Looking for logs to correlate load to massair/rev
Sep 28, 2007, 04:42 PM
#48
So, a particular Hz number, like 2000Hz, doesn't necessarily mean anything until you look at what RPM it is at (and temp and baro).
Eric
Last edited by l2r99gst; Sep 28, 2007 at 04:46 PM.
Sep 28, 2007, 05:07 PM
#49
For a quick sanity check, you can use some math for the airflow through an engine:
Airflow= PR[CID*RPM*VE/(1728*2)]
21 psi = (21+14.7)/14.7 = 2.43 PR
2.43[122*7500*.9/(1728*2)]= 579.02CFM (assuming 90% VE at 7500 for his setup)
to convert to lbs/min from CFM, there is an equation that incorporates temp, but a standard temp approx is CFM*.07
579.02 * .07 = 40.53 lb/min
So, that is pretty close. With all of the assumptions above, I would say everything is looking pretty good.
For a better check, we can do the same math at 5500 RPM, where we know the VE should be about 100%. He said his boost peaked about 23 psi there:
23 psi = (23+14.7)/14.7 = 2.56 PR
2.56[122*5500*1/(1728*2)]= 497.04 CFM
to convert to lbs/min from CFM, there is an equation that incorporates temp, but a standard temp approx is CFM*.07
497.04 * .07 = 34.79 lb/min
All of those points seem to line up nicely with his data and the graphs.
Eric
Airflow= PR[CID*RPM*VE/(1728*2)]
21 psi = (21+14.7)/14.7 = 2.43 PR
2.43[122*7500*.9/(1728*2)]= 579.02CFM (assuming 90% VE at 7500 for his setup)
to convert to lbs/min from CFM, there is an equation that incorporates temp, but a standard temp approx is CFM*.07
579.02 * .07 = 40.53 lb/min
So, that is pretty close. With all of the assumptions above, I would say everything is looking pretty good.
For a better check, we can do the same math at 5500 RPM, where we know the VE should be about 100%. He said his boost peaked about 23 psi there:
23 psi = (23+14.7)/14.7 = 2.56 PR
2.56[122*5500*1/(1728*2)]= 497.04 CFM
to convert to lbs/min from CFM, there is an equation that incorporates temp, but a standard temp approx is CFM*.07
497.04 * .07 = 34.79 lb/min
All of those points seem to line up nicely with his data and the graphs.
Eric
Last edited by l2r99gst; Sep 28, 2007 at 05:14 PM.
Sep 29, 2007, 10:43 AM
#50
C6, the MAF has not been rescaled since the addition of a Buschur pipe and filter. I logged it a couple of times and it didnt seem to alter the trims much more than 2-3% (compared to some I have seen that were as high as 30% total correction). The Apexi MAF cone filter is 8% for comparison.
Gears used were 1-2 (it was kind of in town) as I recall since my peak speed wasnt over 65mph. Also this is a Green and when FP initially released it they listed that datalogging with an Emanage showed 2000hz +/- on pump gas with pretty much the same values for boost. Mods might have something to do with, as well as air density?
Edit- Barometer showed a linear drop from 103-98.5 by 7500 andthe air temp was logged at 76 dropping to 67*.
Gears used were 1-2 (it was kind of in town) as I recall since my peak speed wasnt over 65mph. Also this is a Green and when FP initially released it they listed that datalogging with an Emanage showed 2000hz +/- on pump gas with pretty much the same values for boost. Mods might have something to do with, as well as air density?
Edit- Barometer showed a linear drop from 103-98.5 by 7500 andthe air temp was logged at 76 dropping to 67*.
Last edited by JohnBradley; Sep 29, 2007 at 11:21 AM.
Sep 30, 2007, 03:36 PM
#51
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C6, the MAF has not been rescaled since the addition of a Buschur pipe and filter. I logged it a couple of times and it didnt seem to alter the trims much more than 2-3% (compared to some I have seen that were as high as 30% total correction). The Apexi MAF cone filter is 8% for comparison.
