Scatter Plots for Beginners

[whittlebeast]

NaN stands for "Not a Number".  Look at the raw data in the log and see what is there.

[rbabos]

NaN stands for "Not a Number".  Look at the raw data in the log and see what is there.

Looks normal to me in the .csv.
Ron

[whittlebeast]

Here is my stock tune that pulsed and throbbed and I generally hated.

http://www.nbs-stl.com/HarleyTuning/Sporty%20Stock%20MAPxRPM%20vs%20DC.png

Here is the tune I was running 5 years ago.  Lots better than stock.  Hand tuned and mostly open loop.

http://www.nbs-stl.com/HarleyTuning/Sporty%20Tuned%20%20MAPxRPM%20vs%20DC.png

And here is the tune that developed using the Target Tune.  Far and away, a smoother running bike.

http://www.nbs-stl.com/HarleyTuning/Sporty%20TT%20MAPxRPM%20vs%20DC.png

The graphs show why.  Way more  consistent control of the injectors now.

Andy

[whittlebeast]

Here are a few examples of using filters to your advantage.  The first two links are comparing the same bike with MAP based tuning on the left and TPS base tuning on the right.

First with no filters

http://www.nbs-stl.com/HarleyTuning/Sporty%20MAP%20vs%20TPS%20Based%20Tuning%20No%20Filters.png

Then applying filters to toss out the restart (less than 60 sec run time), data when the AE or DE are active and zero throttle.

http://www.nbs-stl.com/HarleyTuning/Sporty%20MAP%20vs%20TPS%20Based%20Tuning%20Filtered.png

This is MAP based tuning on both sides but on the left is no filters and on the right is with filters applied.

http://www.nbs-stl.com/HarleyTuning/Sporty%20Tuned%20%20MAP%20vs%20RPM%20Filters.png

And then the MAPxRPM compared without filters on the left and then filtered on the right.

http://www.nbs-stl.com/HarleyTuning/Sporty%20Tuned%20%20MAPxRPM%20Filters.png

Have fun tuning

Andy

[whittlebeast]

Here is a cool screen shot coming off my Sporty running Target Tune ans TPS based tuning.

http://www.nbs-stl.com/HarleyTuning/Sporty%20TPS%20Based%20Tuning%20Filtered.png

It will be tough to get any more text book than that.  You can see the filters I used to generate that shot.  That is about 2 hours of data.

Andy

[whittlebeast]

Here is a plot of the stock Sportster O2 closed loop behavior. That is an insane swing in duty cycle.  The color indicated O2 Voltage.  What a mess...

http://www.nbs-stl.com/HarleyTuning/Sporty%20Narrow%20Bands%20Switching.png

Andy

[whittlebeast]

Here is something I wrote this weekend to help people get started in the tuning world.  It is written for the big picture of tuning and not really just Harley Tuning.  See if it helps.

www.nbs-stl.com/tuning/BasicTuning101.pdf

I reserve the right to change it at any time 

Andy

[Coyote]

Nice read Andy. 

[Sarhan]

Good information for beginners.. good job Andy

[whittlebeast]

On the EFI 101 PDF...   What do I need to add?  What part of EFI throws people?

[azlou66]

Andy I am plum tuckered out tonight but I'll read it tomorrow, I'm probably the most EFI ignorant in the group.

[Jamie Long]

from the thread http://harleytechtalk.com/htt/index.php/topic,87059.0.html


Below are a few MLV screenshots of the latest log he provided, closed loop is averaging within about 1% correction for both CLI (short term) and AFF (long term) multipliers.

[whittlebeast]

Look real close to me....

[azlou66]

Andy,
I have read your intro a few times and I really like what you have done there.

Can you write something specifically for Harley motors?

Thanks again for all of your time, your willingness to share your knowledge is commendable.   

[whittlebeast]

The only thing that is different in the Harley world is the terminology.  The logic, is for the most part, is all the same.

Trying to utilize the narrowbands way out at the edge of usability is a little unique it the Harley world.

Andy

[Admiral Akbar]

The logic, is for the lost part, is all the same.

Andy

   Very good..

[whittlebeast]

spell check.....

[whittlebeast]

I have been editing the EFI Tuning doc at

http://www.nbs-stl.com/tuning/BasicTuning101.pdf

See what you think....  It is a work in process.

Andy

[whittlebeast]

I came up with two simple filters that finds where you spend most of your riding time.  In a last screen, you find out just how tight your tune is in most of the time you ride.

The first filter simply throws out when you are at 0 throttle.  This tosses out the time idling.

The filter is written

Zero Throttle

And define it as

[TP]< 1

Then you plot X=RPM  Y = MAP and X=Hits

http://www.nbs-stl.com/HarleyTuning/Sporty%20Cruise%20Area.png

The left most screen shows the results.  The red areas are where you spend the most time riding.  If you are looking for fuel economy, that is where you want to be as lean as possible and still have the motor happy.

Now I create a filter to isolate just this area.

Mid Range Only

And define it as

[RPM] <2000 or [RPM]> 3700 or [MAP] < 26 or [MAP] > 55

Note:Your numbers will be slightly different, depending what you see as your red area in the first screen.

The screen on the right is X= MAPxRPM Y=Duty Cycle Front or Rear and Z=AFR Front or Rear with filters applied.  You want nearly a straight line in this area that shows up.

I also have a filter that throws out AE and DE

Transient HD

And I define it as

[Acel Enr] >0 or [Decl Enl]>0

Have fun tuning

Andy

[Sarhan]

Hello Andy,

Is there a filter to set the hit counts like for Max and Min

Thanks

Sarhan

[Mirrmu]

top stuff Andy

[whittlebeast]

Here is a speech I did at a Megasquirt Meet with the matching PDF regarding understanding MLV data.

Megasquirt

http://www.nbs-stl.com/MLVDemo/MLVHD%20Demo.pdf

Andy

[Sarhan]

 

[whittlebeast]

Just for fun, I was playing with some data that a friend got at an autocross, from his Honda Civic.  This is coming from his SoloStorm software on his Android connected with bluetooth to a QStarz GPS.

http://www.nbs-stl.com/MLVDemo/GAX5-Sean-4.png

On the left is what is known as the traction circle. See http://www.formula1-dictionary.net/traction_circle.html

On the right is the path he drove in about 45 sec.

Here is the matching video

https://www.youtube.com/watch?v=fIEXEbI3Qk4

Andy

[whittlebeast]

Just for fun, here is a data log screen shot off my newest motor after coming off a warmup and  about 4 min on track.

http://www.nbs-stl.com/CRX/CRX%20Basic%20Usage.png

Here is what 3 typical sweeps of a WOT dyno sweeps will cover.

http://www.nbs-stl.com/CRX/Dyno%20Pull%20AFR.png

I learned a ton of info on track that I would never have found on the dyno.  I will post a data log after I have a few more real world data logs.

Here is a fuel pressure WOT test.

https://www.youtube.com/watch?v=uABr5xN0uPE

Have fun tuning.

Andy