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Should I Replace My Compliance Cat? And With Which Cat?

some_cs_student
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some_cs_student Veteran

some_cs_student

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so its a bad idea to have a ceramic cat. yet nissan thought it was a good idea to have ceramic exhaust wheel's on turbo's...

:)

Ok statement withdrawn :). I was told this but I don't know how true it is, it was something I was told rather than one of my theory's..

The idea was along the lines of GTR's run rich and the ceramic inside's wear out easier while a steel inside will last longer.

I'm not in the know when it comes to cat converters so I'll let other people advise me on this one :banana:

GeeTR Grand Master

GeeTR

Posted
Posted (edited)
Ok statement withdrawn :) ... I was told this but I don't know how true it is, it was something I was told rather than one of my theory's..

The idea was along the lines of GTR's run rich and the ceramic inside's wear out easier while a steel inside will last longer.

I'm not in the know when it comes to cat converters so I'll let other people advise me on this one :)

Tis cool, as long as your sure to mention its something "you heard from a mechanic"... I tend to ignore anything a normal, non-performance mech says (no offence mech's: 3 mates a mechanics)

Correct, ceramic cats are more sensitive to heat, so if your cats running in a hot environment (miss tuned piston or normal rota) iv found you need to grab a better quality one (unfortunately most ppls look at max CFM only)

All i can recommend in these high temp applications is SMB. Many of the Rotary crew use em cus they are a lot more resilient to heat. Purely as a "I know a guy..." story, a mates, mate fitted a SMB 4" to a 13B, GT3540 running 10.3 AFR's ALL THE TIME, not just on boost. Within months the cat ended up in his rear muffler. He's purchasing another in a week or two.

SMB has proven itself in my eyes, in very hot environments; if many other decently tuned rota's (10-11 AFR on boost) have surviving SMB cats... then its good enough for my properly tuned piston car I figure.

EDIT: My post is meaningless of course to those looking to grab the most cost effective solutoin for thier setup. BOS import cats seem to last well anough on properally tuned cars. Check the for sale section.

My fist full of cents...

Edited by GeeTR

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