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Anyone running catalytic converter on a turbo setup?

  • Thread starter Thread starter Mstng93SSP
  • Start date Start date Apr 13, 2021
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Mstng93SSP

You have a nice rear end there Dave.
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#1
  • Apr 13, 2021
  • #1
Is anyone running a turbo with a catalytic converter? I was thinking of replacing the short pipe where the cutout/dump part is with a 3" catalytic converter with v band clamp ends welded on. Would this effect the turbo negatively in any way? I have always run cats on my cars, I do not like the exhaust smell without them.

Thanks

Chris
 

a91what

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#2
  • Apr 13, 2021
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Yes, however in my setup the cats are before the turbo.

You will not damage the cat with a turbo setup.
 
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90sickfox

Wasn't a pretty sight...and I've got big hands
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#3
  • Apr 13, 2021
  • #3
I'm planning to have a cat on my car as well.
 
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Mstng93SSP

You have a nice rear end there Dave.
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#4
  • Apr 13, 2021
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Awesome. Thank you. I'm almost ready to schedule some tuning Steve. Will let you know.

Chris
 
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a91what

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#5
  • Apr 13, 2021
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Mstng93SSP said:
Awesome. Thank you. I'm almost ready to schedule some tuning Steve. Will let you know.

Chris
Click to expand...
No problem sir, which project did this go into?
 

Mstng93SSP

You have a nice rear end there Dave.
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My 1993 SSP with the rebuilt 306 with the tfs 11r heads.
 

Kabuki_notch

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#7
  • Apr 13, 2021
  • #7
Curious to see how the cat works out been considering one for my car
 

Mstng93SSP

You have a nice rear end there Dave.
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#8
  • Apr 13, 2021
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Yeah, my thought is I will never use that cutout...or whatever it is called. So I figure a good 3" cat in place if it would work.
 

a91what

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#9
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High flow cats are a must for me, I can't stand the smell of a streetcar without them.
 
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General karthief

wonder how much it would cost to ship you a pair
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#10
  • Apr 13, 2021
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Something that just dawned on me (where's the 'light bulb' emogi?)
Everybody talks about the stinky exhaust with no cats, I have no cats (well not for the car anyway)and never noticed any unpleasant odors (other than when I forget my deodorant, sorry Steve), never gave it much thought until tonight. Everybody was smelling a chemical rich odor, I was not, maybe cause with the spark plugs loose I was lean, less chemical, more oxygen.
Am I thinking this correctly is my cartoon mind confusing me?
I'm thinking I need to add cats to the list, fauck, gonna run outta carboard at this rate.
 

CarMichael Angelo

my rearend will smell so minty fresh,
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#11
  • Apr 13, 2021
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a91what said:
Yes, however in my setup the cats are before the turbo.

You will not damage the cat with a turbo setup.
Click to expand...
no, but you’re gonna damage the turbo with the cat setup.
 

a91what

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CarMichael Angelo said:
no, but you’re gonna damage the turbo with the cat setup.
Click to expand...
how so?
 

CarMichael Angelo

my rearend will smell so minty fresh,
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#13
  • Apr 13, 2021
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a91what said:
how so?
Click to expand...
stand by..
 

CarMichael Angelo

my rearend will smell so minty fresh,
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#14
  • Apr 13, 2021
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This is a flowmaster " spun" catalytic converter that i had on the Monster maybe a couple of years ago...


This is what it looked like after I ran it for a year.


What do ya spose happened to all of the catalyst material that was inside this thing, and what do you think happens when a turbine impeller has to eat it?
 

Mstng93SSP

You have a nice rear end there Dave.
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#15
  • Apr 13, 2021
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So a cat pre turbo might be an issue, but after the turbo should be O.K. if I am reading you correctly.
 
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SorsCode

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#16
  • Apr 14, 2021
  • #16
My Audi has the Catalytic Converter mounted right after the turbo. I think there is like 1-2" between the converter and the turbo flange. On my Mustang I run the converter a little farther downstream just because of space (Near where most H/X Pipes mount them.
 

7991LXnSHO

wanna catch the space herp
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#17
  • Apr 14, 2021
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90sickfox said:
I'm planning to have a cat on my car as well.
Click to expand...
We had to replace this cat on the car as it did not protect the wiring.
Unless a convertor is too small or clogged, of course you can run one with a turbo. Factory turbo cars come with them all the time.
 
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a91what

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#18
  • Apr 14, 2021
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CarMichael Angelo said:
This is a flowmaster " spun" catalytic converter that i had on the Monster maybe a couple of years ago...


This is what it looked like after I ran it for a year.


What do ya spose happened to all of the catalyst material that was inside this thing, and what do you think happens when a turbine impeller has to eat it?
Click to expand...
I hope so, it will give me a reason to get better turbos
 

revhead347

Apparently my ex-husband made that mistake.
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#19
  • Apr 14, 2021
  • #19
CarMichael Angelo said:
This is a flowmaster " spun" catalytic converter that i had on the Monster maybe a couple of years ago...


This is what it looked like after I ran it for a year.


What do ya spose happened to all of the catalyst material that was inside this thing, and what do you think happens when a turbine impeller has to eat it?
Click to expand...
Aftermarket catalytic converters are notoriously poor quailty to meet a price point. They cheap out on the alloys. That's why you get like $50 at the scrap yard for an OEM cat, and like a buck for an aftermarket one. Then you throw one of the crappiest brands on top of that for your nostalgic experience moment. I think your particular experience has value for a theoretical discussion, but isn't a hard and fast rule for making a turbo setup.

Kurt
 

TOOLOW91

If you're the village idiot what's that make me?
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#20
  • Apr 21, 2021
  • #20
Any real high performance forced induction csr I have seen making any type of power tends to do exactly what mike displayed . I looked into this for my car to a - quiet it down a smidge , and b clean up some of the exhaust smell . It isn’t terrible but it’s there . To no avail I cannot find a cat to last at the power levels to justify doing it .
 
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