ESE's works engine tuner

[rtechracing]

$39 USD later, and without further ado:


SAE 930503

Harari, R., Sher, E., The Effect of Ambient Pressure on the Performance Map of a Two-Stroke SI Engine
-SAE International Congress & Exposition, Detroit,MI, Pg 115-123, 01 March 1993.

(attached)

Would you like me to split the cost with you?

Do you have the SAE paper 890836 as well?

[ApolloMotoMoto]

Would you like me to split the cost with you?

Do you have the SAE paper 890836 as well?

Thats quite alright, I wanted it for my own records as well.

If you can get PerformanceTrends to include the FOS 2-Stroke correction factor in their Dyno software, I would consider that payment in full

I can not find SAE 890836 available as a free download anywhere so far;

It is available for direct purchase from the SAE MOBIUS here:

https://www.sae.org/publications/tec...ontent/890836/

[rtechracing]

Thats quite alright, I wanted it for my own records as well.

If you can get PerformanceTrends to include the FOS 2-Stroke correction factor in their Dyno software, I would consider that payment in full

I can not find SAE 890836 available as a free download anywhere so far;

It is available for direct purchase from the SAE MOBIUS here:

https://www.sae.org/publications/tec...ontent/890836/

I am in dialog with Performance Trends. I get the impression that they are willing to do it since they asked also for 890836 as it was refered to in one of the other SAE papers

[rtechracing]

Thats quite alright, I wanted it for my own records as well.

If you can get PerformanceTrends to include the FOS 2-Stroke correction factor in their Dyno software, I would consider that payment in full

I can not find SAE 890836 available as a free download anywhere so far;

It is available for direct purchase from the SAE MOBIUS here:

https://www.sae.org/publications/tec...ontent/890836/

I bought the SAE 890836 so if anyone would like a copy, please explain how I add it to a post

[husaberg]

please explain how I add it to a post

https://www.kiwibiker.co.nz/forums/a...hmentid=309281

[ApolloMotoMoto]

I bought the SAE 890836 so if anyone would like a copy, please explain how I add it to a post

Awesome!

Thank you very much!

The team I work with has also been in contact with PerformanceTrends, and we also requested that they add the FOS 2-Stroke correction factor.

Hopefully with enough pressure and with the support of the published data they will see fit to add it to their software.

[SwePatrick]

I noticed you were talking about jetting and such, i´ll contribute with my redneck method of getting a lectron into the ballpark if having just one metering rod, and don't want to buy so many before getting it right =)



And the missing part:


Lastly, the result, not fully tuned yet, but full throttle seems to get close.

[wobbly]

So Patrick ,after you telling the internet with absolute certainty, I was completely wrong about dyno losses , now suddenly - quote " I dont know".
As I told you several times, doing a run down with the clutch pulled in, is not even remotely a valid test of this metric.
SportDevices has an easily accessed % transmission losses entry page under Corrections - where you can enter 15% or anything that will give you the data as seen as crank power in your simulation.

[ApolloMotoMoto]

I am happy to report, thanks to R-Tech Racing's efforts and the collegiate sharing of research...

PerformanceTrends just sent over a new version of their Dyno DataMite Software for validation testing.
-Updated to include FOS 2-Stroke Weather Correction Factor!

Assuming all works as expected, the new update should be available for download pretty soon.

Thank you Frits, Wayne and R-Tech Racing!

We had honestly given up hope, and were preparing to purchase the SportsDevices DAQ and Software.

This success saves my team ~$1,000 USD that we had basically already commited to spending.

We are VERY excited to have this result.

[wobbly]

I have sent 2 screen shots with differing weather to Rein, showing the FOS corrections to send to Performance Trends so they can confirm the code changes needed are correct.

[ApolloMotoMoto]

I have sent 2 screen shots with differing weather to Rein, showing the FOS corrections to send to Performance Trends so they can confirm the code changes needed are correct.

As part of the conversation, we had shared many screenshots of comments you and Frits had made on the subject, here and on Facebook.
-screenshot included

Your input was important in getting this across the finish line.

[Frits Overmars]

I am happy to report, thanks to R-Tech Racing's efforts and the collegiate sharing of research... PerformanceTrends just sent over a new version of their Dyno DataMite Software for validation testing -Updated to include FOS 2-Stroke Weather Correction Factor! Thank you Frits, Wayne and R-Tech Racing!We are VERY excited to have this result.

I am VERY happy to hear it ApolloMotoMoto.
One small remark: I call it the FOS two-stroke air density correction factor instead of weather correction factor. Thankfully most dyno rooms are shielded from the weather so the air temperature and pressure in a good dyno room can adjusted independent from the weather.

[Frits Overmars]

Of course there are exceptions

Before anyone gets the wrong impression: I have the utmost respect for Neil's achievements but these pics were too nice not to use them

[41juergen]

I am VERY happy to hear it ApolloMotoMoto.
One small remark: I call it the FOS two-stroke air density correction factor instead of weather correction factor. Thankfully most dyno rooms are shielded from the weather so the air temperature and pressure in a good dyno room can adjusted independent from the weather.

Sorry Frits, the search function makes me nuts, can you share that again, I would try to see if DynoJet would also implement that in their software..

Edit: done, got that already from Neels... thank's a lot!

[wobbly]

Me thinks you are spoiled rotten by the SOTA apparatus at Aprilia Frits.
The only " shield " most dyno rooms have from the ambient weather is the workshop front door.
If I could be bothered , the best/worst pics of Neil is a couple showing his knees in his mid winter shorts - a horror nightmare show not many have survived psychologically intact.

I wonder out loud if the code guy at Performance Trends didnt want people ringing him and mistakenly calling him Richard.
Really glad prodding the Bear actually worked in this case.

For those people who have not actually seen the FOS code in action , here is a shot of the real time screen on my dyno.
The SportDyno digital weather station is calibrated to the local airport, about 5Km away.