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trying to log HP and TQ?

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Old Nov 12, 2008 | 09:45 PM
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Exclamation trying to log HP and TQ?

Need step by step help on how to log HP and TQ with Evoscan 2.5, i tried searching but cant find a step by step help. I think im missing a step because it's just not showing at all. Thanks

Drew

Old Nov 12, 2008 | 10:00 PM
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Old Nov 12, 2008 | 11:28 PM
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Needs to have 2 byte load all setup to work properly...I wrote the subroutine a long time ago but I havent followed up the implementation in the later versions.

What specifically is happening? Anything at all with the parameters it needs to work?
Old Nov 12, 2008 | 11:43 PM
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Originally Posted by worksevo89
Need step by step help on how to log HP and TQ with Evoscan 2.5, i tried searching but cant find a step by step help. I think im missing a step because it's just not showing at all. Thanks

Drew

first you would need to make sure you have the correct formula for the parameters. Check these formulas "in evoscan program"
est. g/rev = [LoadMUT2Byte]/95
est. Lbs/min = ([gRev]*[rpm])/454
est. Horsepower = [LbsMin]*9.15
est. Torque = ([WHP]*5252/[rpm])
If you open up Evoscan, (R)click the parameter, then edit, and you will find the formulas in the box labled Eval:

Second you need to make sure that if youre logging a parameter that refers to another parameter, that parameter needs to be listed above that item... I hope that makes sense.

Ex. Est. Tq refers to [WHP] and [rpm], so these parameters must be above Est. TQ.
Ex. Est. HP refers to [LbsMin] so this needs to be listed above est. HP.

So basically the list needs to be in this order above! and rpm must be above all of them!
Old Nov 12, 2008 | 11:48 PM
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I think I might have misread your post... Are you saying the data item isnt in the list of parameters?
Old Nov 13, 2008 | 03:01 PM
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So I did logged some data but all I could get was 240 TQ. and 19 HP. Was my car really only making 240 TQ?
Old Nov 13, 2008 | 03:05 PM
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You also have to understand that those number are estimates off of estimates, that are based on assumptions.

If you want true mass airflow, for starters, read about the patch that mrfred made for mass airflow logging and then I ported to 96940011.

Simply put, don't use those HP/TRQ numbers are true numbers...use them for tuning to see changes made from one pull to the next.

Better yet, use acceleration figues to see changes. IE. acceleration times from 4000RPM-7000RPM.

Last edited by l2r99gst; Nov 13, 2008 at 03:08 PM.
Old Nov 14, 2008 | 11:06 AM
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est. g/rev = [LoadMUT2Byte]/95
est. Lbs/min = ([gRev]*[rpm])/454
est. Horsepower = [LbsMin]*9.15
est. Torque = ([WHP]*5252/[rpm])

I changed my values to these on evoscan 2.5 because I wasn't getting a horsepower reading. Now I'm not getting torque or hp readings.
Old Nov 14, 2008 | 12:38 PM
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How do I set up the logging graph so that the bottom line doesnt doesnt show log seconds but RPM?
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