Buy, Build & Use A Tech Edge A/f Ratio Meter

[Sydneykid]

Got any further with this SK? Ive been looking for another kit to build, as ive just finished my last

Looking forward to seeing how this comes out....

<{POST_SNAPBACK}>

Yep, I installed all of the resistors on the 2A1 PCB last night, tonight I might finish the rest of the components.

cheers

[KamikazeR33]

gary im just trying to work out but am i right in assuming the inputs go to the ecu? (not electronically minded)\

it prob says all this in the instructions anyway....

[Sydneykid]

gary im just trying to work out but am i right in assuming the inputs go to the ecu?  (not electronically minded)\

it prob says all this in the instructions anyway....

<{POST_SNAPBACK}>

The only inputs to the TE 2A1 I am going to use (other than the F&W lambda sensor of course) is rpm and AFM voltage. Both of those are available at the pins on the ECU plug.

Did that answer your question?

chers

[KamikazeR33]

yep as always

[KamikazeR33]

just as another question, if not running an afm which input would you connect to?

[Sydneykid]

just as another question, if not running an afm which input would you connect to?

<{POST_SNAPBACK}>

Whatever the other (than rpm) axis is on the ignition and fuel maps, I would assume that's MAP sensor. What you are trying to do is to have logs that tell you what changes to make in your maps to achieve the target A/F ratios. So it makes sense to me to use the relevant maps axis in the logging. I just reckon it is easier that way.

cheers

[Sydneykid]

Quick update, finished building the kit last night;

As usual once I got past the tedious resistor installs, the rest was easy. Now it is just a matter of testing it, then it will be ready for use. More updates shortly.

cheers

Edited June 20, 2006 by Sydneykid

[Beer Baron]

am i right in saying that you need to solder each one of those little witchety grub looking things onto the board? how long do you reckon it took to build?

looks very neat though.

[Bl4cK32]

Looks great

Keep the updates coming....

[Duncan]

Richard, you can also buy it as a prebuilt kit about $100 more

[Gav]

SK - some questions on the lambda sensor:

Where would you recommend the sensor be placed for a GT-R?

Given the relatively cheap cost of the sensors, it ist advantageous to use more then one (eg. one for each "branch" on the front pipes)?

Can the meter monitor/log more than one sensor?

Does your sensor use a standard spark plug bung?

Sorry about all the questions, but I'm very interested given the relatively low cost compared to the valuable information that these can provide.

Cheers

Gav

[Sydneykid]

SK - some questions on the lambda sensor:

1. Where would you recommend the sensor be placed for a GT-R?

2. Given the relatively cheap cost of the sensors, it ist advantageous to use more then one (eg. one for each "branch" on the front pipes)?

3. Can the meter monitor/log more than one sensor?

4. Does your sensor use a standard spark plug bung?

Sorry about all the questions, but I'm very interested given the relatively low cost compared to the valuable information that these can provide.

Cheers

Gav

<{POST_SNAPBACK}>

Hi Gav, suggestion to your questions follow;

1. The closer to the turbine outlet the quicker the response to changes in A/F ratio. ie; make a change and see the result instantly. The further away from the tailpipe the less likely to get ambient air contamination, which can be a problem at low airflows with big exhaust outlets. We have the F&W lambda sensor on the race cars just after where the engine pipes join. No ambient air contamination and very fast response, as fast as the lambda sensor itself in fact.

2. Nope, waste of money I reckon. We do have 4 X lambda sensors on the engine dyno for tuning the SuperTourer engines. But 2 on 6 cylinders, I can't see much of an advantage.

3. Not that I can see

4. Standard lambda sensor bung

Hope that answered your questions

Cheers

Edited November 1, 2005 by Sydneykid

[Beer Baron]

Richard, you can also buy it as a prebuilt kit about $100 more

<{POST_SNAPBACK}>

hmmm, maybe team Rice and Team Raceworx should chip in and buy one?

[Gav]

Thanks SK for the fast response - will watch your results with interest

[Duncan]

yeah we've got one on the way atm I need to catch those guys so I have decided to tune the computer

[clayoth]

I have been using an LM-1 for about a year on a WRX semi-race car. It has been reliable and very helpful. I log the 0-5 volts to a Race Technology DL1, when I remember to turn it on (about 50% success rate on that ).

Edited November 3, 2005 by clayoth

[Sydneykid]

I have been using an LM-1 for about a year on a WRX semi-race car.  It has been reliable and very helpful.  I log the 0-5 volts to a Race Technology DL1, when I remember to turn it on (about 50% success rate on that ).

<{POST_SNAPBACK}>

What sort of stuff have you picked up? On the race cars I keep finding little areas on the maps (load/rpm) where I can tidy up the A/F ratios. I reckon I have changed about 800 of the 1200 load points on the Motec. Most only by small increments, some by more than I would have anticipated was possible.

Next year I am going to spend a lot less time on race team stuff and more time on my own cars. Using the Datalogit, I am hoping to do similar with the knock sensor readings and the ignition timing. I reckon that there is a heap of time to be had from improving the response through the whole rpm range with fuel trim and ignition advance. Stuff that you can't do on the dyno, well I guess you could, but it would take days and cost a bomb.

cheers

PS; no progress on the Tech Edge kit yesterday or today as I have been helping to get a number of Group Buy suspension kits out. Saturday I am out at the A1 GP, so it might be early next week before I can get back to finish it.

[Oosh]

Slightly OT I know, but further on from talking about A/F logging to adjust tuning, are there any aftermarket ECU's that use wideband O2 sensors as a major imput ala Porsche OEM style?

[Sydneykid]

Slightly OT I know, but further on from talking about A/F logging to adjust tuning, are there any aftermarket ECU's that use wideband O2 sensors as a major imput ala Porsche OEM style?

<{POST_SNAPBACK}>

Both Motec and Autronic have "self tune" using an F&W lambda sensor. You basically input a target A/F ratio and they adjust the fuel maps to it as you drive. For example 2 laps of Bathurst to tune a Mazda 2.5litre V6 starting with simple basic maps. If I remember rightly the Electromotive also does similar.

I haven't seen one that does ignition timing based on a knock sensor input, yet. Now that would complete the self tune picture and turn dynos into dynosaurs.

cheers

[PHaT MR30]

how is yours comming along SK?