OK, I'm fed up of waiting for ECUTek to get back to me on this one, so hopefully one of the ECUTek tuners can help me out here.

I have the ECUTek DeltaDash RoadDyno software and have run my recently self mapped WRX through it, it only displays in wheel horsepower. How do all the ECUTek mappers in the UK get the software to display flywheel HP figures?? Is it a change to a config file? ECUTek have more or less said it can't be done.

 

They guess, based on their experiences of cars on and off the rolling road...

dunx

 

I know most apply a percentage transmission loss (usually around 23%), but sorry I have no idea how to do this in DeltaDash. Might just be worth opening it in Excel (assume log is a csv), applying the losses there and then graphing it.

 

Are you surprised you haven't got technical support from Ecutek when you're open source mapping your own car?

 

Paul,
I suspect its this question on EcuTek Forums - How to get Road Dyno to report Flywheel figures..

I've tried to chip in, but as usual there's no answer - and that's to someone who's paid for 2 Ecutek licences
Even **** spammers don't get spotted for weeks on the forum - but least they get some interaction from Ecutek in the end.


Nick

 

When you pay the guts of £200 for a piece of software, yes I expect them to answer my queries. Next question......

 

I know that I can get the rough figures by adding 22 odd % but when you see a RoadDyno screen shot in the UK, the figures are all in Fly HP.

 

Adding 22% to the curb weight of the car will basically add 22% to the measured results on the graph. But ultimately there is no way of producing accurate flywheel figures from it as there are so many variables. I've seen some results that have been turned into flywheel figures by adding 24% but thats overstating it quite a bit IMHO.

And looking at the Ecutek forum link above, Ben from ecutek answered your query. Basically any "flywheel" figure is purely down the operator of the software.

Given the results are highly influence by incline (even a little), windspeed and direction and having the correct curb weight, I don't think they can be relied upon for absolutely accurate figures even for a comparison. If you carry out the test on the same piece of road as I know many Ecutek tuners do, you can eliminate some variables, but if you want to know the output of the car, find a good repeatable local dyno will be a good start. If you can get a good relationship with one, they may do cut price runs for verifying weekly/monthly map adjustments.

 

Hi Pavlo, I know it's by no means the be all and end all of accuracy, but it(RoadDyno) can give me a good idea of any power gains that I'm making. I'm lucky I have a straight flat road about 2 mins from the house, there's also 2 handily placed lay-bys at either end.

The specific issue I'm looking at is how do I get the software to add an arbitrary value across the power curve to show an estimated fly figure. It must be a config file somewhere that I can change. I know it's largely pointless it would just be nice to know how to do it.

 

I've just told you how to do it in my last post!

Since torque measured by DD is inversely proportional to the mass of the car for a given acceleration, you can artificially increase the weight of the car to increase the power figures.

If you're using 1600kg at the moment and hitting say 260hp at the wheels, changing the power to 2051kg will give a flywheel figure that assumes a 22% transmission loss (1600kg is 78% of 2051kg).

You could also change the tyre size to give an incorrect speed input to DD which you could use to add a non-linear transmission loss.

 

Yeah that did occur to me, will give it a bash when I get home.

Cheers.