Thanks to Vit and Spectacle for sharing the images. Unfortunately, I won't be able to see the ones on Fullavit.com until I go home tonight.

I'm very surprised at how well the soft dyno's plot matched up with the shape of Spectacle's torque curve. I didn't think it would be nearly that close, considering the low sample rate. The magnitude of the numbers being close is just a coincidence, since the soft dyno is "calibrated" to a lightly loaded S2000 on a flat road in 3rd gear.

 

BTW, I added another feature yesterday that allows you to do multiple 3rd gear pulls in succession, and combine them into 1 pull. The purpose is to allow higher resolution on the curve for "fine tuning". Since single datalogs require significant smoothing to filter out "noise", using the average of multiple plots will give a better curve with less smoothing, so it will show finer detail in the torque curve that would have otherwise been smoothed out.

You need to do 3 pulls, load them in the soft dyno, check the "Show Average" check box, then adjust the smoothing and sample RPM spinners until the single average plot looks "right". Then you can save that averaged plot by clicking the "Save Average" button. It will be saved with the same name as the 2nd datalog (blue), but with "AVG" tagged on the end of the file name.

 

gernby, thanks for making this available to the community. I've emailed gernby and read a lot of his posts. He's not all-knowing, but he's educated, he's quite skilled, and he's spent a lot of time putting this together and improving it.

There are more accurate tools; a dyno is better. And the eDyno is an alternative with its own costs and benefits. But the thread isn't about the alternatives and what is better; it's about gernby freely giving his tool to us. I'm pleased that this forum (s2ki) consistently is able to avoid sparking arguments when they aren't productive. It makes a much better forum environment.

This is really excellent free, "as is" software that lets FlashPro users produce basic plots from the contents of our datalog outputs and use that to refine basic street tunes. It makes a street tune better, and it's fun to tinker with. Thanks for sharing it.

 

Thanks Ace! You and SilverBullet seem to be the only ones who have tried it. I thought I would have gotten more feedback.

 

gernby - sent you another .csv

 

Sweet! I'll check it out on Tuesday, since I'm scrambling to get ready for a track day on Monday.

 

I've used it, but sadly, not very much lately. Good stuff though Greg!

 

Unfortunately, this datalog doesn't work well either, since it appears to not just be a single WOT pull. The soft dyno scans the datalog for the first record with 100% throttle, then uses all the records after that until it finds another that is not 100%. In this datalog, there will be some records at 100% throttle, then light throttle, then more at 100%, then light throttle, repeat, repeat.

It also looks like you might have a bad TPS, since I see 1 record (line 642) where TPS shows 0 even though the record immediately before and after are 100%. I don't think you could move your foot that fast!

 

Why does that sound wrong? Full throttle, shift (foot off gas), Full throttle.

For your program, just cut out the 3rd gear or 4th gear portion of the log and use that.

 

I will try that, but I suspect the RPM range will be short. Normally, a dyno pull is more than just a couple thousand RPMs. I try to do 2K to redline in 3rd gear with no shifting.