Catalytic Converter Question
10-13-14, 10:07 AM
#26
Engine, Not Motor
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Ah, but you can get them close. I tuned a stock port 13B on an MS3X with sequential injection that last year that would idle all day long at around 14:0 once the optimum injector timing was figured out. That's probably close enough not to be too much of a detriment to cat life.
10-13-14, 12:37 PM
#27
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Ah, but you can get them close. I tuned a stock port 13B on an MS3X with sequential injection that last year that would idle all day long at around 14:0 once the optimum injector timing was figured out. That's probably close enough not to be too much of a detriment to cat life.
10-13-14, 07:30 PM
#28
talking head
i have extend port and idle all day at 15.4 :1.. ( lambda 1 for LPG )
and cruise around at 0.95 or better lambda
it is all in how well it stays atomised .. dry gas fuels do not re-condense
would suggest in the petrol rotary it is mostly about getting the angle of injection timing right for you injector positions and airflows
luckily,, i also have a december 85 FC.... and as such it scopes below the law as for the absolute cut off date for manufacture requiring a cat.. which is in oz,, 1st of feb 86
( in those states stipulating build and not compliance dating )
but if i did , i would be fairly confident my lambda feedback system and tune is pretty close to what the cat desires
my biggest worry is having seen 1000 c under load on my EGT , and this would suggest i need to push mine further back
and if doing a test ( im240 or 5 gas ) it would pay to have pre-warmed the engine
btw,, in 2005 during testing with LPG
mine passed the equivalent 5 gas test as would have been expected from a euro 2 standard
- well beyond what a new FC is expected to do
and cruise around at 0.95 or better lambda
it is all in how well it stays atomised .. dry gas fuels do not re-condense
would suggest in the petrol rotary it is mostly about getting the angle of injection timing right for you injector positions and airflows
luckily,, i also have a december 85 FC.... and as such it scopes below the law as for the absolute cut off date for manufacture requiring a cat.. which is in oz,, 1st of feb 86
( in those states stipulating build and not compliance dating )
but if i did , i would be fairly confident my lambda feedback system and tune is pretty close to what the cat desires
my biggest worry is having seen 1000 c under load on my EGT , and this would suggest i need to push mine further back
and if doing a test ( im240 or 5 gas ) it would pay to have pre-warmed the engine
btw,, in 2005 during testing with LPG
mine passed the equivalent 5 gas test as would have been expected from a euro 2 standard
- well beyond what a new FC is expected to do
10-13-14, 09:55 PM
#29
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in California we rate the emissions differently, and we're also given a visual check, as we are mandated to use OEM or specially approved parts only.
in an IM240 county (they are not all), we need to be under .6% CO, about 90 HC's, in parts per million, and about 450 nox's.
somehow these are not absolute numbers, as it varies by weight and something.
our system is basically a lesson in how not to govern. we have a 5 member panel that is only concerned with cleaning the air, and they will poison the water to do it....
in an IM240 county (they are not all), we need to be under .6% CO, about 90 HC's, in parts per million, and about 450 nox's.
somehow these are not absolute numbers, as it varies by weight and something.
our system is basically a lesson in how not to govern. we have a 5 member panel that is only concerned with cleaning the air, and they will poison the water to do it....
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