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Okay to remove catalytic converters?

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Old May 24, 2011 | 09:23 PM
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Default Okay to remove catalytic converters?

It may sound like a stupid question, but I am going to ask the experts before I do possibly something stupid...: hide:

Will it make a difference if I remove the catalytic converters on my 86 C4?

I don't think it will hurt anything, but I am new to the Vette thing and make sure it would effect anything as far as timing, the way it runs or anything else....

Sorry again for a stupid question, but all of you know more about it than I do..

Oh thanks for any info/help
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Old May 24, 2011 | 09:32 PM
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Somehow all 3 of my cats went missing.
The exhaust will be a tad louder.
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Old May 24, 2011 | 09:36 PM
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Originally Posted by AGENT 86
Somehow all 3 of my cats went missing.
The exhaust will be a tad louder.
Sweet.. thanks again.. Just wanted to make sure..
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Old May 24, 2011 | 09:48 PM
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[QUOTE=AGENT 86;
The exhaust will be a tad louder. [/QUOTE]

but-Don`t expect any performance gains & if you move somewhere that they are required for inspection, the smog police will not be amused.
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Old May 24, 2011 | 09:55 PM
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Originally Posted by kenv
but-Don`t expect any performance gains & if you move somewhere that they are required for inspection, the smog police will not be amused.



I have a perm/ tag on it and it will not have to be inspected again...
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Old May 24, 2011 | 10:02 PM
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Originally Posted by cutnitclose


I have a perm/ tag on it and it will not have to be inspected again...
Don't throw your old Catalytic Converters in the garbage or trash because they are worth $$ to the right recycling guy.

I have sold old plugged up Cats in my area for $50 - $150.

And this guy I sell them to has to take them in a recycling center in Chicago.
He is making more $$$ yet.

Platinum inside.

Japanese Catalytic Converters are worth the most per pound.
They have Rhodium metal inside.
I was given $80.00 cash for a CAT off a 1993 Honda Civic 4cyl 2 years back.
It was tiny, about 1/2 the size of an old 2-1/2" Cherry Bomb Glasspack muffler.

Brian
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Old May 24, 2011 | 10:03 PM
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Aftermarket CATS are worthless to sell.
They have little or no platinum or rhodium inside.

OEM Cats are worth $$$$$

Last edited by 87 vette 81 big girl; May 24, 2011 at 10:50 PM.
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Old May 24, 2011 | 10:04 PM
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Originally Posted by 87 vette 81 big girl
Don't throw your old Catalytic Converters in the garbage or trash because they are worth $$ to the right recycling guy.

I have sold old plugged up Cats in my area for $50 - $150.

And this guy I sell them to has to take them in a recycling center in Chicago.
He is making more $$$ yet.

Platinum inside.

Japanese Catalytic Converters are worth the most per pound.
They have Rhodium metal inside.
I was given $80.00 cash for a CAT off a 1993 Honda Civic 4cyl 2 years back.
It was tiny, about 1/2 the size of an old 2-1/2" Cherry Bomb Glasspack muffler.

Brian
Wow.. really I didn't know that..... I was going to leave them at the shop... I will take them for sure.. Thanks for the info..
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Old May 24, 2011 | 10:07 PM
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Originally Posted by 87 vette 81 big girl
Aftermarket CATS are worthless to sell.
They little or no platinum or rhodium inside.

OEM Cats are worth $$$$$
I'm sure they are OEM.. There isn't, but 50,543 mile on the car & it wasn't taken care of very well until I picked up... So far I only have 750.00 in it... It would be nice to make a little cash off the CCs to buy items for the interior...
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Old May 24, 2011 | 10:17 PM
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Originally Posted by 87 vette 81 big girl
Aftermarket CATS are worthless to sell.
They little or no platinum or rhodium inside.

OEM Cats are worth $$$$$
People wonder why aftermarket CATS are typically less than OEM, this is why. They don't work as well, less platinum, palladium, and rhodium=less efficient CAT.
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Old May 24, 2011 | 10:20 PM
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Originally Posted by cutnitclose
I'm sure they are OEM.. There isn't, but 50,543 mile on the car & it wasn't taken care of very well until I picked up... So far I only have 750.00 in it... It would be nice to make a little cash off the CCs to buy items for the interior...
If original,

Take a look 1st.
On the aluminized tin heat shields of your Cats on your C4,
They will say or be stamped "AC".
They are on my 1987 VERT.

