I'm not sure if anyone has posted this up before (is this the link Doug posted up ages ago?), but came across this:

 

Tech Edge

google for "diy-wb" if you don't like paying money :)

yup, thats the one.

 

i use the fuel mixture display kit in standard narrow band mode. still is an awesome tuning aid for NA carbed engines. wouldn't worry to much about a wideband setup unless you have a hot turbo setup and a programmable computer.

they say the jaycar kit is designed for a certain sensor, but will work with other sensors if you "calibrate it". not having an AFR meter or a dyno shop or an efi car to do this with, is the difference really that great?

Another kit

 

I've got a Jaycar one, but the one that uses LED's (instead of the readout). I have absolutely no idea how accurate/inaccurate mine is, I suspect the latter is more correct.

so slow it don't go!

If anyone is interested, John at ImportBitz sells the Innovate Motorsports LM-1 kit for $595.

 

http://www.importbitz.com/electronicnew.htm