Smog results on E85...
07-22-2011, 03:01 PM
#16
Father Time
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Car Info: This aint a bag. It's a shipment.
You don't need to find a home for it.
You won't have to worry about it being a flow restriction (it goes on the return line, if you're making big power with a big pump that's not setup for less than 100% while idleing you'll need to get a ton of bypassed fuel through the sensor).
You won't need to buy a pulse width converter to get a 0-5V signal.
But I do realize its way easier to get working if you use it.
07-22-2011, 05:21 PM
#18
I like the idea of NOT using the sensor.
You don't need to find a home for it.
You won't have to worry about it being a flow restriction (it goes on the return line, if you're making big power with a big pump that's not setup for less than 100% while idleing you'll need to get a ton of bypassed fuel through the sensor).
You won't need to buy a pulse width converter to get a 0-5V signal.
But I do realize its way easier to get working if you use it.
You don't need to find a home for it.
You won't have to worry about it being a flow restriction (it goes on the return line, if you're making big power with a big pump that's not setup for less than 100% while idleing you'll need to get a ton of bypassed fuel through the sensor).
You won't need to buy a pulse width converter to get a 0-5V signal.
But I do realize its way easier to get working if you use it.
I also thought about the problem of having to push a lot of fuel through the sensor on the return line. The simplest solution I came up with is to set up the sensor in parallel with the main return line. This way the majority of fuel can flow unrestricted through the main line while the sensor gets enough to sample accurately.
Thanks
-- Ed
07-23-2011, 03:14 PM
#19
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The OEMs have opted to lose the fuel quality sensor as they're unreliable, costly, and not necessary.
But the OEMs have the $$$$ to spend on very sophisticated ECMs and the required algorithms.
But the OEMs have the $$$$ to spend on very sophisticated ECMs and the required algorithms.
07-25-2011, 09:59 AM
#21
Father Time
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The first step is to get the maps for both extremes setup and blending via a memory location storing the current ethanol percentage.
This location can then be updated via an actual sensor or some complex fuel trim code I explained above or via a static table that gets flashed after manually measuring the content or even a **** that you turn and monitor via a logger.
The OEMs were using a Siemens sensor. Zeitronix sells it along with a display that outputs a 0-5V signal. The siemens sensor outputs a pulse width signal that represents both fuel temperature and ethanol content. I looked into using an Arduino board to do the conversion but didn't have much luck finding one that supports a pulse input. The Megasquirt ECU can do it. Until I can find an aftermarket ECU that supports OBDII functions (or I stop driving on public roads) I'll be sticking with the OEM ECU.
Zeitronix ECA : SEMA Award Winning Ethanol Content Analyzer and Flex Fuel Sensor for E-85 and E-85/gasoline Blends
Can we get a mod to split this out from the E85 Smog results thread? I don't want to take away the info in both topics by hijacking.
08-06-2011, 08:08 AM
#22
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Went and got smogged on e85.
If you could fail for emissions being too clean I suspect I would have.. The two smog techs working on it kept saying "Soooo clean???"..
AFR was about as dead nuts stoich as I could make it for the two idle speeds..
Catless up-pipe.. Exhaust was from an 03 with unknown mileage..
E85 ftw again....
If you could fail for emissions being too clean I suspect I would have.. The two smog techs working on it kept saying "Soooo clean???"..
AFR was about as dead nuts stoich as I could make it for the two idle speeds..
Catless up-pipe.. Exhaust was from an 03 with unknown mileage..
E85 ftw again....
Code:
| %CO2 | %O2 | HC (PPM) | CO(%) | Test | RPM | MEAS | MEAS | MAX | AVE | MEAS | MAX | AVE | MEAS | RESULTS ================================================================================= Idle 762 13.68 0.9 100 17 4 1.00 0.00 0.01 PASS 2500 2500 14.20 0.0 130 12 12 1.00 0.10 0.18 PASS
08-06-2011, 09:45 AM
#23
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For comparison this just happend on E10 and PE850s on an 05 STi. Stock DP.
Code:
| %CO2 | %O2 | HC (PPM) | CO(%) | Test | RPM | MEAS | MEAS | MAX | AVE | MEAS | MAX | AVE | MEAS | RESULTS ================================================================================= Idle 762 13.68 0.9 100 17 4 1.00 0.00 0.01 PASS 2500 2500 14.20 0.0 130 12 12 1.00 0.10 0.18 PASS
can't wait to see the numbers and compare to my stock numbers from a few years ago
10-03-2011, 03:15 PM
#29
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Hey guys-
I'm gonna have to smog my 06 Wrx in June or so, was wondering if people have been passing with a CAT'd aftermarket downpipe. I've got a TurboXS turbo back with their huge CAT in it.
Anyway have any trouble passing with a different TMIC?
Thanks
Jeremy
I'm gonna have to smog my 06 Wrx in June or so, was wondering if people have been passing with a CAT'd aftermarket downpipe. I've got a TurboXS turbo back with their huge CAT in it.
Anyway have any trouble passing with a different TMIC?
Thanks
Jeremy
