wb per cylinder and pid ego control

[Yves]

A question about the following : is ms3x capable of controlling the engine based on 8 WB's (one per cyl on a V8) for individual fueling ? I'm asking because I assume it would use up a lot of processor power to do so, but may it's there already.

[racingmini_mtl]

Yes it can. Have a look at the manual: http://www.msextra.com/doc/pdf/html/Meg ... 4-122.html (and following pages).

And you will need to use some sort of CAN device to get all those AFR values to the MS3.

Jean

[Yves]

Yes it can. Have a look at the manual: http://www.msextra.com/doc/pdf/html/Meg ... 4-122.html (and following pages).

And you will need to use some sort of CAN device to get all those AFR values to the MS3.

Jean

Jean,

I know I need the can device. I assume your tinyiox is suitable for this ?

Already have the 8 WB bungs in the headers so it's saving up for the whole system. Kinda expensive, but hopefully worthwile.

[racingmini_mtl]

Yes, the TinyIOx would work. You could have 8 Innovate LC1/LC2 connected to the serial port (stereo jack), 8 14point7 SLC OEM modules connected to the I2C bus, or 8 generic WBO2 controllers connected to the ADC inputs. The first 2 options are preferable since you get digital values which are not affected by Vref offset, ground offset or analog noise.

Jean

[Yves]

The plan was for the 14point7's. What's the I2C bus ?

[racingmini_mtl]

The I2C bus is another type of communication bus that allows you to connect multiple devices using only 2 lines (SCL and SDA which are 2 pins on the TinyIOx CPU).

Jean

[Yves]

The I2C bus is another type of communication bus that allows you to connect multiple devices using only 2 lines (SCL and SDA which are 2 pins on the TinyIOx CPU).

Jean

I'm no electronics wizard. Is there a schedule about this. So far I've only connected the 0-5V outputs of an lc1 to ms.

[racingmini_mtl]

I think the best thing is to post on my forum. These are no longer MS3 or even MS-specific questions.

Jean

[Yves]

how much electrical power would 8 WB's draw during use ?

[racingmini_mtl]

I don't know if this is the same for all WBO2 controllers but with the 14point7 units, you should allow for up to 3A per sensor when the sensor is cold and about 1A per sensor in normal warmed up use.

Jean

[dontz125]

Also, depending on how you feed the SLC-OEM controllers, you have to allow for 50-75 mA each. Doesn't sound like much, but if you try to power them through the Vref line you'll max it out and trip the polyfuse (0.5A).

[Yves]

I don't know if this is the same for all WBO2 controllers but with the 14point7 units, you should allow for up to 3A per sensor when the sensor is cold and about 1A per sensor in normal warmed up use.

Jean

Hm, that's a continually 8A

[racingmini_mtl]

Hm, that's a continually 8A

That will actually depend on where your sensors are located on the exhaust and it will likely be less (possibly significantly) when running at full power as the exhaust gases will provide a good part of the heating. But you still need to plan for around that.

Jean