Cat question
Is there a compelling reason to buy a metal-substrate catalytic converter as opposed to a ceramic substrate converter, assuming they are otherwise "equal?" I'm about to order a hi-flow race cat for my midpipe, and can purchase the Magnaflow I want in either substrate version, the metal being about $40 more. I don't mind the added cost, but only if there is some type of benefit.
The car is daily-driven, autocrossed extensively and will probably see 2-3 track events yearly.
Polished Turd Racing
Mick wrote: "I think Jerrett is the best autocrosser I have ever seen naked."
Ceramic can physically break and blow out, but from a performance perspective they should be on par with one another. A metal core cat can fail, but it will stay put.
The primary cost difference is related to the manufacturing cost of the core more than anything else.
metal tends to be louder and flow better.
Ceramic clogs faster.
Interesting dyno review: http://forums.evolutionm.net/evo-eng...trate-cat.html
From what I've read they tend to be less prone to fail from overly rich conditions (particularly good if you are working out a tune on your car)
2013 Mazda2 slushbox daily
1993 Miata (future exocet donor)
Wonder if there is a point of diminishing returns for me if too little backpressure is present. Don't want to give up too much torque.
Polished Turd Racing
Mick wrote: "I think Jerrett is the best autocrosser I have ever seen naked."
The other issue with ceramic substrate is that sustained high temperature operation (like track days) can break them down really quickly. If they break and clog your exhaust, you can destroy your motor.
For an extra $40, I'd opt for a metal substrate.
What is the CPI (cells per inch) count? The lower the number the better the flow, but extremely low CPI metal substrate cats (like 100 CPI) can sometimes trigger CELs.
Iain
"We don't stop playing because we grow old, we grow old because we stop playing." - George Bernard Shaw
Probably going to go with a 300 cell or one of the heat-shielded magnaflow options:
http://www.amazon.com/Magnaflow-5430...3812397&sr=1-1
Polished Turd Racing
Mick wrote: "I think Jerrett is the best autocrosser I have ever seen naked."
Another cat question...
Did you ever think when you eat Chinese,
It ain't pork or chicken, but a fat siamese?
source: http://www.lyricsondemand.com/w/weir...tlelyrics.html
On the track, I am fearless.
If you were as slow as me, you wouldn't be afraid either.
1994 M Edition
CSP 67
I have ordered the blue ceramic cat pictured above. I will be bringing it to TDR for installation, and it better work!
Polished Turd Racing
Mick wrote: "I think Jerrett is the best autocrosser I have ever seen naked."
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Originally Posted by OZMDD
