PDA

View Full Version : Virtual Dyno


EagleMark
02-11-2013, 01:09 AM
Anyone try this yet?

http://www.virtualdyno.net/
JeepsAndGuns
02-11-2013, 02:59 AM
Interesting. But how does it work? I see no discription of how it works, FAQ, how you get data from your vehicle, etc...

You can be our guenny pig...lol
Six_Shooter
02-11-2013, 03:11 AM
Interesting. But how does it work? I see no discription of how it works, FAQ, how you get data from your vehicle, etc...

You can be our guenny pig...lol

I was looking for the same stuff.
EagleMark
02-11-2013, 03:46 AM
You load a file from data logger, TunerPro is on there... also .csv which TunerPro will save as.

Looks cool, I downloaded it...
RobertISaar
02-11-2013, 10:13 AM
i've actually used it a couple of times...

what you'll want to do is export a tunerpro log as a CSV, making certain that you have TPS%, RPM and MPH at a minimum. read AFR, MAP(boost) and IATs are also nice to plot/use for SAE correction. couldn't tell you how accurate it is...

what you do then is chop out the parts of the log that aren't immediately before a WOT blast(preferably in 2nd/3rd gear) and everything after it.
PJG1173
02-11-2013, 10:37 PM
Hmm might have to download and try this. maybe compare it to the logs I pulled while on the dyno and see how close it is.
PJG1173
02-12-2013, 11:29 PM
not impressed. virtual dyno says my little v6 puts out almost 900 hp. log was taken while the truck was on a dyno jet reading 158hp in second gear.
RobertISaar
02-12-2013, 11:32 PM
i had stuff like that happen too... i had to tweak quite a bit to get it to generate more reliable values.
PJG1173
02-13-2013, 12:01 AM
yeah I already tweeked one of the xml files that had the wrong transmission gear ratios so now it thinks 367Hp. now thats some parasitic loss...
EagleMark
02-13-2013, 01:27 AM
Got to be in the way the data is put in? Can't be that far off, I've read others guys say it's real close...
Six_Shooter
02-13-2013, 01:44 AM
not impressed. virtual dyno says my little v6 puts out almost 900 hp. log was taken while the truck was on a dyno jet reading 158hp in second gear.

Did you account for the multiplication of 2nd gear when you input the data?

Also why would you do a dyno pull using 2nd gear?
RobertISaar
02-13-2013, 01:54 AM
another potential issue.... this software is intended to be used on the road, not on a dyno.... since the dyno presents a different load, it can cause wonky values.
EagleMark
02-13-2013, 01:56 AM
Did you account for the multiplication of 2nd gear when you input the data?

Also why would you do a dyno pull using 2nd gear?I think he's lucky they did it at all with 36 inch tires...
Six_Shooter
02-13-2013, 04:29 AM
I don't see why tall tires would negate someone from being on a dyno.
EagleMark
02-13-2013, 04:42 AM
Dynos around here will not do big tires like off road trucks. To much speed on dyno... ?
Six_Shooter
02-13-2013, 04:57 AM
That really doesn't make sense, since many "large tire" drag cars have tires that are 32+" tall, when they grow, during acceleration many grow larger than 36" in diameter.
EagleMark
02-13-2013, 05:12 AM
MAybe the dynos capibility? Some dynos are better then others? I'll ask why next time I go over there. Tried to do a truck with 44s and they said the dyno limit was a 31 inch tire? Since it was geared properly for 44s we didn't do dyno... Ended up just doing it at drag strip with Wide Band over six runs playing with spark and watching times, we found the end of spark advance... was more fun then a dyno too!