Hondata

i'm having a bit of trouble finding where to input my voltage vs afr for my zeitronix wideband.

right now i have it wired to d10, when i go to input the voltage vs afr, i only have 3 boxes to plot the curve. if i go into settings > analog input, i can't choose the d10 pin.

what i dont get either is that it appears that earlier versions of the smanager seemed much easier to input the voltage vs afr and choose d10 as your input.



how do i go about inputing my voltage vs afr? do i just fill in the three boxes using the beginning/middle/end of the afr curve and the ecu takes car of the rest?

http://www.hondata.com/techplxwiring.html

The image you have posted is from the old software. It is now done in the Parameters.

i am aware that the image is the old software, that was part of my question. why were there so many boxes to plot the afr vs voltage, and now there is only 3?

Now, in my case... would it be be better to use the analog input, where there is 22 points of reference starting at .15v and ending at 3.27v, using only 3 of these(beg/middle/end) or would it be better to use the linear ouptut where AFR=2xV+9.6 and plot the 3 points with that.

thanks Spunkster!

As long as it uses a linear output you only need 2 points to correctly plot the voltage vs. AF.

ok perfect.

as far as the 2 points go i take it i only need the beginning and end?

ie; 0 volts 2x0+9.6=9.6AFR & 5 Volts 2x5+9.6=19.6AFR?

one more thing, i have the pr4 ecu. which jumpers do i need to cut for the d10 pin to read afr correctly? r136?

You may not need to cut anything. Connect it first and see if it works.

ok will do.

was i correct in my thinking about which points to enter?

it would be reaaaalllllyyyyy awesome if there was a drop down menu for some of the different widebands.


i like the convenience of the scaling done in the parameters now, however i use a FJO wideband on the dyno which is not a linear scale, which is kind of a kick in the nuts

i agree... just think spunkster, you wouldnt have to answer all these wideband questions :lol:

turbo-charged do you just use one of the analog inputs to plot your FJO?

An easier calibration menu sounds like a great idea.

Derek will identify with our problem with this car - it's his old CRX SiR. It took about 8 years for the alloy front pulley to finally get round to destroying the B16A oil pump gears. It's now running a freshly rebuilt B18C, and the old, prototype Hondata system has been replaced with a nice, new S300. Derek's long-secondary exhaust and re-timed B16B cams made the old B16A remarkably torquey before, but with the B18C it now has huge torque at 6000. Couple that with an ATS gearkit and you have a fantastic little rally car.
Anyway, we want to datalog the A/F ratio on the CRX, and we just happen to have a JDM Type-R DC5 sitting in the workshop waiting for some new suspension, so we thought why not just take the front 'semi-wide-band' O2 sensor from the Integra and simply plug it in? The wiring is the same, and even the plug just plugs straight in!
But where do we find a calibration? If there is one on the Hondata website, I can't find it. So I laboriously went through a K-Pro datalog we made a couple of years ago from the Integra, and plotted A/F ratio against O2 voltage for 50 or so different points. The resulting nice curve (two separate curves, actually, but that's another story...) was entered into the three boxes in the s300 closed loop parameter tab, and I thought we were in business.
But there seems to be a problem or two. Firstly there is the obvious question - is what I am trying to do actually possible?
But also the voltages don't seem to make sense. O2 voltage starts out at 3.8(?!) cold, then slowly to drops to 1 and stubbornly stays there. A/F ratio, from my K-Pro download, is about 12:1 at 1 V. But there is no way it is running that rich at idle or on cruise - even -20% fuel trim makes no difference to the voltage, even though it is so lean it is almost undriveable. I am looking for .6 to .8 V. Back to 0 fuel trim, and a brief full-throttle run produces a low of 0.92 V at 7530 rpm. That would be 12.53 :1 on the Integra.
On lift-off (injectors zero ms) it does drop to .4 V. But cruising and at idle it goes straight back to 1 V.
Is the O2 sensor faulty? Does it need to run hotter? (The Type R DC5s and EP3s both use a relay to switch power to the O2 sensor heater.)
Or am I missing something obvious here?

The sensor from a DC5 will not work as there is no controller for it. Also that sensor works off of current rather than voltage.

OK thanks. I bet I'm not the only one who thought it would be a good idea.

Have you investigated the circuitry of the controller? Would it be possible to build something? It might be only a few components.

Am I correct in stating that it appears the Zeitronix wideband wires up like the PLX to the S300 in order to datalog with wideband input?