Page 2684 of 2691 FirstFirst ... 1684218425842634267426822683268426852686 ... LastLast
Results 40,246 to 40,260 of 40355

Thread: ESE's works engine tuner

  1. #40246
    Join Date
    8th February 2007 - 20:42
    Bike
    TZ400
    Location
    tAURANGA
    Posts
    4,054
    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.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	FOS 2.JPG 
Views:	138 
Size:	351.1 KB 
ID:	355489  
    Ive got a thing thats unique and new.To prove it I'll have the last laugh on you.Cause instead of one head I got two.And you know two heads are better than one.

  2. #40247
    Join Date
    25th March 2004 - 17:22
    Bike
    RZ496/Street 765RS/GasGas/ etc etc
    Location
    Wellington. . ok the hutt
    Posts
    21,046
    Blog Entries
    2
    I was using the same dynojet for maybe 25 years but running it myself for 10-15, heck time flies. Mostly it was arrive after dinner, roller door up, dirty big fan on, rug up of it was cold.
    Turn off any correction. What you did that night was measured in apples so improvement (or usually deprovements) could be measured. Previous runs were taken with grain of salt.

    For a short while Chris built a room in room with extraction and inlet. Didn't know we were born.
    Don't you look at my accountant.
    He's the only one I've got.

  3. #40248
    Join Date
    20th April 2011 - 08:45
    Bike
    none
    Location
    Raalte, Netherlands
    Posts
    3,389
    Quote Originally Posted by 41juergen View Post
    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!
    Thanks Neels.
    You can find the 'FOS two-stroke air density correction factor.PDF' in 'FOS tips & concepts':
    https://onedrive.live.com/?authkey=%...D58EFB966FB3DC

    Quote Originally Posted by Frits Overmars View Post
    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.
    Quote Originally Posted by wobbly View Post
    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.
    You should have seen my dyno room in 1978: an inertia flywheel built out of two tractor flywheels welded back to back, plus a Heenan & Froude water brake, salvaged from a technical university that was going to throw it away after 20 years of service, coupled to a central heating radiator with long hoses, so I could put the radiator outside the dyno room in summer and inside in winter.
    There was a blower for engine cooling that accidentally cooled the exhaust pipe more than the engine radiator, which taught me not to cool the pipe too much, and a fumes extractor, sucking the exhaust gases through a giant bong that caught most of the smoke and smell in order to keep the neighbours at peace. Finetuning of cabin temperature and pressure was done by opening the door more or less, provided there was no one else in the building trying to make a phone call.

    The Aprilia dyno department was a somewhat different kettle of fish. Controlling the air humidity was taken care of by an air conditioner that cooled all incoming air, condensing the water vapor, and then heating that air up again to the required temperature. That airco consumed about as much electricity as Aprilia's home town Noale.
    Click image for larger version. 

Name:	Aprilia 1.JPG 
Views:	100 
Size:	16.4 KB 
ID:	355500Click image for larger version. 

Name:	Aprilia 2.jpg 
Views:	93 
Size:	106.5 KB 
ID:	355499Click image for larger version. 

Name:	Aprilia 3.jpg 
Views:	96 
Size:	109.9 KB 
ID:	355498Click image for larger version. 

Name:	Aprilia 4.jpg 
Views:	92 
Size:	104.3 KB 
ID:	355497Click image for larger version. 

Name:	Aprilia 5.jpg 
Views:	106 
Size:	170.9 KB 
ID:	355501Click image for larger version. 

Name:	Aprilia 6.jpg 
Views:	143 
Size:	87.8 KB 
ID:	355502

  4. #40249
    Join Date
    25th January 2019 - 01:33
    Bike
    ´08 GSXR1000 / ´90 GSXR7-11 / '92 RGV250
    Location
    Southwest of Germany
    Posts
    26
    Blog Entries
    1
    ... just to make you guys a little jealous, that's where I work

    Click image for larger version. 

Name:	Pruefstand.jpeg 
Views:	210 
Size:	527.9 KB 
ID:	355503

  5. #40250
    Join Date
    11th May 2024 - 06:49
    Bike
    Full Custom 90cc 2 Stroke Road Racer
    Location
    United States, CA
    Posts
    42
    Quote Originally Posted by wobbly View Post
    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.