Gears used were 1-2 (it was kind of in town) as I recall since my peak speed wasnt over 65mph. Also this is a Green and when FP initially released it they listed that datalogging with an Emanage showed 2000hz +/- on pump gas with pretty much the same values for boost. Mods might have something to do with, as well as air density?
Edit- Barometer showed a linear drop from 103-98.5 by 7500 andthe air temp was logged at 76 dropping to 67*.
Gears used were 1-2 (it was kind of in town) as I recall since my peak speed wasnt over 65mph. Also this is a Green and when FP initially released it they listed that datalogging with an Emanage showed 2000hz +/- on pump gas with pretty much the same values for boost. Mods might have something to do with, as well as air density?
Edit- Barometer showed a linear drop from 103-98.5 by 7500 andthe air temp was logged at 76 dropping to 67*.
Thanks Eric for the calculations.. Interesting results ..
If there's anything to reinforce his, theory .. this was it .. different cars (3 evos (7/8/9), 1 airtrek turbo ) different MAF frequencies(as high as 400hz difference!), same boost levels (26psi) .. 'only' about 1-2lbs//min difference between the turbos ..
I'll post the CSVs if you're interested .. though you'll have to wait until I can get the laptop ..
Last edited by gunzo; Sep 30, 2007 at 03:40 PM.
Oct 2, 2007, 06:53 AM
#53
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EvoScan .99 defs-
<DataListItem DataLog="Y" Color="" Display="g/rev" LogReference="gRev" RequestID="00" Eval="[Load]/95" Unit="g/rev" MetricEval="" MetricUnit="" ResponseBytes="1" GaugeMin="0" GaugeMax="12" ChartMin="0" ChartMax="12" ScalingFactor="1" Notes=""/>
<DataListItem DataLog="Y" Color="" Display="Lbs/min" LogReference="lbs/min" RequestID="00" Eval="([gRev]*[rpm])/454" Unit="lbs" MetricEval="" MetricUnit="" ResponseBytes="1" GaugeMin="0" GaugeMax="65" ChartMin="0" ChartMax="65" ScalingFactor="1" Notes=""/>
For reference I renamed 2 byte load to just "Load" so you may need to change that in my def or change your 2 byte load tag. A big thanks to Bez and Eric for coming up with a formula that my little brain could figure out how to implement. I didnt have any time to test this at anything other than idle so there may be some bugs that I havent discovered yet.
enjoy
<DataListItem DataLog="Y" Color="" Display="g/rev" LogReference="gRev" RequestID="00" Eval="[Load]/95" Unit="g/rev" MetricEval="" MetricUnit="" ResponseBytes="1" GaugeMin="0" GaugeMax="12" ChartMin="0" ChartMax="12" ScalingFactor="1" Notes=""/>
<DataListItem DataLog="Y" Color="" Display="Lbs/min" LogReference="lbs/min" RequestID="00" Eval="([gRev]*[rpm])/454" Unit="lbs" MetricEval="" MetricUnit="" ResponseBytes="1" GaugeMin="0" GaugeMax="65" ChartMin="0" ChartMax="65" ScalingFactor="1" Notes=""/>
For reference I renamed 2 byte load to just "Load" so you may need to change that in my def or change your 2 byte load tag. A big thanks to Bez and Eric for coming up with a formula that my little brain could figure out how to implement. I didnt have any time to test this at anything other than idle so there may be some bugs that I havent discovered yet.
enjoy
Works well! Thanks JB
Oct 2, 2007, 11:06 AM
#55
Those are a couple of things that I can think of off the top of my head that would be doable. The equations I posted a few posts up can be used to find those.
What are you guys doing?
Eric
Oct 2, 2007, 11:11 AM
#56
I am trying to get Evoscan to report max horsepower and torque like DSMlink based mostly on airflow. I can look at a 2 byte airflow log and see where peak power is based on when it tapers, peak torque is pretty easy since you can base it off peak load. The thing that will hang me up is getting some sort of script written to see that the log no longer shows a 30hz jump between cells and its now 5-10hz/cell. It seems based off of dyno sheets and logs from the same car (thanks a ton Kreionic) that this works fairly well.
