Brad Barnhill's Virtual Dyno with HP Tuners

[bbarnhill]

I cant load HPL files. You have to export them in CSV or TXT format first.

[69lt1bird]

I cant load HPL files. You have to export them in CSV or TXT format first.

I added a TXT file.

[bbarnhill]

Looks like you are shifting gears. A run needs to be made in a single gear I think thats your issue. Its like you would on the dyno not a drag strip. Let me know if this helps.

[SargeZ06]

Looks like you are shifting gears. A run needs to be made in a single gear I think thats your issue. Its like you would on the dyno not a drag strip. Let me know if this helps.

Didn't help me. My single gear runs still had like a zillion HP.

[Leafy]

Didn't help me. My single gear runs still had like a zillion HP.

Are you choosing the right rear in the dyno program?

[SargeZ06]

Are you choosing the right rear in the dyno program?

Yes. Right gear and rearend drive ratio.

[TiredGXP]

Did you trim your log to only include the data points for the gear you selected? You're going to get improbably high results by including the first and second gear data points if you've selected third gear.

You only have a very narrow band of data points in the log for either second and third gear - unlikely to get a graph that is terribly useful. That's the problem with auto's with high stall converters, tough to get a good log. Auto's work best if you lock the torque converter and only do a run in one gear.

[SargeZ06]

I have trimmed the data points to only the few seconds of the pull.

rename the file to a .csv.

2002 Z06


<?xml version="1.0" standalone="true"?>
-<CarDataset xmlns="http://tempuri.org/CarDataset.xsd"> -<CarParameters>
<CarMake>Chevy</CarMake>
<CarModel>Corvette Z06 (Manual)</CarModel>
<Weight>3110</Weight>
<TransGear3>1.43</TransGear3>
<TransGear4>1.00</TransGear4>
<FinalGearRatio>3.42</FinalGearRatio>
<DragCoefficient>0.373</DragCoefficient>
<FrontalArea>20.7</FrontalArea>
<TireDiameter>25.5</TireDiameter>
</CarParameters> </CarDataset>

[69lt1bird]

I have trimmed mine down too, third gear only. Still get crazy numbers.

[SargeZ06]

I know man. It's not even close. I don't understand it.

[bbarnhill]

Ill try this myself in a bit ... Driving right now.

[SargeZ06]

No luck either?

[bbarnhill]

I got it to graph but i dont know what the numbers should be. They werent high I wouldnt think in the beta I just tested them in. Can you show me a screenshot of how high they were? Thanks guys. Hopefully I can get this issue resolved asap and get this released soon.

[SargeZ06]

I got it to graph but i dont know what the numbers should be. They werent high I wouldnt think in the beta I just tested them in. Can you show me a screenshot of how high they were? Thanks guys. Hopefully I can get this issue resolved asap and get this released soon.

That was a pull on a 150 shot. Car is 467whp N/A so somewhere close to 600whp is where it should be.

What did you get?

[69lt1bird]

Here ya go.

[SargeZ06]

Here ya go.

lol That looks very nice.

[TiredGXP]

That was a pull on a 150 shot. Car is 467whp N/A so somewhere close to 600whp is where it should be.

What did you get?

Well, I gave it a shot with a couple of different tools I use. Here's the result using Brad's program:
Attachment 27655

Here's the result using an excel program that calculates power based on smoothed acceleration and air resistance:
Attachment 27656

Torque calculates out a bit differently, but peak HP is virtually the same - just over 420 WHP. Are you sure you were running nitrous on that run?

**edit - I assumed this was third gear. If fourth, then yeah, the HP number is 888**

[bbarnhill]

I need to know how much the passengers weighed in the pull to be able to graph it. With 200lbs of passengers it showed 461hp.

[SargeZ06]

Vehicle weight is 3118. Passenger and nitrous bottle is another 250.

[SargeZ06]

Well, I gave it a shot with a couple of different tools I use. Here's the result using Brad's program:
Attachment 27655

Here's the result using an excel program that calculates power based on smoothed acceleration and air resistance:
Attachment 27656

Torque calculates out a bit differently, but peak HP is virtually the same - just over 420 WHP. Are you sure you were running nitrous on that run?

**edit - I assumed this was third gear. If fourth, then yeah, the HP number is 888**

Yes it was a 150 shot. Just a plug check for tuning.

Here is another 150 pull.

Time Engine RPM (SAE) rpm Vehicle Speed (SAE) mph Throttle Position (SAE) % LC1 WB afr
00:58.1 3438 53 100 14.63
00:58.3 3651 57 100 14.03
00:58.5 3802 59 100 14.54
00:58.7 3963 62 100 14.25
00:58.9 4126 64 100 12.48
00:59.1 4316 67 100 12.82
00:59.3 4482 70 100 13.54
00:59.5 4663 73 100 13.69
00:59.7 4818 75 100 13.51
01:00.0 5006 78 100 13.12
01:00.2 5181 81 100 12.67
01:00.4 5375 84 100 12.23
01:00.6 5481 86 100 12.28
01:00.8 5642 88 100 12.04
01:01.0 5782 90 100 11.91
01:01.2 5919 93 100 11.75
01:01.5 6079 95 100 11.63
01:01.7 6197 97 100 11.41