    (...)

    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.
    Heya Wayne, I just got an email from PerformanceTrends this moring saying they had not received these two screenshots from the SportsDevices software so they can confirm the code is working properly;


    Can you post that other screenshot here?

    ***EDIT***

    -JUST NOW received another email from PerformanceTrends, they just got the email with the SportsDevices screenshots (both of them)

    Thanks again!

  6. #40251
    Join Date
    11th May 2024 - 06:49
    Bike
    Full Custom 90cc 2 Stroke Road Racer
    Location
    United States, CA
    Posts
    42
    Looks like PerformanceTrends received everything they needed to confirm the code was working as intended;

    PerformanceTrends Dyno DataMite Version 4.2 B.045 was just released today.

    Changelog Entry:

    ----- Jan 14, 2025 Version 4.2 B.045 -----------------------------
    Added 2 stroke FSO correction factor, Pro or Enterprise Dyno versions
    only.



    ...lol at the typo in the changelog, should be FOS, not FSO...
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Screenshot (520).png 
Views:	50 
Size:	188.4 KB 
ID:	355505  

  7. #40252
    Join Date
    8th February 2007 - 20:42
    Bike
    TZ400
    Location
    tAURANGA
    Posts
    4,054
    HaHa - Frits's Sublime Offerings - FSO, I think we should keep it.

    I assume that whole facility at Aprilia is still in operation Frits ?
    Ive got a thing thats unique and new.To prove it I'll have the last laugh on you.Cause instead of one head I got two.And you know two heads are better than one.

  8. #40253
    Join Date
    21st March 2014 - 22:00
    Bike
    RZ350, TZR250 3XV, TZR250 3MA, TZR125
    Location
    Hanau, Germany
    Posts
    152
    Quote Originally Posted by Frank S. View Post
    ... just to make you guys a little jealous, that's where I work

    Click image for larger version. 

Name:	Pruefstand.jpeg 
Views:	210 
Size:	527.9 KB 
ID:	355503
    Ok, only Horiba setup, one can do better.. (just a joke, looks very nice!)

  9. #40254
    Join Date
    20th April 2011 - 08:45
    Bike
    none
    Location
    Raalte, Netherlands
    Posts
    3,389
    Quote Originally Posted by wobbly View Post
    HaHa - Frits's Sublime Offerings - FSO, I think we should keep it.
    I finally thought I had a chance to become world famous and then all the credits go to a Polish Car Manufacturer
    Click image for larger version. 

Name:	FSO Polonez.png 
Views:	13 
Size:	284.9 KB 
ID:	355511

  10. #40255
    Join Date
    20th April 2011 - 08:45
    Bike
    none
    Location
    Raalte, Netherlands
    Posts
    3,389
    Quote Originally Posted by Frank S. View Post
    ... just to make you guys a little jealous, that's where I work
    Click image for larger version. 

Name:	Pruefstand.jpeg 
Views:	210 
Size:	527.9 KB 
ID:	355503
    Allrad-Prüfstand, auch nicht schlecht. Now we just have to wait for the first 4-wheel drive motorcycle at KiwiBiker . Neil Hintz, are you there?

  11. #40256
    Join Date
    25th January 2019 - 01:33
    Bike
    ´08 GSXR1000 / ´90 GSXR7-11 / '92 RGV250
    Location
    Southwest of Germany
    Posts
    26
    Blog Entries
    1
    Quote Originally Posted by Frits Overmars View Post
    Allrad-Prüfstand


    We also have a few engine test benches, but unfortunately not a single 2-stroke engine in the entire company
    I had to take an official picture because posting my own photos would be quite bad for my career
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	FMP.jpg 
Views:	97 
Size:	118.5 KB 
ID:	355512  

  12. #40257
    Join Date
    13th September 2016 - 00:30
    Bike
    a lot
    Location
    somewhere over the rainbo
    Posts
    26
    Quote Originally Posted by Frits Overmars View Post
    The Aprilia dyno department was a somewhat different kettle of fish. Controlling the air humidity was taken care of by an air conditioner that cooled all incoming air, condensing the water vapor, and then heating that air up again to the required temperature. That airco consumed about as much electricity as Aprilia's home town Noale.
    Hi Frits,

    If I recall an older comment of yours correctly, the tests were performed at 25°C.
    Did you add water after removing all of it? Or did you operate the engines as 0% relative density?
    Because humidity has a big influence on knocking!

