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EDOUARD Jean
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 [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5)

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AuteurMessage
JanBros



Nombre de messages : 256
Localisation : Belgique
Date d'inscription : 05/12/2011

[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 36 Empty
MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5)   [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 36 Icon_minitimeLun 18 Nov 2019 - 19:18

My 2-stroke spreadsheet is ready  (for now at least), so I'm throwing it on the net so everybody can use it.
It contains pages for ports, the head and FOS pipe
On the seperate ports pages (exhaust and transfer),  it calculates the STA numbers (Specific Time.Area) of your ports and you can matcch them to the target's, determinned by the BMEP
On the Head page, you can design your head and it calculates the MSV (Mean Squish Velocity) 100% accurtly with Blair
On the FOS-pipe page, it calculates a Frits Overmars FOS pipe, and you can ad a Wobbly-duct , and you can add extra header/diffusor/baffle sections to the pipe.

you are free to do with it what you want, as long as it is not for commercial use. If somebody has idea's to improve or add extra features, please share so we can all benefit.
In the manual I've tried to explain how it works, please read it first before you ask questions.
If anybody has any clue on how to print portmap's to actual size, please let me know, as I have absolutly no idea.

En francais :
mon tableau excel 2-temps est prêt, donc je le met disponibles pour tous le monde.
Il y a des pages pour les portes (échapement et transfert) qui calcules les Time.Area Spécifique et vous pouvez modeler vos portes qu'ils correspondent avec les objectifs déterminés par le PME
Il y a une page pour modeler la chambre de combustion
et une page qui calcule des échapement FOS par Frits Overmars, ou vous avez la possibilité d'ajouter un "Wobbly-duct" et des troncon? en plusieurs parties.

vous pouvez faire avec l'excel ce que vous voulez, que pour des l'utilisations commerciales. si quelqu'un a des idées pour l'amméliorer, laisse nous savoir que tous le monde s'en peut profiter.
Désoler qu'il n'y a pas de manuel en francais, ce serait trop compliquer pour moi et peut être vous n'en comprendré rien du tous lol! Si quelqu'un a envie de le traduire ... ?
si quelqu'un sait comment imprinter des "portmap" en "taille réelle", laisse moi savoir svp, parce que pour le moment j'ai aucune idée.

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excel : [Vous devez être inscrit et connecté pour voir ce lien]
manual : [Vous devez être inscrit et connecté pour voir ce lien]


Dernière édition par JanBros le Lun 18 Nov 2019 - 19:43, édité 1 fois
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JanBros



Nombre de messages : 256
Localisation : Belgique
Date d'inscription : 05/12/2011

[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 36 Empty
MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5)   [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 36 Icon_minitimeLun 18 Nov 2019 - 19:26

double
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carlovitch1



Nombre de messages : 290
Localisation : Pays Catalan
Date d'inscription : 20/05/2018

[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 36 Empty
MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5)   [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 36 Icon_minitimeLun 18 Nov 2019 - 21:04

Merci JanBros !
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Frits Overmars

Frits Overmars

Nombre de messages : 2271
Age : 71
Localisation : Raalte, Holland
Date d'inscription : 12/10/2010

[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 36 Empty
MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5)   [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 36 Icon_minitimeLun 18 Nov 2019 - 22:20

JanBros a écrit:
My 2-stroke spreadsheet is ready  (for now at least), so I'm throwing it on the net so everybody can use it.... you are free to do with it what you want, as long as it is not for commercial use.
excel : [Vous devez être inscrit et connecté pour voir ce lien]
manual : [Vous devez être inscrit et connecté pour voir ce lien]
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 36 241515 Bravo Jan! I know that it has been a tremendous amount of work.
I noticed that you refer to my 'Leaning Tower of Pisa' story. If you wish, you can download the complete Pisa-story from [Vous devez être inscrit et connecté pour voir ce lien] , from the folder 'FOS Tips & Concepts', and bundle it with your masterpiece. In fact, you can use everything you find there and use it, provided credits are respected.
You might also take a look at the disclaimer accompanying the 'FOS Exhaust Concept'; it is a little more extensive than the older version that you quoted.
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 36 771973
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JanBros