Based on this, one of the logs he sent me showed peak power at 6300 (fairly close) and peak torque at 3500. I am at work right now, but when I get home later tonight I will PM/email the log and xml (not that its complicated). Ideas on airflow taper vs actual power peak?
Kreionic's dyno sheet that fits surprisingly well with my current understanding:
https://www.evolutionm.net/forums/sh...d.php?t=281107
Based on this, one of the logs he sent me showed peak power at 6300 (fairly close) and peak torque at 3500. I am at work right now, but when I get home later tonight I will PM/email the log and xml (not that its complicated). Ideas on airflow taper vs actual power peak?
Kreionic's dyno sheet that fits surprisingly well with my current understanding:
https://www.evolutionm.net/forums/sh...d.php?t=281107
Last edited by JohnBradley; Oct 2, 2007 at 11:20 AM.
Oct 2, 2007, 11:25 AM
#57
Well, using g/rev and load (llbs/min) may get you a little close. Hz can change depending on temp and baro. G/rev will follow your torque curve and lb/min will sort of follow your HP curve.
The taper is because of volumetric efficiency decreasing after around 5000 RPM or so. If you first interpreted the data to get your VE curve, then you may be able to use that in your HP calculations. Without seeing the data, I can only speculate at this time.
I'm not sure if you use or have used DSMLink, but this is how DSMLink calculated it's torque:
DSMLink just basically uses RPM and vehicle speed along with a bunch of set paramaters....similarly to the way that DLL or EvoScan or any of the other HP calcs do it now.
Eric
The taper is because of volumetric efficiency decreasing after around 5000 RPM or so. If you first interpreted the data to get your VE curve, then you may be able to use that in your HP calculations. Without seeing the data, I can only speculate at this time.
I'm not sure if you use or have used DSMLink, but this is how DSMLink calculated it's torque:
Code:
package data;
public class TorqueCalc extends CalcRoutine
{
// BaroCalc inHGCalc=new BaroCalc();
// IntakeTempCalc tempCalc=new IntakeTempCalc();
RPMCalc revCalc=new RPMCalc();
VehicleSpeedCalc mphCalc=new VehicleSpeedCalc();
RunningAverage runAvg=new RunningAverage(6);
float vehicleMass=1550F;
float tireCirc=2.0F;
float drivetrainLoss=.2F;
float airDensity=1.24F;
float finalDrive=4.929F;
float rollingResistance=0.015F;
float frontalArea=1.48F;
float dragCoefficient=0.29F;
float gravity=9.81F;
float prevTime = 0;
float prevVelocity = 0;
float prevTorque = 0;
float decay = 5.0F / 6.0F;
float minTorque=Environment.getMinTorque();
float maxTorque=Environment.getMaxTorque();
// Gear ratios for 2G AWD
float firstRatio = 3.083F;
float secondRatio = 1.684F;
float thirdRatio = 1.115F;
float fourthRatio = 0.833F;
float fifthRatio = 0.666F;
float firstMphCutoff=170F;
float thirdMphCutoff=90F;
float fourthMphCutoff=65F;
float fifthMphCutoff=51F;
public void setInfo(TOC toc, DisplayDesc desc)
{
revCalc.setInfo(toc, desc);
mphCalc.setInfo(toc, desc);
}
protected void _reset()
{
revCalc.reset();
mphCalc.reset();
runAvg.reset();
vehicleMass=Environment.getVehicleMassFloat();
