The tuner who will tune my 13.5:1 D16z6 is requiring the sensor & analyzer in order for the ecu to know the actual e%. After much reading it seems to be a wise move since the e% changes so much. Hondata S300 can use the 0-5v signal from the analyzer but I don't want the display. Does anyone make an analyzer w/o the display? I don't care to see the e% as long as the ecu knows.
Isn't there a GM sensor that you can use? It's kind of expensive, IIRC. When I was entertaining the idea of E85 to E0, turbocharging, and MS, I don't remember needing much else than the one sensor for the hardware side.
The GM sensor is pretty cheap.
http://www.gmpartsdirect.com/results.cfm?singlepart=1&partnumber=13577379
ASSuming you can use this one, it's the one i bought to do Flex Fuel on my Haltech setup.
Oh, the Flex Fuel Megasquirt page has a different number. But I don't have any hands on, so. http://www.megamanual.com/flexfuel.htm
RossD wrote: Oh, the Flex Fuel Megasquirt page has a different number. But I don't have any hands on, so. http://www.megamanual.com/flexfuel.htm
I'm guessing they use this one: #12570260
Actually, that appears to be the one that FM sells for only $99.95. So... still cheap. 
Isn't the correct answer PickNPull?
Looks better then the old 90 degree fitting model like the manual calls for.... This is the one Haltech sells for there system, IIRC.
Ranger50 wrote:
Yep that's the Haltech one. My dealer/tuner suggested i buy it elsewhere than through him because he couldn't come close to matching the price through other vendors.
Dam it just when I think I am resided to not using E85 in my car I see this thread. Probably should surf over to the MS pages and read up on thins but how hard is it to have the MS adjust the fueling? Is it as simple as scaling the fuel maps and or the VR maps based on the sensors reading?
In reply to dean1484:
IIRC, it is already built into the firmware. Check off the boxes and it is good to go.
Depends on which Megasquirt.
Yes that is the sensor which outputs a frequency signal. There is a megasquirt which uses it BUT most ecus need an analog 0-5v signal from an analyzer which takes the sensor signal & converts it to analog. Seems this was convenient for the gauge to use also so this is the way it was done in the after market. If I must, I guess I'll add the meter.
You could build a circuit. Look up Frequency to voltage circuits.
Edit: Nerds should look at this: http://www.ti.com/lit/ds/symlink/lm2917-n.pdf It's pretty neat.
Cool thanks.
Also what frequency does it output? Guess I'll do some searching.
If you look at the megasquirt link, it states the frequencies of that sensor.
I should also note, I've never done this and it may not work 
. But I hope it does!!! 
Are you using a WB sensor for the ECU input?
FWIW- OEM's dropped the sensor once it was figured out that it's not that hard to calculate the fuel flow and know what the mixture is. It's even better now that virtually all new cars use WB sensors.
It's a lot cheaper that way.
Then agian, I would tune it myself....
I had read that oems weren't using the sensors. I will be using a wideband for the display. I'll find out if Hondata can use the wideband.
Megasquirt 3 is set up to use stock gm and ford sensors. I bought one out of an older Taurus at a junkyard; it doesn't work correctly, maybe because it was already unhooked from the fuel lines. However, maybe the sensors (which actually read the capacitance if the fuel) are failure prone which is why oems stopped using them. I am just using straight e85 and a safe tune for now. J
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