RomRaider

No prob. Also check out this thread in the ms41 section, its pertaining to the Road Dyno function, and is relevant to ms41 / 42 / 43.

https://www.romraider.com/forum/viewtopic.php?f=58&t=15385&p=140867

Nice way to check for gains inbetween getting strapped down on a real dyno.

Thanks for that, I didn’t think the dyno part of RR worked on Bmw, I thought that was for the Subaru lot, I’ll give it a go and see what I can do, nice one

Lol don’t thank me yet...finding some of the info about your car that are needed for proper calculations may be extremely hard.

Haha I’ve just been looking and so far I think I’ve found what I needed, but then I wasn’t sure how to add my car to the car_def file but worked it out and managed to add it so I can select my car on the drop down menu, I’ll update you when I test it and we can see if it works, I’m hoping it does as that would be a great help to do tests before paying for a proper dyno lol fingers crossed lol

Heck yeah. After you do a proper pull and then load the csv log in the road dyno post up a screen shot of the results...interested in seeing what others come up with.

Maybe even post up the info for your car that you entered in your car_def to. Maybe we can start compiling a list of the BMW infos like the Subaru guys have.

Yeah I will do, be interesting know how how close it is to an actual dyno, will certainly help with tuning if it works ok, I’ll see if I can get it tested in the next few hours, I’ll post a screen shot of the dyno results and the car_def info

So I’m not sure I have things setup properly, I’m only able to log data using protocol DS2 K-Line but when I load the logger file it says it need to be on protocol SSM, so not sure if that’s why the road dyno won’t work? I’ve tried to message dshultz but it just goes to outbox so not sure if his inbox is full?
You have any thoughts on this?
On the ms41 thread it says about throttle % but the logger only shows as TPS°, could this also be a problem? It doesn’t realise I’m at WOT? Don’t know how to get it to log as % rather than °?

I can help but gonna be a little slow at it, quite busy on and off around here as I am primary care for my disabled autistic child.
I did respond to your post in the ms41 thread too. I forgot about the WOT deal, you have to look in your up to date logger def for the correct TPS parameter and change one of the “expression” lines.

I’ll dig through the logger def in a bit and try to get some screen shots of what you’ll need to do, because right off the top of my head I don’t know what parameter number it is etc etc. In the mean time you may need to do what I suggested to your post in ms41 thread. Also go ahead and make a backup of your logger def file.

I just read your reply, In the other thread, I’ll have a look at the logger def, I’m not clued up on them so may need a point in the right direction on what to do with it, I’ll have a look when I get home from work tomorrow and see what I can find
There’s no rush for it to be honest so I’m happy to wait if your busy mate, sounds like you have more important things to deal with so any help is greatly recieved
Thank you

Okay, now i'm not sure how high the MS43 logger value for Parameter 13 - * Throttle Position displays when you push your throttle to the floor, but mine only went to like 76%. Since the Road Dyno feature will not read TPS values below 98% we have to change the "conversion / expr=" value for Parameter 13 in the logger definition file.

Plug you computer into your car, load up logger, and with the engine off but the key on go ahead and click the tick mark for parameter 13 which is named " * Throttle Position". Press your throttle to the floor and make note of how high the value goes.
If it doesn't go to 98, open up your logger definition file, and then press CTRL + F and search for MS 43.
When MS 43 is found / highlighted, do CTRL + F again and search for P13. When P13 is found / highlighted, look for this line of code below, within <ecuparam id="P13">.

You may want to mess around and slowly raise the expr= value slowly, saving and testing each time. The goal here I believe is to adjust that expr= code just high enough to when
you have your pedal to the floor it reads 100 in the logger. For example you may only have to bump it up to like expr="0.0020*x".
Now that that is done, you can make a "log to file" pull in whatever gear you want. Only log Parameter13 *Throttle Position
and * Engine Speed.

When you are done with your pull, stop recording, click the Dyno tab, select your car from the dropdown, select which gear you made the pull in, click the tick mark
"Load from File", click the "Read from File" button, and select your logged pull you just did.
Then you can adjust things further on the Dyno screen like Smoothing Factor, Temps. , what RPM range to look at etc etc and click "Recalculate".
That is as far as I go...not 100% sure what the smoothing factor is but I start with what dx4picco said in his thread about the RR Road Dyno.
Really you don't have to adjust the Humidity, Temp., Elevation stuff if you are just trying to check if you are gaining/losing hp/tq with tune edits.

Hope this all helped!

*Note-This is NOT an accurate pull for my car...got some issues to workout before I can make an accurate pull.

That’s awesome stuff, I’ll give that a go when I get home from work, dshultz has told me to make a new logger profile as I may have the wrong one, so I’ll look at both and I’ll load up my results ( if I do it correctly lol )
Thanks mate

Hi,

Can you please clarify what was the issue exactly, I'm facing the same problem on 2 laptops and can't get the knock adaptation tables to display anything.

Thanks