3.5" catalytic converter on turbo car? - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 15 Old 06-14-2009, 11:45 AM Thread Starter
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3.5" catalytic converter on turbo car?

In the near future I'll be changing from my current twin .63/.60 set up to a single MP T70 (.96 w/ 3.5" DP). I want the car to be somewhat "clean" so I'll be putting either two 2.5" converters after the y-pipe or a single 3.5" before it.

I came across this part number. http://www.summitracing.com/parts/MPE-59920/ Anybody use this cat before? If so, how'd you like it?

I'm also looking for other recommendations on large diameter converters. Any help would be appreciated.

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post #2 of 15 Old 06-19-2009, 11:44 PM Thread Starter
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Am I the only with a "clean" turbo car?

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post #3 of 15 Old 06-20-2009, 12:20 AM
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I plan on doing a 3.5 converter for the street with a cutout for the track.
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post #4 of 15 Old 06-20-2009, 05:03 PM
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Just so you know it says that that's not CA legal. I don't know what all you are trying to do but just thought I would point that out.

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post #5 of 15 Old 06-20-2009, 11:29 PM
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You need to make sure that you've got the calibration done very good, else you can make a fireball just waiting to go off. I wanted to put a cat on mine, but its not tuned up so good yet. They need to get very hot to work properly, and with a turbo car, and fuel going rich under boost, etc...Once it loads up with fuel, then starts heating up you can really get in trouble quick with a runaway situation...

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post #6 of 15 Old 06-21-2009, 02:36 AM
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Just so you know it says that that's not CA legal. I don't know what all you are trying to do but just thought I would point that out.
In Cali, you can't modify ANYTHING between the engine and the catalytic converter(s), so 99% of turbo kits are illegal. I'm guessing he's just doing it to lower emissions, and put less crap in the air.

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post #7 of 15 Old 06-21-2009, 09:48 AM
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I believe all cats in CA are required to have a registration number to be legal.
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post #8 of 15 Old 06-21-2009, 11:27 AM
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Do you have a smog pump? EGR?

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post #9 of 15 Old 06-21-2009, 11:45 AM Thread Starter
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I'm guessing he's just doing it to lower emissions, and put less crap in the air.
Correct.
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post #10 of 15 Old 06-21-2009, 11:46 AM Thread Starter
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Do you have a smog pump? EGR?
No smog pump. EGR's been turned off/disabled.

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post #11 of 15 Old 06-21-2009, 11:48 AM Thread Starter
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Originally Posted by my8950 View Post
You need to make sure that you've got the calibration done very good, else you can make a fireball just waiting to go off. I wanted to put a cat on mine, but its not tuned up so good yet. They need to get very hot to work properly, and with a turbo car, and fuel going rich under boost, etc...Once it loads up with fuel, then starts heating up you can really get in trouble quick with a runaway situation...
Never heard that. How do the turbo cars today get it to work?
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post #12 of 15 Old 06-21-2009, 12:29 PM
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Originally Posted by my8950 View Post
You need to make sure that you've got the calibration done very good, else you can make a fireball just waiting to go off. I wanted to put a cat on mine, but its not tuned up so good yet. They need to get very hot to work properly, and with a turbo car, and fuel going rich under boost, etc...Once it loads up with fuel, then starts heating up you can really get in trouble quick with a runaway situation...
wtf?

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post #13 of 15 Old 06-21-2009, 12:48 PM
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Never heard that. How do the turbo cars today get it to work?
If you mean factory cars, they work because they are tuned right for the combination being sold or as he put it they are "calibrated"

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post #14 of 15 Old 06-21-2009, 10:31 PM
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Do you know how the catalytic convertor works? If so, then what I said would make sense, if not, then go ahead and put one on with your car running half ass...You'll soon find out why I said that.....
I'd like to also put one on to help put less crap in the air...But since my car goes so rich sometimes, then transition or something, now its super lean, next thing you know that cat lights off and if it stays lean you'll end up with a runaway condition and burn the thing down....Anyhow, since I'm talking out of my ass, don't listen...

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post #15 of 15 Old 06-22-2009, 09:31 AM Thread Starter
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Do you know how the catalytic convertor works? If so, then what I said would make sense, if not, then go ahead and put one on with your car running half ass...You'll soon find out why I said that.....
I'd like to also put one on to help put less crap in the air...But since my car goes so rich sometimes, then transition or something, now its super lean, next thing you know that cat lights off and if it stays lean you'll end up with a runaway condition and burn the thing down....Anyhow, since I'm talking out of my ass, don't listen...
Half ass running car? It was a legitimate question, not a shot at you. Thank you for explaining.
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