tireCirc=Environment.getTireCircFloat();
drivetrainLoss=Environment.getDrivetrainLossFloat();
if (Environment.getFwdCar())
{
firstRatio = 3.090F;
secondRatio = 1.883F;
thirdRatio = 1.217F;
fourthRatio = 0.888F;
fifthRatio = 0.741F;
finalDrive = 4.153F;
firstMphCutoff=150F; //160-190
thirdMphCutoff=74F; //64-68.1
fourthMphCutoff=63F; //59.4
fifthMphCutoff=49F;
}
else
{
firstRatio = 3.083F;
secondRatio = 1.684F;
thirdRatio = 1.115F;
fourthRatio = 0.833F;
fifthRatio = 0.666F;
finalDrive = 4.929F;
firstMphCutoff=170F;
thirdMphCutoff=90F;
fourthMphCutoff=65F;
fifthMphCutoff=51F;
}
}
private float calculateTorque(float mph, float rpm, float curTime)
{
// We have to adjust for which gear we're in
float gearMult = secondRatio; //default to 2nd gear //118.7
if (rpm/mph>firstMphCutoff) // 216
{
gearMult=firstRatio; //1st
}
else if (rpm/mph<fifthMphCutoff) // 46.5
{
gearMult=fifthRatio; //5th
}
else if (rpm/mph<fourthMphCutoff) // 58.7
{
gearMult=fourthRatio; //4th
}
else if (rpm/mph<thirdMphCutoff) // 76.6
{
gearMult=thirdRatio; //3rd
}
float finalDriveInGear = finalDrive * gearMult;
float velocity = rpm * tireCirc / finalDriveInGear / 60F;
// try to see if we can figure out if they are fwd or awd automatically
// disabled for now
// if ( (velocity * 2.236936 - mph) > 5 ) toggleDrivetrain =true;
// we need to account for divide by 0 cases
float timeDiff = ( curTime - prevTime );
if ( timeDiff == 0 )
timeDiff = 0.1F;
// do the math to calculate torque here
float accel = ( velocity - prevVelocity) / ( timeDiff ) ;
float airDrag = .5F * dragCoefficient * frontalArea * velocity * velocity * airDensity;
float rollDrag = gravity * rollingResistance * vehicleMass;
float force = vehicleMass * accel + airDrag + rollDrag;
// account for drivetrain loss here
torque = (1F + drivetrainLoss) * ( 0.73756F * force * tireCirc / 6.28F ) / finalDriveInGear;
if (torque < minTorque) torque = minTorque;
if (torque > maxTorque) torque = maxTorque;
// this REALLY helps to smooth things out
torque = prevTorque*decay + (1.0F - decay)*torque;
// update our previous values now
prevTorque = torque;
prevVelocity=velocity;
prevTime=curTime;
return runAvg.next(torque);
}
public float next(float vals[])
{
float mph = mphCalc.next(vals);
float rpm = revCalc.next(vals);
float curTime = vals[0]/1000000F;
return calculateTorque(mph, rpm, curTime);
}
public float next(int index)
{
float mph;
float rpm;
float curTime;
if (index+6>=allVals.length)
{
mph = mphCalc.next(allVals[allVals.length-1]);
rpm = revCalc.next(allVals[allVals.length-1]);
curTime = allVals[allVals.length-1][0]/1000000F;
}
else
{
mph = mphCalc.next(allVals[index+6]);
rpm = revCalc.next(allVals[index+6]);
curTime = allVals[index+6][0]/1000000F;
}
return calculateTorque(mph, rpm, curTime);
}
public String[] getReqLocs()
{
// return inHGCalc.getReqLocs();
// return mphCalc.reqLocs;
return revCalc.reqLocs;
}
float torque;
}
Eric
Oct 2, 2007, 11:26 AM
#58
I would be interested in seeing some dyno pulls that have been logged with 2-byte load. It may be a simple relationship between the airflow/rev and the mass airflow, for the torque and horsepower.
Maybe the VE has to be used to.
Eric
Maybe the VE has to be used to.
