Fueling your thoughts(with power charts)
16-02-2006, 10:56 AM
#53
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Originally Posted by Stu @ M Developments
60 trim T3s are a bit large for a 1.45 litre 3 cylinder engine IMO.
16-02-2006, 01:20 PM
#58
Very promising graph, definately lots of potential there once its mapped properly 
If mapping with a probe up your exhuast be careful that the exhaust isnt drawing in oxygen.
I checked the fuelling over on Doug Stirlings car recently, then Karl did the same thing, but he put the probe up the exhaust instead of in the manifold like i did it.
My conclusion was the car fuelled pretty much perfectly, Karls conclusion was that it was badly under fuelling and running very lean.
The only reason he got that misreading was the exhaust had a bad leak in it, this was an extreme case as a previous owner had deliberately slotted the exhaust to draw more air from outside in to make the flamer kit work better, but it highlights the point im making very well.
So possibly if this car was mapped from the exhaust, it may be a similar problem
If mapping with a probe up your exhuast be careful that the exhaust isnt drawing in oxygen.
I checked the fuelling over on Doug Stirlings car recently, then Karl did the same thing, but he put the probe up the exhaust instead of in the manifold like i did it.
My conclusion was the car fuelled pretty much perfectly, Karls conclusion was that it was badly under fuelling and running very lean.
The only reason he got that misreading was the exhaust had a bad leak in it, this was an extreme case as a previous owner had deliberately slotted the exhaust to draw more air from outside in to make the flamer kit work better, but it highlights the point im making very well.
So possibly if this car was mapped from the exhaust, it may be a similar problem
16-02-2006, 01:28 PM
#59
Whilst i see what your saying chip, i donty see any way the reading could be too RICH in the tailpipe scenario, extraction issues aside...
Incidentally...
The scenario above is precisely why i use my Ł7000 ECM AFR unit, it detects neat oxygen, thus warning me of a leak.
Incidentally...
The scenario above is precisely why i use my Ł7000 ECM AFR unit, it detects neat oxygen, thus warning me of a leak.
16-02-2006, 01:32 PM
#60
Originally Posted by Stu @ M Developments
Whilst i see what your saying chip, i donty see any way the reading could be too RICH in the tailpipe scenario, extraction issues aside...
Incidentally...
The scenario above is precisely why i use my Ł7000 ECM AFR unit, it detects neat oxygen, thus warning me of a leak.
Incidentally...
The scenario above is precisely why i use my Ł7000 ECM AFR unit, it detects neat oxygen, thus warning me of a leak.
I suspect your kit is a LOT more sophisticated than most of the other mappers out there mate!
16-02-2006, 01:38 PM
#62
Originally Posted by chip-3door
Mapped with a blowing exhaust, exhaust fixed, put on rollers = Too RICH
(please dont say off fitz
16-02-2006, 01:48 PM
#68
Professional Waffler
)
And you base that comment on?
the catalist in the middle 
(joking BTW 
)
Originally Posted by Stu @ M Developments
Originally Posted by ThomasRC
You will always see a leaner mixture from the tail pipe than right up close to the turbo.
(joking BTW )
16-02-2006, 01:49 PM
#69
Originally Posted by Stu @ M Developments
Originally Posted by chip-3door
Mapped with a blowing exhaust, exhaust fixed, put on rollers = Too RICH
16-02-2006, 01:50 PM
#70
Originally Posted by Stu @ M Developments
Originally Posted by ThomasRC
You will always see a leaner mixture from the tail pipe than right up close to the turbo.
16-02-2006, 01:52 PM
#71
Originally Posted by GARETH T
)
And you base that comment on?
the catalist in the middle (joking BTW )
Originally Posted by Stu @ M Developments
Originally Posted by ThomasRC
You will always see a leaner mixture from the tail pipe than right up close to the turbo.
(joking BTW ) 
16-02-2006, 01:55 PM
#72
Originally Posted by Stu @ M Developments
Originally Posted by GARETH T
)
And you base that comment on?
the catalist in the middle (joking BTW )
Originally Posted by Stu @ M Developments
Originally Posted by ThomasRC
You will always see a leaner mixture from the tail pipe than right up close to the turbo.
(joking BTW ) Acutally, the catalyst DOES effect the oxygen reading i would expect lads.
Think about it
16-02-2006, 01:56 PM
#73
Gareth is joking Chip, if the car has one or more cats we sample prior, end of. However, at high pressure levels the cat does virtually fuck all, but sadly, most of my mapping is for driveability so its another political arse introduced into my job as at low speeds there shit all left to read.
16-02-2006, 02:54 PM
#77
10K+ Poster!!
That engine is like my mini's!!!!
WAY over rich (mine was running 10 or 9:1 !!!
And its got a huge t3 on 1275cc... but atleast its got one more cylinder! lol
Alex
WAY over rich (mine was running 10 or 9:1 !!!
And its got a huge t3 on 1275cc... but atleast its got one more cylinder! lol
Alex
16-02-2006, 03:10 PM
#78
Originally Posted by J871yhk
That engine is like my mini's!!!!
WAY over rich (mine was running 10 or 9:1 !!!
And its got a huge t3 on 1275cc... but atleast its got one more cylinder! lol
Alex
WAY over rich (mine was running 10 or 9:1 !!!
And its got a huge t3 on 1275cc... but atleast its got one more cylinder! lol
Alex
and 1 less port
16-02-2006, 09:08 PM
#80
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i have full time wideband in my Zetec turbo and its high compression (9.5:1) and runs .82 lambda at 15psi so its probably going to melt somthing soon
also just a note i have seen cars mapped with the lambda shoved up the exhaust and then done more mapping later but with the lambda screwed in to the down pipe and it reads alot richer than before
also just a note i have seen cars mapped with the lambda shoved up the exhaust and then done more mapping later but with the lambda screwed in to the down pipe and it reads alot richer than before