how much do you trust the dawes afr???
07 February 2002, 02:25 PM
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Yeah, but I'd put the earth in the "wrong" place 
Can't wait to get mapping the MY01 as they have a wideband that might actually be accurate
It is quite amazing - the same fuel map on cars with almost identical mods and working seemingly working lambda sensors can read extraordinarily different.
They are OK for checking ballpark mixtures, but I have lost a lot of confidence in them for mapping, so I just stay conservative with the fuelling. But the occasional sensor takes the pi$$ and makes life very difficult.
Try to tell a customer you are mapping "conservatively" when the lambda sensor suggests 1% CO on full load One poor chap I kept sending away and the third lambda sensor read readings that were more sensible, but sensors that tell lies are a nightmare.
Sadly a rolling road gas probe will arguably not be much more representative because of the different airflows on the rolling road, although at least it would be consistent.
[Edited by john banks - 7/2/2002 2:32:04 PM]
Can't wait to get mapping the MY01 as they have a wideband that might actually be accurate
It is quite amazing - the same fuel map on cars with almost identical mods and working seemingly working lambda sensors can read extraordinarily different.
They are OK for checking ballpark mixtures, but I have lost a lot of confidence in them for mapping, so I just stay conservative with the fuelling. But the occasional sensor takes the pi$$ and makes life very difficult.
Try to tell a customer you are mapping "conservatively" when the lambda sensor suggests 1% CO on full load
One poor chap I kept sending away and the third lambda sensor read readings that were more sensible, but sensors that tell lies are a nightmare.Sadly a rolling road gas probe will arguably not be much more representative because of the different airflows on the rolling road, although at least it would be consistent.
[Edited by john banks - 7/2/2002 2:32:04 PM]
07 February 2002, 03:28 PM
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Yeah, but I'd put the earth in the "wrong" place
[Edited by Katana - 7/2/2002 3:28:42 PM]
01 July 2002, 09:32 PM
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According to the website (dawesdevices.com)
"From 1.0 volts up, the blue light illuminates, indicating that you are very rich, and may want to consider lowering fuel delivery or raising boost for more power"
who then, on fitting an afr & getting the blue light has wound the boost up??
im currently running 18psi fully decat but am a bit doubtfull as to whether to trust it entirely!
youre thoughts/actions please gentlemen
"From 1.0 volts up, the blue light illuminates, indicating that you are very rich, and may want to consider lowering fuel delivery or raising boost for more power"
who then, on fitting an afr & getting the blue light has wound the boost up??
im currently running 18psi fully decat but am a bit doubtfull as to whether to trust it entirely!
youre thoughts/actions please gentlemen
01 July 2002, 09:38 PM
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if you bought the afr through jamie then it will be recalibrated and the blue light is not 1v +. If you dont trust it then simply measue the voltage signal yourself with a voltmeter.
Cheers
Paul
Cheers
Paul
02 July 2002, 02:00 AM
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Did you get the WRX one ?? They have different set points for the LED's. Check Jamie's web site under WRX somewhere and you will get the modified settings (takes a bit of finding )
02 July 2002, 09:30 AM
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Andy - You could try looking under the sections:
Dawes>AFR>WRX
Dodge - rest assured you did indeed get the WRX calibrated AFR.
Jamie
www.j-w-racing.com
Dawes>AFR>WRX
Dodge - rest assured you did indeed get the WRX calibrated AFR.
Jamie
www.j-w-racing.com
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02 July 2002, 01:03 PM
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Jamie
Forgot to say, I had problems with your website links, they wanted to send me a file that I couldn't open ??
http://www.performanceexhausts.net/DawesDevices.html
was an old link I had and it worked ok
Forgot to say, I had problems with your website links, they wanted to send me a file that I couldn't open ??
http://www.performanceexhausts.net/DawesDevices.html
was an old link I had and it worked ok
02 July 2002, 01:07 PM
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Thanks Andy, it's strange that as you are the second person to say the same thing today but I think Ive sorted it now.
Jamie - JW Racing
Jamie - JW Racing
02 July 2002, 02:09 PM
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How much do I trust the AFR?
Depends on the installer. If it was john banks, 100%. If on the other hand it was me or any other people from the muppet forum, 50%.
Depends on the installer. If it was john banks, 100%. If on the other hand it was me or any other people from the muppet forum, 50%.
02 July 2002, 06:33 PM
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Getting the fuelling right is one thing, predicting material tollerences is another. You don't need detonation to ruin an engine. Making it work much harder than what the material can take can also screw your engine up..
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