Eric
Oct 2, 2007, 03:55 PM
#59
Code:
TPS RPM Timing KnockSum JDMMAP Load Hz AirFlow gRev LbsMin WHP Lbsft 29.80392157 2000 22 0 -0.37969 79.0625 182.7048438 182.41 0.832236842 3.666241595 36.66241595 96.27550429 29.80392157 2031.25 23 0 -0.18622 78.75 185.0635938 188.7 0.828947368 3.708809124 37.08809124 95.8949687 30.19607843 2062.5 23 0 -0.18622 79.375 189.7810938 188.7 0.835526316 3.795755565 37.95755565 96.65603988 30.19607843 2093.75 22 0 -0.37969 80.3125 193.4175 194.99 0.845394737 3.89877804 38.9877804 97.79764665 30.58823529 2125 20 0 -0.37969 80.3125 197.741875 201.28 0.845394737 3.956968757 39.56968757 97.79764665 42.35294118 2156.25 19 0 1.55501 96.5625 249.634375 251.6 1.016447368 4.827565282 48.27565282 117.5854973 74.90196078 2187.5 15 0 2.52236 112.5 283.7379688 283.05 1.184210526 5.70586019 57.0586019 136.9928124 88.62745098 2250 14 0 2.71583 117.5 306.4409375 308.21 1.236842105 6.12972409 61.2972409 143.0813819 96.07843137 2250 13 0 3.10277 121.5625 323.4435938 327.08 1.279605263 6.34165604 63.4165604 148.0283445 100 2312.5 13 0 3.68318 125.625 338.3823438 339.66 1.322368421 6.735632101 67.35632101 152.9753072 100 2375 11 0 4.26359 130 358.923125 358.53 1.368421053 7.158590308 71.58590308 158.3028055 100 2406.25 8 1 4.26359 134.0625 353.1245313 377.4 1.411184211 7.479431733 74.79431733 163.2497681 100 2468.75 8 1 5.03747 138.75 399.5132813 402.56 1.460526316 7.942013969 79.42013969 168.957802 100 2531.25 5 1 5.61788 144.0625 424.3784375 427.72 1.516447368 8.454862117 84.54862117 175.426907 100 2593.75 8 0 6.19829 150.9375 454.1576563 452.88 1.588815789 9.077072586 90.77072586 183.79869 100 2625 8 0 7.16564 158.125 483.54375 484.33 1.664473684 9.623884187 96.23884187 192.5510086 100 2687.5 8 0 7.74605 165.9375 521.676875 522.07 1.746710526 10.33983379 103.3983379 202.0643983 100 2750 7 0 8.90687 174.375 556.1735938 559.81 1.835526316 11.11827614 111.1827614 212.3388593 100 2812.5 7 0 9.87422 182.5 599.8104688 597.55 1.921052632 11.90079411 119.0079411 222.2327846 100 2875 7 0 11.03504 194.0625 632.2432813 660.45 2.042763158 12.93600017 129.3600017 236.3126014 100 2937.5 6 0 12.96974 208.75 722.2689063 723.35 2.197368421 14.21755449 142.1755449 254.1977742 100 3031.25 5 0 14.90444 225.3125 790.3778125 798.83 2.371710526 15.83534699 158.3534699 274.3661604 100 3125 3 0 16.64567 240.625 878.634375 886.89 2.532894737 17.4345728 174.345728 293.0124044 100 3187.5 2 0 19.54772 263.4375 991.854375 1000.11 2.773026316 19.46921009 194.6921009 320.7915024 100 3281.25 1 0 22.83671 286.25 1097.310156 1107.04 3.013157895 21.77736639 217.7736639 348.5706005 100 3437.5 1 0 23.80406 278.75 1114.607656 1119.62 2.934210526 22.21662706 222.1662706 339.4377463 100 3531.25 2 0 24.38447 266.5625 1102.813906 1113.33 2.805921053 21.8246888 218.246888 324.5968583 100 3593.75 1 1 25.15835 282.5 1203.159063 1207.68 2.973684211 23.53893751 235.3893751 344.0041734 100 3781.25 1 1 24.96488 270.625 1169.94 1169.94 2.848684211 23.72596293 237.2596293 329.543821 100 