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Author Topic: Why take out the catalytic converter?  (Read 7809 times)

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PR3VS56

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Why take out the catalytic converter?
« on: January 04, 2009, 02:19:58 PM »
Is it for sound?  Pipe restriction? 

Isn't a little back pressure good for bottom end torque?  How restrictive are the cats, and anyone have before/after dyno numbers?  THANKS!!
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hogasm

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Re: Why take out the catalytic converter?
« Reply #1 on: January 04, 2009, 04:38:06 PM »
Quote from: PR3VS56 on January 04, 2009, 02:19:58 PM
Is it for sound?  Pipe restriction? 

Isn't a little back pressure good for bottom end torque?  How restrictive are the cats, and anyone have before/after dyno numbers?  THANKS!!

Back pressure does help in low end torque...

Too much is bad.....

Too little is bad.....

until someone spends the money to dyno the changes made to their 09's and makes it public.....the answer is up in the air.
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PR3VS56

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Re: Why take out the catalytic converter?
« Reply #2 on: January 04, 2009, 04:54:35 PM »
Is anyone concerned with future vehicle inspections?  I'd hate to go to all the trouble of removing a cat for marginal improvement, then find myself spending big bucks to put it all back again.
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hogasm

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Re: Why take out the catalytic converter?
« Reply #3 on: January 04, 2009, 05:04:10 PM »
Quote from: PR3VS56 on January 04, 2009, 04:54:35 PM
Is anyone concerned with future vehicle inspections?  I'd hate to go to all the trouble of removing a cat for marginal improvement, then find myself spending big bucks to put it all back again.

You guys in California have it tougher than most of us.

If you are concerned then go on Ebay and buy a set of 09 stock headers and just change them out at each inspection.

I know...I know....but if you want to play then you have to pay
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jfh

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Re: Why take out the catalytic converter?
« Reply #4 on: January 04, 2009, 05:34:26 PM »
Quote from: hogasm on January 04, 2009, 05:04:10 PM
You guys in California have it tougher than most of us.

If you are concerned then go on Ebay and buy a set of 09 stock headers and just change them out at each inspection.

I know...I know....but if you want to play then you have to pay

Still waiting for them to become available on eBay.

I know...I know...patience.
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Re: Why take out the catalytic converter?
« Reply #5 on: January 04, 2009, 05:37:10 PM »
Quote from: hogasm on January 04, 2009, 05:04:10 PM
If you are concerned then go on Ebay and buy a set of 09 stock headers and just change them out at each inspection.

If you can find a set on Ebay... none as of late....
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Fired00d

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Re: Why take out the catalytic converter?
« Reply #6 on: January 04, 2009, 06:14:48 PM »
I would also contact some local dealers (service manager/service techs) and let them know you want a set of header pipes off an '09 96ci bike. As soon as the aftermarket catches up and has some complete exhaust systems for the '09's I bet they'll have all kinds of take offs that people don't take home.

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PR3VS56

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Re: Why take out the catalytic converter?
« Reply #7 on: January 04, 2009, 07:19:29 PM »
Quote from: Fired00d on January 04, 2009, 06:14:48 PM
I would also contact some local dealers (service manager/service techs) and let them know you want a set of header pipes off an '09 96ci bike. As soon as the aftermarket catches up and has some complete exhaust systems for the '09's I bet they'll have all kinds of take offs that people don't take home.

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Can the dealers change them out?  I thought I heard something about that.  Slip-ons yes, remove cat no.
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Re: Why take out the catalytic converter?
« Reply #8 on: January 04, 2009, 07:21:41 PM »
Quote from: PR3VS56 on January 04, 2009, 07:19:29 PM
Can the dealers change them out?  I thought I heard something about that.  Slip-ons yes, remove cat no.
Some dealers will change out the entire exhaust system for aftermarket. When they do if they original owner doesn't request their stock exhaust back then they just end up on the dealers shelves or in the dumpster.

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jfh

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Re: Why take out the catalytic converter?
« Reply #9 on: January 04, 2009, 07:44:01 PM »
Quote from: PR3VS56 on January 04, 2009, 07:19:29 PM
Can the dealers change them out?  I thought I heard something about that.  Slip-ons yes, remove cat no.

The headpipes we are after are from non-CVO models and do not have cats, therefore no issue for dealer removal. (Except in CA)
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Re: Why take out the catalytic converter?
« Reply #10 on: January 04, 2009, 07:47:28 PM »
Quote from: hdfr120 on January 04, 2009, 07:44:01 PM
The headpipes we are after are from non-CVO models and do not have cats, therefore no issue for dealer removal. (Except in CA)
I'd bet you find some dealers there doing them and if not at least some "Indy's". :nixweiss:

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Re: Why take out the catalytic converter?
« Reply #11 on: January 04, 2009, 07:51:47 PM »
Quote from: PR3VS56 on January 04, 2009, 02:19:58 PM
Is it for sound?  Pipe restriction? 

Isn't a little back pressure good for bottom end torque?  How restrictive are the cats, and anyone have before/after dyno numbers?  THANKS!!

Because you can ...   :2vrolijk_21:
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RickC

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Re: Why take out the catalytic converter?
« Reply #12 on: January 04, 2009, 07:51:56 PM »
Quote from: Fired00d on January 04, 2009, 07:47:28 PM
I'd bet you find some dealers there doing them and if not at least some "Indy's". :nixweiss:

I think I'll check with the local dealers to see if they have any take-offs lying around...
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HDDOCFL

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Re: Why take out the catalytic converter?
« Reply #13 on: January 05, 2009, 08:11:19 AM »
Quote from: PR3VS56 on January 04, 2009, 07:19:29 PM
Can the dealers change them out?  I thought I heard something about that.  Slip-ons yes, remove cat no.

I have two dealers within 15 miles from me and each say if I remove the cats or add any tuner other than what they install they will void my warrinty, They also say I can put any slip on I want on the bike and it will not effect warrinty.  I do business with both these dealers and I am stuck with just changing mufflers for now Steve cole has a Master Tune that will allow the removal of a tuneing so that the DT will not see it, I may go this route, but the cats for now will have to stay.  Unless I want to go the dealers route with the SEST that only that dealer will honor under warrinty. I may also wait and see what Nightrider comes out with for the 09s like his XIEDs that just fatten up the bike under 4000 rpms .   Doc
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Re: Why take out the catalytic converter?
« Reply #14 on: January 05, 2009, 05:39:55 PM »
But definitely there won`t be any damage caused by removing the cats ,  the engine will run cooler that`s all , what the hell do they fear of by " promising " such silly things . Does that make sense .
My dealer gave me a full warranty-work , because oil was running out of the block , allthough he knew that i had a thundermax and stage one big sucker and opened the mufflers on myself , he knew that this all was not the reason of the oil-pissing-out .
The removed cats won`t cause a damage , never .
The world is strange sometimes .
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