MAFless - convert maf to map sensor?

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britishturbo

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	Re: MAFless - convert maf to map sensor? « Reply #45 on: March 21, 2013, 01:45:58 PM »

Quote from: nyet on March 21, 2013, 01:42:28 PM

Does it need an RPM pickup? throttle plate/accel pedal input?

Sensor Monitor & Datalogger:
The Sensor monitor page is used to view various sensor and signal values. Each button toggles one of the 4 viewed valuse through the following list.

RPM - Engine RPM
MP - Manifold presure (KPA)
DC - Density Compensation (Speed Density Airtemp correction factor)
AFL - AirFlow, Speed Density calculated Grams/Sec
AFI - Airflow Input, If a MAF is connected.
VE - Volumetric Efficiency, from the Speed Density algorithm
FI - Frequency input value
FO - Frequency output value
UT - User Tune. Combined System Scale, AF Tune, Airtemp, and Triggered adjustments
TPS - TPS sensor value
BD - Boost Dutycycle
MT - Manifold Temperature
O2 - Voltage reading on O2 sensor input
FE - Flow Error. If a MAF is conected, this is the % dif, MAF and Speed Density
ASC - Afterstart correction
AFR - A/F Ratio, if a wideband is connected.
CF - Wideband tracking Correction Factor
TAF - Target A/F Ratio


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britishturbo

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	Re: MAFless - convert maf to map sensor? « Reply #46 on: March 21, 2013, 01:47:10 PM »

Quote from: Axis on March 21, 2013, 01:44:57 PM

Hello!
Explain how AFR Tracking differs from Closed loop

The ME7.1 ecu is only closed loop at low load and part throttle, at WOT you are fully open loop...
So this unit could allow you to use the wideband to stay at an exact AFR during open loop mode on the ecu...


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Axis

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	Re: MAFless - convert maf to map sensor? « Reply #47 on: March 21, 2013, 01:50:43 PM »

Quote from: britishturbo on March 21, 2013, 01:47:10 PM

No matter how you look at it, AFR tracking is a closed loop system. Get yourself a wideband ECU instead if you have the urge to go closed loop at WOT.


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nyet

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	Re: MAFless - convert maf to map sensor? « Reply #48 on: March 21, 2013, 01:52:35 PM »

Quote from: Axis on March 21, 2013, 01:50:43 PM

No matter how you look at it, AFR tracking is a closed loop system.

Sounds like a tautology Tongue

Quote

Get yourself a wideband ECU instead if you have the urge to go closed loop at WOT.

Not easily done on an ME7.1 car.


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ME7.1 tuning guide
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britishturbo

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	Re: MAFless - convert maf to map sensor? « Reply #49 on: March 21, 2013, 01:52:58 PM »

Quote from: Axis on March 21, 2013, 01:50:43 PM

No matter how you look at it, AFR tracking is a closed loop system. Get yourself a wideband ECU instead if you have the urge to go closed loop at WOT.

If using a wideband ecu aka ME7.5 on a 2.7T V6 was easy... I'm pretty sure many would have done it by now... It's not at all simple or that easy.
Indeed AFR tracking IS closed loop... in a time when the stock ecu is normally open loop... I think that is pretty cool myself.


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Axis

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	Re: MAFless - convert maf to map sensor? « Reply #50 on: March 21, 2013, 01:59:40 PM »

Quote from: nyet on March 21, 2013, 01:52:35 PM

Sounds like a tautology Tongue

Exactly.

My point was AFR tracking is by definition closed loop.
Use a 7.1.1 if you guys really need WOT closed loop Tongue


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nyet

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	Re: MAFless - convert maf to map sensor? « Reply #51 on: March 21, 2013, 02:02:16 PM »

Quote from: Axis on March 21, 2013, 01:59:40 PM

Use a 7.1.1 if you guys really need WOT closed loop Tongue

Need is a strong word... i think it just came up in the context of something to play with.

I'd use 7.1.1 if it wasn't such a huge pain to work with. Plus we still don't have a functional ME7checksummer for it.

Care to help?


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ddillenger

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	Re: MAFless - convert maf to map sensor? « Reply #52 on: March 21, 2013, 02:04:10 PM »

Quote from: nyet on March 21, 2013, 02:02:16 PM

I'd use 7.1.1 if it wasn't such a huge pain to work with. Plus we still don't have a functional ME7checksummer for it.

Care to help?

Once you have a bone, you don't let go do you? LOL

I'm making the switch over to 7.1.1. The added resolution sold me.


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Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience!

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Axis

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	Re: MAFless - convert maf to map sensor? « Reply #53 on: March 21, 2013, 02:11:11 PM »

Quote from: nyet on March 21, 2013, 02:02:16 PM

I'd use 7.1.1 if it wasn't such a huge pain to work with. Plus we still don't have a functional ME7checksummer for it.

Care to help?

I'm looking at 7.1.1 checksum now and then but have not had enough time to solve it for you yet. I'm sure there are others out there working on it in silence like I have.
I've also wondered why nobody have reversed Winols plugin or ECUfix code. Surely ECUfix must make a perfect checked bin?


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nyet

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	Re: MAFless - convert maf to map sensor? « Reply #54 on: March 21, 2013, 02:12:57 PM »

Quote from: Axis on March 21, 2013, 02:11:11 PM

Surely ECUfix must make a perfect checked bin?

Nope


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Axis

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	Re: MAFless - convert maf to map sensor? « Reply #55 on: March 21, 2013, 02:16:01 PM »

Ouch!


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ddillenger

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	Re: MAFless - convert maf to map sensor? « Reply #56 on: March 21, 2013, 02:26:27 PM »

Quote from: nyet on March 21, 2013, 02:12:57 PM

Nope

Another issue I've had with the 551R allroad file is after a few revisions, winols will error out, telling me not all the expected checksums were found. It detects 73/74. When that happens, I start over and copy my mods to a fresh version of the file. This is usually after 1-2 checksum corrections.

End of hijack.


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phila_dot

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	Re: MAFless - convert maf to map sensor? « Reply #57 on: March 21, 2013, 02:30:35 PM »

There is no 2.7t wideband file or anything even remotely workable AFAIK.

DD, what benefit are you swithing to 7.1.1 for?

Just to be remotely OT, I hate piggyback devices. Maybe I'm a purist, idk.


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ddillenger

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	Re: MAFless - convert maf to map sensor? « Reply #58 on: March 21, 2013, 02:34:53 PM »

Honestly, just the map resolution. I'm assuming you've looked through the 7.1.1 files, not enough improvement to warrant a switch?


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phila_dot

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	Re: MAFless - convert maf to map sensor? « Reply #59 on: March 21, 2013, 04:08:03 PM »

Honestly, it's been awhile, but I don't remember anything that impressive to make it worthwhile.


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