3875 3 1 23.41712 248.4375 1115.590469 1113.33 2.615131579 22.32078165 223.2078165 302.5257941 100 3968.75 2 1 22.83671 270 1255.346406 1258 2.842105263 24.84494551 248.4494551 328.7827498 100 4125 1 1 25.35182 289.0625 1370.925156 1371.22 3.042763158 27.64625116 276.4625116 351.9954208 100 4187.5 2 1 24.57794 256.875 1241.881875 1264.29 2.703947368 24.94004318 249.4004318 312.800255 100 4312.5 3 1 24.96488 267.5 1331.9075 1320.9 2.815789474 26.74689891 267.4689891 325.7384651 100 4468.75 6 0 23.03018 240.625 1244.240625 1251.71 2.532894737 24.93143911 249.3143911 293.0124044 100 4500 5 0 23.22365 266.875 1434.021719 1452.99 2.809210526 27.84459773 278.4459773 324.9773939 100 4656.25 4 0 25.73876 270.625 1440.41 1427.83 2.848684211 29.2162684 292.162684 329.543821 100 4781.25 7 0 24.38447 254.6875 1418.591563 1427.83 2.680921053 28.23381891 282.3381891 310.1365059 100 4843.75 6 0 25.54529 270.625 1538.003281 1547.34 2.848684211 30.39276243 303.9276243 329.543821 100 5000 6 0 24.96488 264.0625 1520.214375 1522.18 2.779605263 30.61239277 306.1239277 321.5525736 100 5093.75 7 0 24.38447 256.875 1520.705781 1522.18 2.703947368 30.33751522 303.3751522 312.800255 100 5187.5 8 0 22.83671 243.75 1475.692969 1478.15 2.565789474 29.31725307 293.1725307 296.8177603 100 5312.5 8 0 22.64324 259.375 1592.254531 1603.95 2.730263158 31.9482886 319.482886 315.8445398 100 5468.75 7 0 24.96488 270.625 1708.226406 1603.95 2.848684211 34.3144092 343.144092 329.543821 100 5562.5 7 0 24.38447 263.75 1701.739844 1603.95 2.776315789 34.01598365 340.1598365 321.172038 100 5656.25 8 0 23.80406 263.4375 1734.074375 1603.95 2.773026316 34.54830418 345.4830418 320.7915024 100 5781.25 8 0 23.99753 263.75 1774.369688 1603.95 2.776315789 35.35369088 353.5369088 321.172038 100 5875 9 0 23.80406 260.9375 1782.133906 1603.95 2.746710526 35.54388622 355.4388622 317.7472177 100 6000 9 0 23.41712 260 1811.126875 1603.95 2.736842105 36.16971945 361.6971945 316.6056109 100 6125 9 0 23.22365 258.125 1829.210625 1603.95 2.717105263 36.6569818 366.569818 314.3223974 100 6187.5 9 0 23.22365 257.5 1851.225625 1603.95 2.710526316 36.94136912 369.4136912 313.5613262 100 6312.5 10 0 23.03018 254.6875 1871.373281 1603.95 2.680921053 37.27602235 372.7602235 310.1365059 100 6375 10 0 23.41712 253.4375 1881.103125 1603.95 2.667763158 37.46033069 374.6033069 308.6143636 100 6531.25 11 0 22.83671 250.625 1881.397969 1603.95 2.638157895 37.95257434 379.5257434 305.1895432 100 6656.25 10 1 23.03018 246.875 1897.614375 1603.95 2.598684211 38.10020215 381.0020215 300.6231162 100 6750 10 1 21.86936 245 1912.651406 1603.95 2.578947368 38.34338048 383.4338048 298.3399026 100 6843.75 11 1 21.67589 241.5625 1912.651406 1603.95 2.542763158 38.33047437 383.3047437 294.1540111 100 6906.25 11 1 21.28895 319.6875 1922.184688 1603.95 3.365131579 51.1903964 511.903964 389.2879086 100 7000 11 1 20.90201 236.5625 1921.398438 1603.95 2.490131579 38.39409923 383.9409923 288.0654417 100 7093.75 12 0 20.70854 234.375 1922.872656 