Brad Barnhill's Virtual Dyno with HP Tuners

[jakebdb56]

I loaded some data into the software to test it against a few customers' setups. It actually looks pretty reasonable.

<?xml version="1.0" standalone="yes"?>
<CarDataset xmlns="http://tempuri.org/CarDataset.xsd">
<CarParameters>
<CarMake>Chevy</CarMake>
<CarModel>Silverado Reg Cab 2WD 4.10 Gear</CarModel>
<Weight>4600</Weight>
<TransGear3>1.0</TransGear3>
<TransGear4>0.75</TransGear4>
<FinalGearRatio>4.10</FinalGearRatio>
<DragCoefficient>0.55</DragCoefficient>
<FrontalArea>29</FrontalArea>
<TireDiameter>29</TireDiameter>
</CarParameters>
</CarDataset>

I loaded a log from the track about a month ago and came up with 435rwhp @ 6000 RPM which sounds about right. Forged 6.2 with nitrous cam, kooks 1 7/8" headers, performabuilt lvl 5 4L80E with PI 4200 triple disc, 4.10's, FAST 102mm, LS3 throttle body

[S2H]

I think the best point is that if you can come up with a stable enough environment
You can use this as a tuning tool.

On a dyno I can see 20-30... sometimes even as much as 50 horsepower from fuel and spark tuning.
If I had the right stretch of flat pavement... I could get it dam close to the same on the street.

[5_Liter_Eater]

Fixd.

I loaded some data into the software to test it against a few customers' setups. It actually looks pretty reasonable.

<?xml version="1.0" standalone="yes"?>
<CarDataset xmlns="http://tempuri.org/CarDataset.xsd">
<CarParameters>
<CarMake>Chevy</CarMake>
<CarModel>Silverado Reg Cab 2WD 4.10 Gear</CarModel>
<Weight>4600</Weight>
<TransGear3>1.0</TransGear3>
<TransGear4>0.75</TransGear4>
<FinalGearRatio>4.10</FinalGearRatio>
<DragCoefficient>BRICK</DragCoefficient>
<FrontalArea>29</FrontalArea>
<TireDiameter>29</TireDiameter>
</CarParameters>
</CarDataset>

I loaded a log from the track about a month ago and came up with 435rwhp @ 6000 RPM which sounds about right. Forged 6.2 with nitrous cam, kooks 1 7/8" headers, performabuilt lvl 5 4L80E with PI 4200 triple disc, 4.10's, FAST 102mm, LS3 throttle body

[Sam272]

lol!

[bbarnhill]

If anyone has a list of vehicles that the program should support by default let me know. I really want to support GM vehicles but need a little help from the community to supply me with the data to put in regarding different models. If you look at the Cars directory in the installation directory you will find out the format that I need the .xml files to be in. I will include vehicles from the community if supplied. This is how all the mitsubishi and subaru guys have their vehicles in there.

I am doing this for donations only and working on my Masters at the same time and so I can either use spare time to develop new features and test those or do research on other vehicles. I feel like my time is better spent on development and leave the vehicle research to the community. You all know more about where that information is anyway.

Im working on getting some more HPTuners logs to test with to make sure HPTuner support is stable as can be.

Thanks for any help you guys can provide. If you find it useful there is a donate button in the app but its not required.

Hope you all enjoy it and I will keep developing it if you all will keep using it.

[jakebdb56]

Fixd.

Ha you don't want none of these race trucks :P

I'll be able to play in a few months with the S10

The attachment is from a customer's 09 4x4 6.0. Mods are headers, true dual, intake, tune, 4.56 gears, built trans. Pretty close to what it might be on the dyno in real life I think...

[bbarnhill]

If anyone has any definitions for vehicles please send them to me. Ill support most anything.

[Brice]

I've just tuned a C5 Z06 with Headers / Induction
Ive tried your program.
I've got a dyno sheet of the same car Induction Tuned. (without headers)


<?xml version="1.0" standalone="yes"?>
<CarDataset xmlns="http://tempuri.org/CarDataset.xsd">
<CarParameters>
<CarMake>Chevy</CarMake>
<CarModel>Corvette C5 Z06</CarModel>
<Weight>3115</Weight>
<TransGear3>1.43</TransGear3>
<TransGear4>1.00</TransGear4>
<FinalGearRatio>3.42</FinalGearRatio>
<DragCoefficient>0.29</DragCoefficient>
<FrontalArea>20.47</FrontalArea>
<TireDiameter>26</TireDiameter>
</CarParameters>
</CarDataset>



Here is the dyno without headers (dynoflow dyno)
342 RWHP

[bbarnhill]

you didnt log your car on the dyno did you? It was flat pavement?