Nombre de messages : 256
Localisation : Belgique
Date d'inscription : 05/12/2011

[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 36 Empty
MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5)   [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 36 Icon_minitimeMar 19 Nov 2019 - 22:24

apparently I seem to make the same mistake over and over : I keep forgetting the variable for the FOS pipe is speed of sound and not exhaust gas temperature. It had no effect on the workings of it all, but I've corrected it now in the manual and the spreadsheet and uploaded corrected versions ;-)

apparament, je fait le même erreur toujours : c'est pas le température du gaz de l'échapement, mais la vitesse du son (?) qui est le variable dans le concept FOS pour les pipes. ça ne changerait riens pour les calcules, mais je l'ai changer maintenant dans le manuel el l'excel et mit en ligne des versions correct.

excel : [Vous devez être inscrit et connecté pour voir ce lien]
manual : [Vous devez être inscrit et connecté pour voir ce lien]
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Toop



Nombre de messages : 3550
Age : 19
Localisation : Tours
Date d'inscription : 02/01/2010

[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 36 Empty
MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5)   [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 36 Icon_minitimeMar 19 Nov 2019 - 23:31

Great work !
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carlovitch1



Nombre de messages : 290
Localisation : Pays Catalan
Date d'inscription : 20/05/2018

[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 36 Empty
MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5)   [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 36 Icon_minitimeMer 27 Nov 2019 - 10:36

Good morning All!

I have a question for Frits about the Helmholtz resonator concept.
Can we consider that the attempt from Yamaha with the YEIS system fitted on a certain number of road bikes is an exploitation of this concept?
If yes, is there a way to make it really work (I understand from what I could hear or read that it is not making any outstanding difference in performance)?
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Frits Overmars

Frits Overmars

Nombre de messages : 2271
Age : 71
Localisation : Raalte, Holland
Date d'inscription : 12/10/2010

[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 36 Empty
MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5)   [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 36 Icon_minitimeMer 27 Nov 2019 - 14:07

carlovitch1 a écrit:
Good morning All! I have a question for Frits about the Helmholtz resonator concept.
Can we consider that the attempt from Yamaha with the YEIS system fitted on a certain number of road bikes is an exploitation of this concept? If yes, is there a way to make it really work (I understand from what I could hear or read that it is not making any outstanding difference in performance)?
Good afternoon Carlovitch1. The physics principles decribed Hermann von by Helmholtz do play a role in the functioning of the Yahama Energy Induction System, but the aim is somewhat different. A Helmholtz resonator is usually applied with the objective of achieving the strongest possible resonance at a given frequency; the YEIS was developed to spread useful power over the widest possible range.
There is a way to make it work, but I feel I have already tried to explain this a thousand times, so you may have to do some searching yourself. Maybe this helps:
Google can search for a specific search term in a specific website with the site: function. For example:
Yamaha YEIS site:http://www.pit-lane.biz
And if all goes well, you will find something like this:
[Vous devez être inscrit et connecté pour voir ce lien]
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carlovitch1



Nombre de messages : 290
Localisation : Pays Catalan
Date d'inscription : 20/05/2018

[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 36 Empty
MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5)   [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 36 Icon_minitimeMer 27 Nov 2019 - 15:30

OK, thanks a lot Frits for your quick reply !
I was really doubtful about whether this YEIS was a marketing gadget or something valid, potentially useful. Looks like there was some research behind it because there's a SAE publication (N° 810923) about it but I did not purchase it (maybe someone has it?).
Thanks for the links, I will dig by myself.

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Döllinger



Nombre de messages : 76
Localisation : Biblis
Date d'inscription : 14/01/2017

[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 36 Empty
MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5)   [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 36 Icon_minitimeSam 30 Nov 2019 - 19:08

Hallo,

right as I´m nearly finished with my own Powerjet someone offered me 2 Dellorto VHSJ42 carburettors including the calculation programm.
Got someone here information about these carburettors? I´m glad about every information. (jetting, parts, history, ...)
The carbs use the GP-atomizer, got pulsed PJ, a special formed slide, use AK-series needles and are cast magnesium.
Someone got a source for jetting parts?
Best regards,
Bernd
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carlovitch1



Nombre de messages : 290
Localisation : Pays Catalan
Date d'inscription : 20/05/2018

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Did you try to simply contact Dellorto ?https://www.dellorto.it/it/prodotti/carburatori/
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[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5)
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