Mark, The haltuner only uses a 4 wire narrow band sensor and is really only for keeping an eye on mixtures it is not really suitable for tuning a turbocharged engine on boost as narrow band sensors dont read low enough accurately.Any of the other kits like the jaycar one will do the same thing but dont use the heated sensor so the car needs to be warm to get an accurate reading.The haltuner sensor can be fitted into the exhaust manifold and works best there.To get accurate readings that you can tune a turbocharged engine with you need to use a wide band sensor with the right hardware.Have a read on this site for a better understanding. http://www.techedge.com.au/vehicle/wbo2/default.htm
Mark wrote: > Short question: What's the best way to analyse A/F ratio for tuning > purposes? > > Long version: > > I want to monitor the A/F mixture on an FJ20 Turbo with a Haltech F9 > EMS. I was looking at the "Haltuner" on the Haltech www which appears > to be a LED meter and the sensor is clipped on the exahaust pipe on the > rear - local distributor in Canberra said the fresh air or clean air? > sensor can be unreliable in this set-up (i don't fully understand what > he was saying and assumed there is a fresh air measurment used to > compare to the exhaust gas measurement? and the fresh air one sucks in > exhaust which fouls its readings?) > > I was wondering about the factory exhaust sensor - if it works like my > other haltech sensors then could I measure resistance from it? Problem > is knowing what they meant and without its specs I tuning blind. The > workshop said I can use this exhaust sensor, but i wonder would it be > calibrated to suit a Haltech? In any case the $330 upgrade to the F9A > would give me closed-loop exhaust sensing, but this still doesn't allow > full tuning as it's only a trim adjustment on existing fuel maps. > However if this close-loop system is reporting the mixtures to the > datalogging mode of the software then it is what I'm looking for. > --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/[EMAIL PROTECTED]/ ---------------------------------------------------------------------