[Brice]

you didnt log your car on the dyno did you? It was flat pavement?

not the dyno was 2 months ago.

good idea to log on the dyno ! I will try next time.
No the pavement was not perfectly flat. It's my first try.
I will try tomorrow on flat pavement

[Z06SUPERCHARGED]

Well I cant get the program to even work for whatever reason error says profile fields aren't specific or something. Spent way too much time on it already to mess with it any longer.

[bbarnhill]

Each error in the program displays an error number (E112: message). If you can provide the error code then I could probably help you a little better. Dont get frustrated because it didnt work in the first 5 minutes as I just now implemented the HP Tuner support in this thing. HP Tuner logs arent the nicest logs to deal with anyway, so please be patient and Ill get it corrected for ya. In fact if you send me your log Ill be glad to debug why it isnt working. It may be a different format log that I havent seen before and Ill be glad to support it for future releases. Just work with me without posting slander on the forums, which helps noone. Ohh and is the previous graphs are they WHP? Just trying to figure this out.

[bbarnhill]

not the dyno was 2 months ago.

good idea to log on the dyno ! I will try next time.
No the pavement was not perfectly flat. It's my first try.
I will try tomorrow on flat pavement

DO NOT log on the dyno it wont be accurate. The program takes wind resistance into account to figure power and on the dyno you dont have any of that so the numbers will be off.

unless there is tremendous wheel spin or clutch slipping, this program has been proven to be very accurate when compared to dynojets and mustang dynos in the import world. Everything from 700hp evos to stock subaru foresters. So before everyone starts knocking it lets eliminate all the variables that could be contributing to differences in numbers.

[SargeZ06]

DO NOT log on the dyno it wont be accurate. The program takes wind resistance into account to figure power and on the dyno you dont have any of that so the numbers will be off.

unless there is tremendous wheel spin or clutch slipping, this program has been proven to be very accurate when compared to dynojets and mustang dynos in the import world. Everything from 700hp evos to stock subaru foresters. So before everyone starts knocking it lets eliminate all the variables that could be contributing to differences in numbers.

Well I've done 3rd gear pulls on flat ground and it is about 200whp higher than what my car dynos. When I switch the software to 4th gear its about 400whp higher than what I have.

No clutch spin, no tire spin.

[S2H]

Hey Brad...
Yesterday I went out and worked on a buddies corvette...

<?xml version="1.0" standalone="yes"?>
<CarDataset xmlns="http://tempuri.org/CarDataset.xsd">
<CarParameters>
<CarMake>Chevrolet</CarMake>
<CarModel>Corvette LS1(Manual)</CarModel>
<Weight>3262</Weight>
<TransGear1>2.66</TransGear1>
<TransGear2>1.78</TransGear2>
<TransGear3>1.30</TransGear3>
<TransGear4>1.00</TransGear4>
<TransGear5>0.74</TransGear5>
<TransGear6>0.50</TransGear6>
<FinalGearRatio>3.42</FinalGearRatio>
<DragCoefficient>0.29
</DragCoefficient>
<FrontalArea>22.0</FrontalArea>
<TireDiameter>26.20
</TireDiameter>
</CarParameters>
</CarDataset>

car is a 99 corvette LS1
LS6 intake, TRex cam, Longtubes and full exhaust
between Him and I, 315 lbs of people in the car
should make in the ball park of 380~420 horsepower to the wheels and I would expect just slightly lower torque numbers
depending on what kind of dyno you are on.
pulled the drag and frontal area from the good old interweb..

we stopped the pull because his clutch was starting to slip at higher rpm's(they start to slip when you get to about 400HP at the wheels)...LOL

obviously you can see it doesnt line up quite right...shape of the curve looks about like what I would expect it to look like for his setup..I should know, I've tuned hundreds of LS1's now and many with this setup...

[creepyss]

Quick question
How you guys are loading the parameters to the program?
Its says access denied.

[S2H]

Quick question
How you guys are loading the parameters to the program?
Its says access denied.

you have to make an XML file with the car parameters in it in the correct format and put it in the correct file directory

[creepyss]

i tried that and it says access denied.
fixed just needed the xml notepad

[bbarnhill]

soundengineer: are you sure you are making that power with that car? Reason being is that unless its got wheel spin, slipping clutch, or some other factor the physics dont lie. If the car parameters are correct the math is pretty simple, and works. Im at a loss for explaining what you are running into without a comparison dyno run of the same car vs the car on the street being logged. Im just baffled as to why it has worked for SO MANY cars of different makes and models and it just doesnt work for GMs. That just doesnt make any sense whatsoever.

[Leafy]

Brad, my subie driving friend that introduced this to me commented on how I have way way way more data points than he does on the graph. Could our sampling rate have anything to do with it?