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How to keep the rumble after cold start?

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Old Mar 7, 2011 | 09:29 AM
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How to keep the rumble after cold start?

Guys, we all love our C63's bark dring a cold start and the rumbles it produces, but all mellow out to a purr after a few seconds. I would like to know is there's a way to keep the rumbling during idle? That would be awesome. Thanks
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Old Mar 7, 2011 | 09:33 AM
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Originally Posted by Jak63AMG
Guys, we all love our C63's bark dring a cold start and the rumbles it produces, but all mellow out to a purr after a few seconds. I would like to know is there's a way to keep the rumbling during idle? That would be awesome. Thanks
Remove the cats and resonators as a first step. Still not happy then go with headers.
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Old Mar 7, 2011 | 09:42 AM
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I think it's enough if you delete your 2nd cat at first and drive it around for a few days. It gets louder each day. If that's not enough - delete the resonator.
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Old Mar 7, 2011 | 09:45 AM
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Will I loose some low end power due to loss of back pressure if I remove the 2nd cats and resonator?
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Old Mar 7, 2011 | 09:48 AM
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I removed my 2nd cats and haven't noticed any difference. Maybe except for the much louder exhaust note
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Old Mar 7, 2011 | 10:26 AM
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It still loses the bark after a few.. Try cams!!!
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Old Mar 7, 2011 | 11:26 AM
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Probably a NOOB question but hey gotta ask sometime - How do i remove the secondary cats and resonator? Is it an easy procedure? Does it take long? is it legal?
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Old Mar 7, 2011 | 01:04 PM
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Originally Posted by dodger63
It still loses the bark after a few.. Try cams!!!
I saw someone describe a lumpy cam idle like this and I thought it was appropriate and funny: "potato... potato... potato."
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Old Mar 7, 2011 | 01:35 PM
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Originally Posted by mrwolf
Probably a NOOB question but hey gotta ask sometime - How do i remove the secondary cats and resonator? Is it an easy procedure? Does it take long? is it legal?
2nd cat delete took 40min at my local exhaust shop. Cost me ~$100

Last edited by olszowa12; Mar 7, 2011 at 01:42 PM.
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Old Mar 7, 2011 | 03:06 PM
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If you really want to keep that loud idle then remove your mufflers.
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Old Mar 7, 2011 | 04:30 PM
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You can either get a shop to do straight pipes or buy an X-pipe from vendors (fluid or ronalsales) to replace secondary cats. It will cost you either a few hundred or less than $1K.
If not loud enough, consider downpipes from vendors above or headers (see stickies for vendors).
The cold bark with headers or downpipes needs to be heard at least once in your lifetime . It is awesome.
None of this is a "do it yourself" unless you have a lift and the proper tools.
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Old Mar 7, 2011 | 05:15 PM
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I have no cats no resonators no mufflers! Headers and straight 3" pipes and it still purrs like a kitten after the start up bark
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Old Mar 7, 2011 | 06:23 PM
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that's just wrong on so many levels it makes it absolutely right!!

Originally Posted by dodger63
I have no cats no resonators no mufflers! Headers and straight 3" pipes and it still purrs like a kitten after the start up bark
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Old Mar 7, 2011 | 07:54 PM
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Originally Posted by sighting
that's just wrong on so many levels it makes it absolutely right!!
I'll video a cold start tomorrow for u guys!
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Old Mar 7, 2011 | 07:56 PM
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Originally Posted by SonnyakaPig
I saw someone describe a lumpy cam idle like this and I thought it was appropriate and funny: "potato... potato... potato."


My friends say my 66 sounds like "Hot For Teacher" intro.

http://www.youtube.com/watch?v=J1s6tIYHlco


Going by Mike it seems Cams are the way to go...
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Old Mar 7, 2011 | 08:10 PM
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Originally Posted by propain


My friends say my 66 sounds like "Hot For Teacher" intro.

http://www.youtube.com/watch?v=J1s6tIYHlco


Going by Mike it seems Cams are the way to go...
That's what my car sounds like at idle but very low!
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Old Mar 7, 2011 | 09:29 PM
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Originally Posted by dodger63
That's what my car sounds like at idle but very low!
Cant wait to hear it! That MHP race exhaust must sound sick! Ill let you use my Pbox if you don't have one!
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Old Mar 7, 2011 | 09:44 PM
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change the idle to 1200rpm or watever it is
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Old Mar 7, 2011 | 09:48 PM
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Originally Posted by propain
Cant wait to hear it! That MHP race exhaust must sound sick! Ill let you use my Pbox if you don't have one!
What's a p-box
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Old Mar 7, 2011 | 10:50 PM
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Thanks for all the inputs, guys
I will delete the secondary cats and resonators and see from there. Thinking about changing headers but it's a RHD car and not too many manufacture makes one for RHD
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Old Mar 7, 2011 | 11:25 PM
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Originally Posted by Jak63AMG
Thanks for all the inputs, guys
I will delete the secondary cats and resonators and see from there. Thinking about changing headers but it's a RHD car and not too many manufacture makes one for RHD
Like dodge63 said, that won't doing anything for your warm idle. It will make the car louder under acceleration, but at cruise and idle, the car will sound the same as stock. I know the rumble you are after, and the only thing I think will change this are cams.
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Old Mar 7, 2011 | 11:43 PM
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Anybody know where to get this cams? Thks
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Old Mar 7, 2011 | 11:52 PM
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MHP
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Old Mar 8, 2011 | 09:00 AM
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Originally Posted by dodger63
What's a p-box
Vbox (Performance Box)
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Old Mar 8, 2011 | 06:11 PM
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http://www.youtube.com/watch?v=5BEETATzg6Y

See if this works
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