Anyone run a performance catalytic converter?

[djcdmv]

Just wondering if anyone runs a performance or high flow cat on their car. Not thrilled with my cat delete, but my cat is cloggged. Was thinking of buying a universal performance cat and welding to my cat delete. Any opinions? Thanks!

[tirwin]

Define "performance". Are you talking something like Magnaflow or something like a sport cat?

I recently asked the same question. Didn't get many responses. Definitely interested in hearing from others.

[KFC911]

Euro premuffler is the way to go for performance...I have a Fabspeed on mine.

[djcdmv]

Like many others have said in cat delete threads, can't stand the smell of cat deletes/pre-mufflers.
Saw an inexpensive Magnaflow universal cat that I was thinking of having a friend weld to my cat delete pipe.

[Joe Bob]

I run a single sport cat on my 3.6 conversion. 993 HEs, Y pipe to a collector, 3inch inlet cat, spiral type....looks like a small "cheery bomb" muffler to a single outlet.

[KFC911]

Originally Posted by djcdmv

Like many others have said in cat delete threads, can't stand the smell of cat deletes/pre-mufflers.

I know the smell you are referring to...I've never smelled that with mine???

[djcdmv]

Originally Posted by Joe Bob

I run a single sport cat on my 3.6 conversion. 993 HEs, Y pipe to a collector, 3inch inlet cat, spiral type....looks like a small "cheery bomb" muffler to a single outlet.

trade ya for my clogged cat

[RarlyL8]

If your exhaust smells after the cat is removed you need to adjust your idle mixture. No reason at all for a cat-less engine to smell any more/less than any other engine that never had a cat.

[KFC911]

Originally Posted by RarlyL8

If your exhaust smells after the cat is removed you need to adjust your idle mixture. No reason at all for a cat-less engine to smell any more/less than any other engine that never had a cat.

Nice to know...I reckon my mixture is fine. All Porsches (and Harleys) don't leak oil either ! I've had my Fabspeed premuffler (and GHL muffler) for a long time, before other options were available. I've been very pleased, but If I were shopping now, I'd sure be looking at M&K solutions...

[NY65912]

I ran a performance cat for a while but switched to a Euro Pre-muffler. I can't really say if there was any gain in performance or not.

I am planning on putting the cat in the for sale section as soon as I dig it out of the shed if anyone is interested.

[RarlyL8]

Which performance cat did you use? It would be interesting to measure how well the cat works (as a cat) versus performance. There is no performance difference in a pre-muffler versus bypass as both are open straight through, only noise level.

[djcdmv]

Originally Posted by RarlyL8

If your exhaust smells after the cat is removed you need to adjust your idle mixture. No reason at all for a cat-less engine to smell any more/less than any other engine that never had a cat.

OK, newbie alert, how do I adjust the idle mixture? Thanks!

Plus, Brian, if you answer now, you will reach the coveted 10,000 posts!!!