Logworks 3.0
I have a lm2 and have it all set up. I just need to know the formula for the map sensor. You know 5volts=11psi 0volts=26 inches type thing. I think its an obdo map sensor.
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Re: Logworks 3.0
0v = 0 psia, 4.74-4.75v = 9.25 psi. It won't go 5v, but if it did it would read Hyundaidata's erroneous claim of 11.3 psi.
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Re: Logworks 3.0
Originally Posted by Joseph Davis
0v = 0 psia, 4.74-4.75v = 9.25 psi. It won't go 5v, but if it did it would read Hyundaidata's erroneous claim of 11.3 psi.
http://wikitest.pgmfi.org/twiki/bin/...rary/MapSensor http://wikitest.pgmfi.org/twiki/bin/.../OBD1_8bitMBar Specifically: mbar=365.9(volts)-29.9 I honestly can't say for certain what your min and max voltage on the sensor is, but you can assume roughly the same as Motorolla sensors which I believe to be .2v and 4.9V. It could be 4.75V as JD has said, but I couldn't say for certain. Honestly, it won't matter. Plug in the equation I gave you and whatever the sensor does, it does. |
Re: Logworks 3.0
Dunno the minimum voltage, but my max figures are correct.
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Re: Logworks 3.0
The voltages, maybe, the pressures are not as long as we are going based on the shop manual. Your voltage may be correct. Your pressure may be correct, but if we are following the data sheet, both are not correct. I don't believe the Honda sensor to have THAT loose of tolerances to allow such a significant difference in theoretical value to actual value. I've always said I was going to put a sensor on a pressure vessel and compare the different types. I never did. Add it to the list.
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Re: Logworks 3.0
Originally Posted by fuse
I have a lm2 and have it all set up. I just need to know the formula for the map sensor. You know 5volts=11psi 0volts=26 inches type thing. I think its an obdo map sensor.
i will look for the formulas on my pc when i get home... |
Re: Logworks 3.0
1 Attachment(s)
Originally Posted by fastcrxsi90
are you using an ssi-4 or something similar to get sensor data into logworks? there are plugins you can use for this....especially if obd0...
i will look for the formulas on my pc when i get home... I found this is the service manual. I also recorded my Iat and tp measurements. I am not good at math but I tried doing a slop calculation I don’t know?? Attachment 11040 Will this help? I will do more math later. Thanks everyone I will try all the formulas. |
Re: Logworks 3.0
Originally Posted by bigwig
Joseph, these numbers are not right.
http://wikitest.pgmfi.org/twiki/bin/...rary/MapSensor http://wikitest.pgmfi.org/twiki/bin/.../OBD1_8bitMBar Specifically: mbar=365.9(volts)-29.9 I honestly can't say for certain what your min and max voltage on the sensor is, but you can assume roughly the same as Motorolla sensors which I believe to be .2v and 4.9V. It could be 4.75V as JD has said, but I couldn't say for certain. Honestly, it won't matter. Plug in the equation I gave you and whatever the sensor does, it does. And it looks like the Helms says 0v = 0 psia. As for 9.25 psi at 4.7x peak voltage www.zdyne.com I think you should stop looking at 8 bit resolution values, that's shoddy and not very accurate. Ask Warner why he was nutshit about 16 bit fuel maps. |
Re: Logworks 3.0
Ok I am using your equation. The only problem is in logworks I can not brake it into 2 things. For instance I can have inhgvac or psi but not both. The table set up will only read to 0 of each so if I am set on inhgvac I can not see boost if I am set on psi I can not see vac. So I need to know something different like 0v=30inhgvac and 2.9v=0inghvac then something like 3.0v=0psi and 4.7v=9.25psi. I am so confused. I can open the same file and set up both and but them up to each other. Then it starts to look like something usable.
Is logworks just gay? |
Re: Logworks 3.0
Originally Posted by Joseph Davis
OK, Motorola sensors are 0-4.9 volt units.
And it looks like the Helms says 0v = 0 psia. As for 9.25 psi at 4.7x peak voltage www.zdyne.com I think you should stop looking at 8 bit resolution values, that's shoddy and not very accurate. Ask Warner why he was nutshit about 16 bit fuel maps. PS: Blake never saw the resolution as an issue with map sensor values so there was never a reason to move from 8bit to 16bit map sensor data allocation thus why he never did it. He was the ultimate proponent of interpolation and not giving a ---- whether the map sensor was 100% accurate. Look back on HT on his ramblings about Neptune and how stupid he thought 24 column fuel maps were. Fuse, pick a unit and stick with it. -29.92inHG=-14.7psi=0mbar. It's just a pressure conversion. The numbers work. I'm not familar with log works, but pick the unit it works with and give it the defining values it needs. |
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