Boosted cars melting Cats? - Mustang Evolution

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Old 11-12-2015, 11:34 AM   #1
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Boosted cars melting Cats?

Word on the street is it's a good idea to get rid off the stock cat converters because extra heat/pressure from boost will melt them. Anyone have experience in this? Anyone else here that's running paxton/vortech kits have stock H pipes with stock Cats with everything being ok? Would rather not have to dish out the extra cash to modify exhaust (at least for now), but will if necessary.
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Old 11-12-2015, 11:53 AM   #2
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That's a new one to me lol

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Old 11-12-2015, 12:14 PM   #3
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I have a VMP and no issues with the cats. Don't know if that means anything to you because it's not a Paxton/vortech but boost is boost. Your exhaust is not going to come out with enough pressure to blow out the cats lol


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Old 11-12-2015, 12:20 PM   #4
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Pretty much figured the same thing. Think the guy that was saying this is your typical mechanic that knows it all filled with hot air
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Old 11-12-2015, 12:56 PM   #5
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Back in the old days we would get old T-post from barb wire fences and remove mid pipes from cars and ram those t-post up in there to break up the catalyst. That way it looked stock still and the exhaust would be a lot louder. Plus it was free 😁😁😁


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Old 11-12-2015, 01:40 PM   #6
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You will only have premature problems with the cats if you have a fueling problem and that can happen boosted or not but a sketchy tune with high levels of boost will probably result in more failures. Got to have a good tune period.

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Old 11-13-2015, 04:49 AM   #7
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It can and has happened to a number of guys running their cats while boosted.
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Old 11-13-2015, 07:47 AM   #8
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Never heard of stock cats being a problem, always the high-flow cats that would melt.

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Old 11-13-2015, 08:12 AM   #9
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It was my understanding that much above the 8-10 pound mark is where that usually happens. And. .. usually on turbo as they usually run higher boost.

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Old 11-13-2015, 11:28 AM   #10
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My cats went after ford supercharger and software install. Having said that it appears to have been done by the random misfire issue that has been found. I got dealership to do tsb, then cat codes came and they ended up having to replace both. And as I understand when random misfire is detected, computer adds more fuel. Not sure if I would have done profile learning after supercharger install would have prevented it.
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