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Bug
Fordmods - Getting Side Ways
Age:26
Posts: 467
Joined: 05 Nov 2004
Location: Tweed Heads NSW, Australia
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 Posted: Mon Apr 02, 2007 12:19 pm Post subject: Lpg and cat converters |
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I was told recently not to use a ceramic core cat converter with the combination of headers and lpg but rather get a steel core cat..
Anyone know whats in the standard one? |
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jaikai
Fordmods Stock as a Rock
Age:38
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Location: Morwell VIC, Australia
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| Posted: Mon Apr 02, 2007 10:17 pm Post subject: |
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As far as it goes, a cat does nothing with LPG... however, according to the ADR you need it on a vehicle post Jan86, I`d go the cheapest possible option suited to your needs...(I could say don`t bother but that`d be irresponsible) 
JAIKAI |
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Bug
Fordmods - Getting Side Ways
Age:26
Posts: 467
Joined: 05 Nov 2004
Location: Tweed Heads NSW, Australia
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| Posted: Tue Apr 03, 2007 12:42 am Post subject: |
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Well I still need the cat being a dual fuel system..
The main concern here is the extra heat of headers combined with the extra heat of running gas causes ceramic cats to deathify rather than any emissions reasons.
So a dead (melted/cracked etc) cat is mainly going to be a concern for flow. |
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jaikai
Fordmods Stock as a Rock
Age:38
Posts: 156
Joined: 21 Oct 2006
Location: Morwell VIC, Australia
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| Posted: Tue Apr 03, 2007 7:53 am Post subject: |
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As I said, get the cheapest one that suits your needs, and you only said gas, not dual fuel...get a standard one and you`re set to go, legally too. if it`s a falcon abd you want a bigger system, use a VN cat, bigger pipe, plenty ppl using them on Xseries with 2.5" pipes
JAIKAI |
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twason
Fordmods - Getting Side Ways
Posts: 2092
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Location: Canberra - The Nations Capital ACT, Australia
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| Posted: Tue Apr 03, 2007 8:22 am Post subject: |
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| The factory LPG system for E series purposely richens the mixture under deceleration and a few other conditions to lengthen the life of the CAT. From that it would seem that a straight O2 loop system could be detremental to the life of the CAT. |
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Mr.Kiss
Fordmods - Getting Side Ways
Age:21
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Location: S.E. Melbourne VIC, Australia
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| Posted: Thu Apr 05, 2007 1:23 pm Post subject: |
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Have you ever thought of just gutting the standard cat and putting a 2.5" pipe through the middle of it???
I've "heard from a friend" that it makes the car sound better and flows really good to  |
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Bug
Fordmods - Getting Side Ways
Age:26
Posts: 467
Joined: 05 Nov 2004
Location: Tweed Heads NSW, Australia
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| Posted: Thu Apr 05, 2007 1:48 pm Post subject: |
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| Im actually one of those minorites that thinks a working cat converter is an important thing. I still probably use petrol 1/4 of the time after all.. |
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Macca
Fordmods - Getting Side Ways
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Location: Singleton NSW, Australia
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| Posted: Thu Apr 05, 2007 8:40 pm Post subject: |
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| twason wrote: | | The factory LPG system for E series purposely richens the mixture under deceleration and a few other conditions to lengthen the life of the CAT. From that it would seem that a straight O2 loop system could be detremental to the life of the CAT. |
Did you get that info from the Tickford LPG supplement?
To me that sounds wrong as that may introduce unburnt LPG into the converter, that in turn WILL destroy it if it happens for to long. |
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Bug
Fordmods - Getting Side Ways
Age:26
Posts: 467
Joined: 05 Nov 2004
Location: Tweed Heads NSW, Australia
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| Posted: Thu Apr 05, 2007 9:26 pm Post subject: |
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| Yea that kinda behaviour sounds like it would promote backfiring as well... |
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