Boost=Failingt cats

[Harry08]

Anyone have any idea at what boost # or HP will aftermarket cats begin failing? Thanks in advance.

 

[me32]

600hp plus and boost 17psi. Plus

 

[Imatk]

Mine died at 530rwhp but that was on a Mustang Dyno

 

[Ghoust]

A buddy of min'es cats failed around 650hp.

 

[VNMOUS1]

I love cat fails.

https://www.youtube.com/watch?v=nINuDXRsi0E

 

[Harry08]

Nice cats!

 

[Goose17]

No hard numbers. Depends on if your tune is aggressive or has cat protections.

 

[Stri8ed]

I agree with the previous posts. You can get more life out of them if you ensure your tuner has the CAT protector turned on.

 

[Imatk]

Lund tune, CAT protection on for me.

 

[gmcconn1]

Yep, excessive heat kills cats at any HP level. At the OEM level we try to keep cat temps under 950 deg C. Most tuning shops do not use temp thermocouples though so a lot of times it can be a shot in the dark because cat protection is modeled in the ECU. I have seen A/F as rich as 0.70 lambda to keep the temps down and I'm sure there are some applications that will go even richer.