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HIGH FLOW CATS - CERAMIC VS STAINLESS 

 

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 Post subject: HIGH FLOW CATS - CERAMIC VS STAINLESS
Posted: Tue Oct 16, 2007 9:11 pm 
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Whats the difference between the two. Ive been told the stainless have 3 times the size holes that ceramic ones have. I'll be getting the stainless but wanted to know if they really flow better than ceramic to justify the price. $400 ea

 

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Posted: Tue Oct 16, 2007 9:56 pm 
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I hae a Supercat S/S. There is no noticeable power loss over no cat at all, it also sounds better.

 

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Posted: Tue Oct 16, 2007 10:00 pm 
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No difference in my opinion.

Have you seen the inside of a cat in good condition? They dont really look like theyre gonna flow any better than they already do, apart from larger diameter flanges.
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Posted: Tue Oct 16, 2007 10:27 pm 
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I've been told by 4 exhaust shops that the stainless flow heaps better than any original. One also said there's no point doing the whole system if your not going to replace the most restrictive part of the exhaust, which makes sense. Ive read on here that the standard ones are good, but everyone i talk to say's different.

 

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Posted: Tue Oct 16, 2007 10:38 pm 
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I had the standard CAT on my system for a while, with my pacemakers and the full exhaust. When i put the S/S CAT on it made it heaps louder but i couldn't really tell any difference in power. Maybe on the dyno it would show an increse

 

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Posted: Tue Oct 16, 2007 11:39 pm 
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Take the magnaflow metal cat, best option.

Don't pay ~400 though, the place I got my extractors fitted wanted 380, got it for 220 off ebay.

Fitted today, it's great :)
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Posted: Wed Oct 17, 2007 7:53 pm 
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Darkr wrote:
Take the magnaflow metal cat, best option.

Don't pay ~400 though, the place I got my extractors fitted wanted 380, got it for 220 off ebay.

Fitted today, it's great :)
You're right, $220 from ebay. Used that to bargain down the zorst shop. Thanks

 

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Posted: Wed Oct 17, 2007 8:22 pm 
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Surely the ss vs ceramic also varies depending on the brands?
Or are all high flow cats stainless and all factory cats/stadnard cats ceramic?

 

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Posted: Wed Oct 17, 2007 10:09 pm 
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twr7cx wrote:
Surely the ss vs ceramic also varies depending on the brands?
Or are all high flow cats stainless and all factory cats/stadnard cats ceramic?
You can get high flow ceramics.

 

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Posted: Wed Oct 17, 2007 11:55 pm 
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The CAT i have is a German brand, Zuna-Starker, has ceramic internals and S/S outer.

 

 

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Posted: Thu Oct 18, 2007 12:04 am 
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Also the ones with stainless insides dont break up as fast as the ceramic ones do. I'm running the stainless "metalcat/xforce" ones on mine.

 

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Posted: Thu Oct 18, 2007 12:16 am 
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I have seen one of those melt and block up the exhaust.

 

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Posted: Thu Oct 18, 2007 12:40 am 
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cjh wrote:
I have seen one of those melt and block up the exhaust.


Shocking state of tune? That'll kill any cat.

 

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Posted: Thu Oct 18, 2007 3:11 am 
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XH5LWEPN wrote:
cjh wrote:
I have seen one of those melt and block up the exhaust.


Shocking state of tune? That'll kill any cat.
my stock cat was absolutely hollw when i pulled her down after 4 years of having my engine worked over time... :lol: -And it was not me that did it!! :shock:

 

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Posted: Thu Oct 18, 2007 12:19 pm 
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XH5LWEPN wrote:
cjh wrote:
I have seen one of those melt and block up the exhaust.


Shocking state of tune? That'll kill any cat.


It was on a turbo Rotary RX7, an import model, with a twin 3" exhaust. Before the CAT blocked up, it was doing 10.2sec 1/4's on street tyres as run on the street.

 

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