Drive Pressure Data Logging, Part 1

LBZ

Super Moderator
Staff member
Jul 2, 2007
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I have the autometer C2 Gauges for boost and egt-and I have a spare egt gauge. These are electric gauges but I'm not sure if they are full sweep-I'll check it out right now!

Yup full sweep-we're good to go Simon!
 

sweetdiesel

That's better
Aug 6, 2006
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well i dont know what the hell is going on, The voltage is all over the place
after a 1 hour log the average voltage from the Aux Voltage 1 is average = to drive pressure but it spikes all over the place

to Me its not the formula,but more the sample rate of this selected PID it has so many readings per sec that you can not even monitor it while driving,at idle its fine?

Anyways its cristmas eve and i just got a bottle of Don Julio Real so life is good:alcoholic:


ON EDIT: I need to learn to stop posting under the influence


Merry HO HO everyone
 
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LarryJewell

Back with his honey :)
Jan 21, 2007
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well i dont know what the hell is going on the voltage is all over the place
after a 1 hour log the average voltage from the aix voltage 1 is average = to drive pressure but it spikes all over the place

to Me its not the formula,but more the smaple rate of this selected PID it has so many readings per sec that you can not even monitor it while driving,at idle its fine?

Anyways its cristmas eve and i just got a bottle of Don Julio Real so life is good:alcoholic:


Merry HO HO everyone

How's Mr. Julio treating you this morning :D
 

sweetdiesel

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Aug 6, 2006
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here is a calibration sheet i built that should work for all ranges of pressures and EGTs


On the gauge I seen close to 55PSI on the gauge so matching that up:)
 

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sweetdiesel

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Aug 6, 2006
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with this log a person should be able to see what vane posistion,boost and drive prssure reflect.Also Timing and fueling can be referenced if I was better at building Maps in EFI it in theory work the math for us,but thats out of my leauge
 

sweetdiesel

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Aug 6, 2006
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LAME....EGTS wont log this way?????????

Im going to talk to Autometer when i get a chance,they made this option so they could hook up the autometer data logger.
 

LBZ

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Staff member
Jul 2, 2007
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We can't seem to get the 0-5 volts required from the back of the gauge to go to the V2. It either isn't there or my gauge is NFG. The sweep works fine though. Or we are using the wrong pins on the autometer gauge - we'll see what autometer has to say.
 

Muff

Just Learning
Oct 7, 2013
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Whats the sure fire correct way to log these types of things these days? Just leafed threw this thread and im sure you guys have it figured all out to a science now.