Not a bad set of numbers from the CA18DET. and interesting tuning information Andrew
----- Original Message ----- From: "andrew smith" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Saturday, 27 July 2002 23:55 PM Subject: Re: air fuel ratio meters > A mate just fitted a CA18det into an MGF using a microtech which gives a > numerical read out of the A/F ratio and will also data log the figures.He also > had a jaycar type led meter both of which use narrow band sensors.Before we > started tuning we calibated it against his $10,000 workshop CO tester.We simply > held the motor at a constant rpm and adjusted the injector pulse width up and > down the scale and compared the numbers/lights so we knew where we were.The > numbers on the microtech were very accurate and after some adjusting of the pot > the jaycar sat smack in the middle while the others were on 14.7.We then did a > few hours of road tuning getting things right.With the data logging you can > check out any to rich and to lean spots compare them to the map/rpm and adjust > accordingly.The full boost runs were checking out well so it was time to hit the > dyno for some fine tuning for max torque.With the wide band ntk sensor in place > everything checked out the same as the microtech a/f readings.Dyno time was 1 > hour and cost $70.The little beast made 214rwhp running 10-12 psi.The injector > duty cycle was nearly maxing out otherwise we would have put more boost into > it.The first run on the dyno with only street tuning we got 209rwhp.The only > mods to the motor was a t25g turbo with a hiflow t28 wheel and 20b > intercooler.The mg nuts nearly have a heart attack when they see a nissan motor > in an mg.Sorry to ramble on. > > Daniel Kroehn wrote: > > > As far as I've been told, they are more of a gimmick than an accurate tool. > > My mate has the Jaycar kit. Not the LED one, its the one that actually > > displays the air/fuel ratio as a number. He hooked it up to his O2 sensor. > > This step is important: You then must have it calibrated against a > > professional air/fuel ratio meter. Once this is done it works really well. > > It is just as accurate the professional machines for a fraction of the cost. > > But as I said only if you have it calibrated against a professional meter. > > > > cheers > > > > Daniel Kroehn > > > > ----- Original Message ----- > > From: "James Fitness" <[EMAIL PROTECTED]> > > To: "membersozdat" <[EMAIL PROTECTED]> > > Sent: Friday, July 26, 2002 10:31 PM > > Subject: air fuel ratio meters > > > > > Hi All > > > > > > further to our discussion the other week about air fuel ratio meters.. > > > I noticed this in the latest Autobarn sale catalog > > > > > > Auto Meter air fuel ratio meter > > > Part No. AU3375 @$ 137 > > > So I looked it up on the Auto Meter website and came > > > up with the following page:- > > > http://www.autometer.com/hp/2001_catalog/competition/46.html > > > > > > Apparently it works with most O2 sensors, but they also sell a > > > Oxygen Sensor Kit (includes sensor,weather pack harness, > > > and weld fitting). > > > no idea of the price of the O2 sensor kit as yet, but I will find out... > > > > > > There is also a bit of a page explaining it further in their Tech > > > Tips/FAQ Pages. > > > titled - "Air/Fuel Ratio gauges and Oxygen Sensor operation explained." > > > > > > > > > could be worth a further look at that price.... > > > anybody tried one of these (autometer ones) ?? > > > > > > cya > > > James > > > > > > > > > -- > > > ________________________________________________________________________ > > > > > > James Fitness > > > Director > > > Data Scribe Australia Pty Ltd > > > http://www.datascribe.com.au > > > Computers and Supplies > > > > > > OZDAT Online > > > http://www.ozdat.com/ozdatonline/index.htm > > > > > > > > > > --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]/ ---------------------------------------------------------------------
