the exhaust note was very important to development. It will sound different, but it shouldn't sound bad at all.
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Old 06-07-2009, 01:04 AM   #3
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Hmmm, that's a good question. I honestly don't know
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Old 06-07-2009, 10:01 AM   #4
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Just need someone with a video camera to run real fast down the highway behind one
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Old 06-07-2009, 10:35 AM   #5
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are we saying when you start it up its in 4 cyl mode . if so thats why it sounds so week
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Old 06-07-2009, 10:38 AM   #6
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Quote:
Originally Posted by Jamie Mac View Post
Just need someone with a video camera to run real fast down the highway behind one
The mental image of that just crack's me up.
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Old 06-07-2009, 11:11 AM   #7
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are we saying when you start it up its in 4 cyl mode . if so thats why it sounds so week
yeah i agree i hope it starts in 8 cyl mode then goes down to 4
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Old 06-07-2009, 11:35 AM   #8
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It's in V-8 mode until it's driving a constant speed on a level or down-grade surface, then AFM activates....at that time there's really not a "load" on the engine so sound difference will be very minimal.
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Old 06-07-2009, 11:56 AM   #9
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I havent noticed any difference in exhaust note, if you could compare it to anything its almost like when you stomp the go pedal , its like a transmission kicking down from 6th gear but its the engine doing it not the tranny, if that makes any sense
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Old 06-07-2009, 12:48 PM   #10
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I would imagine it would be like my wife's Tahoe, if it weren't for the info center you wouldn't be able to tell that the engine had dropped to four cyl. mode. The power is still there when you jump on it, but you can't tell otherwise. As far as exhaust note I'm not sure, we haven't changed the exhaust on her Tahoe yet, and with the stock exhaust it is not noticeable.
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Old 06-07-2009, 01:30 PM   #11
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I've listened to a few Chevy/GMC trucks with aftermarket exhaust and there was no audible difference.
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