1603.95 2.467105263 38.54851974 385.4851974 285.4016926 100 7187.5 12 0 21.67589 233.125 1935.944063 1603.95 2.453947368 38.84966236 388.4966236 283.8795502 100 7250 12 0 21.48242 230.9375 1936.926875 1603.95 2.430921053 38.81977452 388.1977452 281.2158011 100 7343.75 13 0 20.51507 228.75 1941.349531 1603.95 2.407894737 38.94928849 389.4928849 278.5520519 100 7437.5 13 0 19.93466 226.25 1939.482188 1603.95 2.381578947 39.01540401 390.1540401 275.5077672 100 7500 13 0 20.51507 224.375 1944.985938 1603.95 2.361842105 39.0172154 390.172154 273.2245537 100 7562.5 14 0 19.54772 222.8125 1948.425781 1603.95 2.345394737 39.068387 390.68387 271.3218757 100 7625 14 0 19.93466 220.9375 1948.130938 1603.95 2.325657895 39.05978292 390.5978292 269.0386622 100 7687.5 14 0 19.74119 218.75 1950.293125 1603.95 2.302631579 38.99004463 389.9004463 266.3749131 94.90196078 7781.25 14 0 19.35425 197.8125 1733.189844 1585.08 2.082236842 35.68811768 356.8811768 240.8790285
Last edited by JohnBradley; Oct 2, 2007 at 03:59 PM.
Oct 2, 2007, 04:01 PM
#60
The xml (which is VERY VERY basic at this point)-
<DataListItem DataLog="Y" Color="" Display="HP" LogReference="WHP" RequestID="00" Eval="[LbsMin]*10" Unit="whp" MetricEval="" MetricUnit="" ResponseBytes="1" GaugeMin="0" GaugeMax="1000" ChartMin="0" ChartMax="1000" ScalingFactor="1" Notes=""/>
<DataListItem DataLog="Y" Color="" Display="Torque" LogReference="Lbsft" RequestID="00" Eval="([WHP]*5252/[rpm])" Unit="lbsft" MetricEval="" MetricUnit="" ResponseBytes="1" GaugeMin="0" GaugeMax="1000" ChartMin="0" ChartMax="1000" ScalingFactor="1" Notes=""/>
I also hadnt seen the code for DSMlink until now so it becomes obvious I underestimated the equation. I am going to have to figure out some more math and how to implement that into EvoScan. The one thing that I am not quite sure about is how to have it detect the taper in Hz. I dont have enough definitive proof that thats always where peak power is going to be, but the circumstantial evidence looks to point that way.
<DataListItem DataLog="Y" Color="" Display="HP" LogReference="WHP" RequestID="00" Eval="[LbsMin]*10" Unit="whp" MetricEval="" MetricUnit="" ResponseBytes="1" GaugeMin="0" GaugeMax="1000" ChartMin="0" ChartMax="1000" ScalingFactor="1" Notes=""/>
<DataListItem DataLog="Y" Color="" Display="Torque" LogReference="Lbsft" RequestID="00" Eval="([WHP]*5252/[rpm])" Unit="lbsft" MetricEval="" MetricUnit="" ResponseBytes="1" GaugeMin="0" GaugeMax="1000" ChartMin="0" ChartMax="1000" ScalingFactor="1" Notes=""/>
I also hadnt seen the code for DSMlink until now so it becomes obvious I underestimated the equation. I am going to have to figure out some more math and how to implement that into EvoScan. The one thing that I am not quite sure about is how to have it detect the taper in Hz. I dont have enough definitive proof that thats always where peak power is going to be, but the circumstantial evidence looks to point that way.
Last edited by JohnBradley; Oct 2, 2007 at 04:18 PM.