[urq] AF meter[was What cause overboost ? ]

[Ben Swann]

That's the one I was going to get - sometimes JCW has something worthwhile.
Just seeing if there was anything comparable for about the same $$.

Ben

-----Original Message-----
From: tlum at flash.net [mailto:tlum at flash.net] 
Sent: Wednesday, March 08, 2006 4:17 PM
To: benswann at comcast.net
Subject: Re: [urq] What cause overboost ?

Ben,

JC Whitney has a Intelletronix unit for about $39.  These meters are really
0-1000mV meters in ten segments.  As a voltmeter, they're really
accurate-I've checked them on a voltage standard.  They're all based on a
National Semiconductor IC.  If a A/F has ten or 20 segments, you can bet its
a NS IC doing the conversion.  In theory if the O2 is seeing stoich, then it
will output 500mV which is half on the gauge.  On my 5kcstq, its fascinating
to watch the ecu change mixture.  It looks almost like a heart beat monitor.

HTH,

Tony
'83 urquattro #302
'87 5kcstq

[YOu need to have a Air/Fuel gauge, I keep telling people that this is very
important tool for turbo engines.  I had one fuel distributor running out of
fuel at 7psi, wouldn't have known that without the gauge.

 

Hope this helps.

Martin]