When I drop my 410sbc in I will lose all 3 CATS.
Have muffler elimantors right now on the car.
Runs decent enough for now.
150 + top end with ease.

I have made an extra few $$$thousand dollars or so in 2008 when times were real bad in the USA for all especially for an Auto Mechanic like myself.

I collected old CATS off of cars & trucks that had plugged CATS.
I installed the new replacement Catalytic Converters.

I claimed the old ones as mine to keep.



Brian
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Old May 24, 2011 | 10:25 PM
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Originally Posted by 87 vette 81 big girl
If original,

Take a look 1st.
On the aluminized tin heat shields of your Cats on your C4,
They will say or be stamped "AC".
They are on my 1987 VERT.

When I drop my 410sbc in I will lose all 3 CATS.
Have muffler elimantors right now on the car.
Runs decent enough for now.
150 + top end with ease.

I have made an extra few $$$thousand dollars or so in 2008 when times were real bad in the USA for all especially for an Auto Mechanic like myself.

I collected old CATS off of cars & trucks that had plugged CATS.
I installed the new replacement Catalytic Converters.

I claimed the old ones as mine to keep.



Brian
I guess I will have to find someone in Tennessee that will buy them.. Can I bust them open myself?
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Old May 24, 2011 | 10:31 PM
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Originally Posted by cutnitclose
I guess I will have to find someone in Tennessee that will buy them.. Can I bust them open myself?
No,

I pisses the buyer off.........lol

Just cut 2" inches back from the catalytic converter body shell on either end.
They buyer will check inside with a flashlight.

If the "Honeycomb matrix " inside is intact 100%,
You will get paid top $$ then.

3 Cats off of a TPI C4 should be worth $125- $150 to right recycling guy.

BR
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Old May 24, 2011 | 10:33 PM
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Originally Posted by cutnitclose
Wow.. really I didn't know that..... I was going to leave them at the shop... I will take them for sure.. Thanks for the info..
Every shop wants you to leave your old catalytic converters.....

Its free $$$$$ to them.

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Old May 24, 2011 | 10:53 PM
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Originally Posted by 87 vette 81 big girl
No,

I pisses the buyer off.........lol

Just cut 2" inches back from the catalytic converter body shell on either end.
They buyer will check inside with a flashlight.

If the "Honeycomb matrix " inside is intact 100%,
You will get paid top $$ then.

3 Cats off of a TPI C4 should be worth $125- $150 to right recycling guy.

BR
Okay.. Thanks again.. now I just need to find a buyer..
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Old May 25, 2011 | 12:29 AM
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Originally Posted by cutnitclose
Will it make a difference if I remove the catalytic converters on my 86 C4?

Oh thanks for any info/help
It will not make a big difference. My 86 has an 85 front pipe modified to mount an 86 style cat. The magnaflo cat works just fine with NO appreciable power loss.

If you want more noise, install a cam. Now that will make a difference!

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Old May 25, 2011 | 01:27 PM
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Unless you are on a dyno, I doubt you will see the difference. I put a Random Technologies cat in because I was sick of the droning.
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To Okay to remove catalytic converters?

Old May 25, 2011 | 05:27 PM
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I was just asking if would matter in the way it ran If I remove them... I can smell a slight scent of one, that make me think one may be clogging up on me, so I thought I would just take them off... I wanted to make sure it wouldn't hurt the performance more than I was hoping it would help it..
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Old May 25, 2011 | 05:39 PM
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Originally Posted by cutnitclose
I was just asking if would matter in the way it ran If I remove them... I can smell a slight scent of one, that make me think one may be clogging up on me, so I thought I would just take them off... I wanted to make sure it wouldn't hurt the performance more than I was hoping it would help it..
I doubt it would make any real difference. I don't remember what the stock configuration is but I believe the O2 sensor is further upstream and near to the exhaust manifold. Also there is no sensor after the cat like the LT engines so I can't see how that would hurt
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Old May 25, 2011 | 06:32 PM
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It wont hurt anything, yank em.
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