Catalytic Converters & Boost.. Disaster waiting to happen? (Street / Strip )

[Jackson1320]

I blew my engine the day after I got my supercharger installed because my cats melted. They were bbk high flow cats. I would definitely get rid of them if I were you.

how is that possible

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[Jackson1320]

I blew my engine the day after I got my supercharger installed because my cats melted. They were bbk high flow cats. I would definitely get rid of them if I were you.

not saying it's impossible. but how? i could see bending valves but i don't call that blown

 

[Kennysum1]

not saying it's impossible but how

cats melted and exhaust no longer had anywhere to go. happens under high loads on boosted cars. insane amounts of heat then gets shoved back into the engine and just melts it.

If you are going boosted take the cats off or go NA/low boost and be very aware no long hard pulls or repeated pulls

 

[Jackson1320]

cats melted and exhaust no longer had anywhere to go. happens under high loads on boosted cars. insane amounts of heat then gets shoved back into the engine and just melts it.

If you are going boosted take the cats off or go NA/low boost and be very aware no long hard pulls or repeated pulls

ok. so they melted during a hard pull and boom

 

[Jackson1320]

if i live where they smog test(because not all of california does) i remove cats and reinstall for testing then remove again

 

[DougS550]

What cats are the GT500 OR hellcats use? Can you just buy those and install? Are the OEMs not stamped?

 

[Angrey]

What cats are the GT500 OR hellcats use? Can you just buy those and install? Are the OEMs not stamped?

It's a swift kick in the crotch if you want to buy both sides.

Ford Mustang Converter. Catalytic. Cnvrtr. Mustang; 5.2l - KR3Z5E212C | Lakeland Ford Online Parts, Lakeland FL

 

[K4fxd]

has to have a C.A.R.B number or a E.O number

More proof it is not about clean air. If it passes the sniff test it should pass, even with no cats.

 

[engineermike]

What cats are the GT500 OR hellcats use? Can you just buy those and install? Are the OEMs not stamped?

I believe them to be ceramic substrate like the stock mustang gt, just larger.

I discussed this on the other cat thread but the hellcat has programming to limit temperature rate-of-change/thermal shock. The gt500 goes into cot (<0.7 lambda) about 2 seconds after going wot.

 

[2022 Mach 1]

More proof it is not about clean air. If it passes the sniff test it should pass, even with no cats.

We don't sniff test odb2 cars. A visual inspection that nothing has been modified or if it has the proper EO is in place. Then a scanner is placed on the odb port to check for smog readiness and if an aftermarket tune as been installed. That's the major issue here in CA.

 

[K4fxd]

We don't sniff test odb2 cars

If it was about clean air they would sniff test. If it passes you should be good to go even if it passed with no cats.

 

[AvalancheSVT]

These are the only cats i would run on an aftermarket boosted car.

https://www.siliconeintakes.com/dsm-intercooler-piping/high-flow-cat-p-573.html

 

[Mspider]

We don't sniff test odb2 cars. A visual inspection that nothing has been modified or if it has the proper EO is in place. Then a scanner is placed on the odb port to check for smog readiness and if an aftermarket tune as been installed. That's the major issue here in CA.

So would gutting the factory cats but keeping them looking like stock work? Maybe also clear engine codes before you go in.

 

[2022 Mach 1]

So would gutting the factory cats but keeping them looking like stock work? Maybe also clear engine codes before you go in.

You could gut them but it would trip the dreaded p0420 p0430 cats below threshold failing you. Clearing the codes would need the ecu to reset to inspection ready which takes either a set amount of key cycles or miles driven. If the issue hasn't been retified the cel would trip again failing you

 

[AvalancheSVT]

they make o2 sensor adapters that have a little cat in em, BTW, that just filters the air the O2 sensor reads as it flows through the open pipe

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