    I am asking, since modern car engines have a map sensor that is measuring not only temperature and pressure, but also humidity.

    BR
    Chris

  13. #40258
    Join Date
    20th April 2011 - 08:45
    Bike
    none
    Location
    Raalte, Netherlands
    Posts
    3,389
    Quote Originally Posted by _____ View Post
    Hi Frits, If I recall an older comment of yours correctly, the tests were performed at 25°C.
    Did you add water after removing all of it? Or did you operate the engines as 0% relative density? Because humidity has a big influence on knocking!
    I am asking, since modern car engines have a map sensor that is measuring not only temperature and pressure, but also humidity.
    BR Chris
    In practice, you don't always need to remove all the water but only bring the relative humidity to the desired value. Sometimes you have to remove water to do that, sometimes you even have to add it.

    I didn't know about a MAP sensor that measures temp, pressure and humidity. Do you have any further information on that?

  14. #40259
    Join Date
    11th May 2024 - 06:49
    Bike
    Full Custom 90cc 2 Stroke Road Racer
    Location
    United States, CA
    Posts
    42
    So, the team is pretty close to running the first validation pulls on our brand new inertia dyno, and I have a question for those with knowledge and experience using a simple inertia dyno (with fixed flywheel mass and no braking) to develop 2 stroke engines...

    PerformanceTrends says in their documentation that the flywheels inertia should be "sized" such that the "acceleration time" of a "full pull" to maximum RPM should take between 5 to 10 seconds in order to get "good accuracy".

    Quote:

    "You need an acceleration time of 5 to 10 seconds for good accuracy."

    They ALSO SAY:

    "Use moderate acceleration rates, like 300-500 engine RPM per second. Very quick acceleration rates, like 1000 RPM per second are less accurate."

    I am assuming a pull of less than 5 seconds is not going to suffieciently load the engine to accurately measure the total torque capacity?
    -What insight can those with actual experience provide for this "bottom threshold" for the time, in seconds, of a pull on an inertia dyno.

    Next up, what about the 10 seconds on the top side of their range?
    -Why would pull times exceeding 10 seconds detrimentally effect accuracy?
    -I have seen recommendations for longer pulls on 2 stroke engines to allow the pipe to sufficient heat through the pull, but I dont recall what the time in seconds was recommended to be...?
    -again, any insight can be provided on this "top threshhold" for acceleration time?

    If I use the "moderate acceleration rate" recommendation, for the pulls I want to do, we are talking pulls from 4k - 16k RPM; thats a sweep of 12,000 RPM's...

    12,000 / 300 RPM per second = 40 seconds

    12,000 / 500 RPM per second = 24 seconds

    12,000 / 1000 RPM per second = 12 second (already longer than 10....)

  15. #40260
    Join Date
    3rd January 2012 - 01:25
    Bike
    -
    Location
    -
    Posts
    289
    Quote Originally Posted by ApolloMotoMoto View Post
    So, the team is pretty close to running the first validation pulls on our brand new inertia dyno, and I have a question for those with knowledge and experience using a simple inertia dyno (with fixed flywheel mass and no braking) to develop 2 stroke engines...
    Use an acceleration time that is equivalent to what you are going to have when you ride it. Ideal case: the acceleration time in each gear is the same on the dyno and on the road. For that to be the case the roller has do be twice the weight of the bike including rider.

    As long as you are unsure about jetting and ignition timing, fuel supply etc, use a shorter acceleration time as it is less likely to destroy an engine with lighter load. Once you are more comfortable with the setting you can switch to longer pulls, using a higher gear. Extra long / longer acceleration times would be the equivalent to driving uphill and vice versa.

Thread Information

Users Browsing this Thread

There are currently 20 users browsing this thread. (0 members and 20 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •