Ok, this is just pure horseshit. Youre NOT going to burn your cat up unless youre running 9.5 or lower at your A/F ratio. If you want to talk about a rich running motor, take a look at my Lightning. It has a fuel system that supports 1100 hp, 3 fuel pumps, a kenny bell blower pumping out 18 psi on the street, backed up by meth injection. On the street i run a conservative 10.8 AF... mild street program runs 11.1... race settings are 12.1 on 114 octane. Five years, 1400+ 1/4 passes and 59,000 on the odometer, the cats and exhaust are fine.
A BOV isnt going to cause that severe of a rich condition. Hell if anything, venting to the atmosphere is actually going to LEAN you out when you bring in unmetered air. Some tuners used to place a vent filter to the valve cover on the lightnings in the earlier years of tuning.. They would have to adjust for it because of the unmetered air bumping the a/f .4 to .6 above what the dyno run would put out.
For the dude who is or was a dealer mechanic, things have changed since you have been trained, esp with boosted motors... Its either time you learn how it works or just stay out of these threads. Youre giving out information that isnt factual and based off knowledge of non forced inducted vehicles which have no merit to this type of car.
If you want to burn out a cat, run it lean... If you dont believe me, go talk to the Sub STi Race team who had to goto magnaflow to get a special cat made for their race cars to solve the problem. Running rich 10.5 and above isnt going to do a damn thing to it. MOST boosted cars from the factory run 10.2 to compensate for high altitudes amd high heat climate areas.
