how to get dsmlink to read horsepower and torque???

[TheFlashDSM]

i have dsmlink v3lite how do i get horsepower and torque to show under displayed values???

 

[gofer]

Add it to your captured values first...

ECMLink: Captured Values Video

 

[WES_393]

Go to ECU inputs, then captured values, and select the "horsepower" and "torque" raw values into your captured values list. Then go back to your log, right click, go to displayed values, and ad horsepower and torque to your displayed values. You may need some other values in order for it to log such as speed, rpm, etc. It is also just a raw estimate of HP and torque, but still fun to play with.

 

[gusu]

While it is just a estimate it tends to be fairly accurate. I was kind of surprised to see how close it was to actual dyno numbers at one of English Racing's dyno days a couple years ago. My friend's estimate by link was only 25ish hp off.

 

[strokin4dr]

If you dial in your setup correctly it can be a very accurate estimate.

 

[gofer]

If you dial in your setup correctly it can be a very accurate estimate.

What in the setup needs dialed in to get the HP/TQ estimate accurate?

 

[91stocker]

Slightly off topic, but how would one calculate air flow in lbs/min from a simple SD log, such as one from mmcd or similar loggers.

What in the setup needs dialed in to get the HP/TQ estimate accurate?

Im no pro with link, but dont you have a to insert a couple of values to get an estimate, such as vehicle weight. I know there's a couple others

 

[gofer]

I know how to get accurate HP/TQ numbers, I wanted to know what strokin4dr meant by, "DIALING IN YOUR SETUP." Since cars actual tune has nothing to do with the logged HP/TQ Est accuracy.

Slightly off topic, but how would one calculate air flow in lbs/min from a simple SD log, such as one from mmcd or similar loggers.

Quote from Dave on ECMLink concerning airflow calculations using SD.

Remember that VE is actual air volume divided by the total piston-swept volume over two revolutions for a 4 stoke-cycle engine. Given an accurate VE obtained from the SD VE table (based on rpm and absolute manifold pressure), air volume per revolution is easily calculated from engine displacement. Air mass per revolution comes from applying air's standard density and intake manifold pressure (absolute) and temperature according to the Ideal Gas Law. Air mass per minute comes from multiplying air mass per revolution by rpm.

Dave

 

[91stocker]

I know how to get accurate HP/TQ numbers,

I didnt say you didnt. Was simply asking if my recollection was correct.

Quote from Dave on ECMLink concerning airflow calculations using SD.

Very informative, thank you.

 

[WES_393]

Im no pro with link, but dont you have a to insert a couple of values to get an estimate, such as vehicle weight. I know there's a couple others

I'm only logging the basics for tuning such as airflow, fuel, rpm, speed, timing, etc. and it shows HP and torque. If there are any other things that need to be logged, Link will tell you. For example, if your trying to use the MAF compensation tool you need open loop, fuel trim, and a few other things. If you don't have those captured, you get a message saying to do so and where to find them. It's great for holding your hand like that . So no, it works without entering any external values such as weight.

 

[TheFlashDSM]

i tried the captured values to displayed but it wont go into my displayed??? what would i need to add to get it to work??

 

[gofer]

I know 91stroker, and you were correct, I was just playing dumb in hopes that I'd get an answer from strokin4dr. Tom and Dave really know whats going on inside these DSM ECU's, 110% of the info they post is WAY more than I could ever come up with. Its actually impressive some of the stuff I read over there on ECMLink, reason why I just copy/pasted instead of trying to re-word it.

Mountainbike91, you need to go out to your car and connect to the ECU in Link. Hit F12 after you've connected to Link and then hit F12 again, this will start/stop the log. Then hit F10 (captured values) and add whatever you want CAPTURED then hit ok. Then, hit F9, find the values in the left column that you can add to the display by double-clicking them.

After you do this hit F12 again, starting a new log, and everything you just added to captured/displayed will be now shown in the datalog.

 

[TheFlashDSM]

i got on my dsmlink saying 327hp 239tq

 

[WES_393]

^ Nice! It would be safe to assume your around 300hp to the wheels. I don't think DSMLink takes friction into consideration which is ~15% loss with an AWD drivetrain.

 

[gofer]

Sounds like you got it to log then? Now you need to make a few changes to get WHEEL horsepower. Again, go out to the car and connect to the ECU and start a log (F12). Double click HorsepowerEst and enter 0% for drivetrain loss, this will get you close to wheel horsepower however, make sure the values you have entered for vehicle weight, speed calibration, and RPM settings through the gears must also be accurate for your car. Once this is matches your setup the HP/TQ still won't be accurate unless you do your 3rd gear pulls on a flat level road, this will get you close.

^ Nice! It would be safe to assume your around 300hp to the wheels. I don't think DSMLink takes friction into consideration which is ~15% loss with an AWD drivetrain.

Wait, what? Even if this was accurate your math is a bit off, 15% of 327 is 49 = 278

 

[preludeachris]

Sounds like you got it to log then? Now you need to make a few changes to get WHEEL horsepower. Again, go out to the car and connect to the ECU and start a log (F12). Double click HorsepowerEst and enter 0% for drivetrain loss, this will get you close to wheel horsepower however, make sure the values you have entered for vehicle weight, speed calibration, and RPM settings through the gears must also be accurate for your car. Once this is matches your setup the HP/TQ still won't be accurate unless you do your 3rd gear pulls on a flat level road, this will get you close.


Wait, what? Even if this was accurate your math is a bit off, 15% of 327 is 49 = 278

thats probably about right with auto trans ... maybe 280ish very impressive though...