AccueilGalerieRechercherS'enregistrerConnexionNouveaux messages depuis dernière visite
Rechercher
 
 

Résultats par :
 
Rechercher Recherche avancée
Qui est en ligne ?
Il y a en tout 54 utilisateurs en ligne :: 19 Enregistrés, 0 Invisible et 35 Invités :: 2 Moteurs de recherche

4cylindres, Albe, Ch.VOIGNIER, dbu, Dukasuz, Emmanuel Laurentz, franckfranck, knacki, Le Xav, Lolo49, luigino.g, MVF, Patrick63, Philip, popov1100, raspoutine, ricou, Toop, yves kerlo

Le record du nombre d'utilisateurs en ligne est de 294 le Lun 18 Nov 2019 - 20:11
Derniers sujets
» [Endurance] 24 heures du Mans 2020
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeAujourd'hui à 22:41 par yves kerlo

» [Oldies] Spa-Francorchamps jusqu'à 1972...
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeAujourd'hui à 22:18 par Adco

» [Techniques] Ça m’intéresse, composites et polymères
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeAujourd'hui à 22:17 par sdvs

» [Oldies] Les Cagiva de Grand prix, toute une histoire...
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeAujourd'hui à 21:49 par yves kerlo

» [Oldies] Quizz??????
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeAujourd'hui à 21:35 par L.M.

» Les lumieres de l'allumage
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeAujourd'hui à 21:24 par Atch

» [Oldies] KR250, la genèse d'un mythe ...
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeAujourd'hui à 21:24 par fullgazlolo

»  [Technique] La FPE-JBB, une 250 deux temps française...
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeAujourd'hui à 21:04 par Ed

» [Oldies] Jean François Baldé
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeAujourd'hui à 20:42 par biger

» Olivier Chevalier, 40 ans déjà...
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeAujourd'hui à 19:32 par JH42

» [MotoGP] GP 2019 / 20 , infos , nouveautés , résultats des tests , potins et ....
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeAujourd'hui à 19:29 par Fügner

» [Oldies] Motocistes d'époque
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeAujourd'hui à 18:04 par Dialmax

» [MotoGP] 2020
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeAujourd'hui à 13:55 par Pasky

» [Oldies] C'était le bon temps...
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeAujourd'hui à 12:34 par bialbero

» [2 stroke] Et celui la ? (Astier)
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeAujourd'hui à 6:59 par EDOUARD Jean

» [Oldies] Les Voyages de Gulliver
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeHier à 23:04 par Ch.VOIGNIER

»  [Road Racing] 2020
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeHier à 21:26 par mickey

» [Oldies] Quand le Tourist Trophy etait un GP : TT 1952, TT 1970, TT 1967, TT 68....
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeHier à 20:48 par Loveside

» Anderstorp 1972
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeHier à 19:24 par Loveside

» [Oldies] Angel Nieto Mike Hailwood (part 6)
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeHier à 19:04 par philwood

» [Oldies] Les aventures de Guy Bertin, toute une histoire...
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeHier à 18:46 par PLP

» [Oldies] Norton Commando de piste et leurs différents cadres
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeHier à 16:50 par Veeline

» [Oldies] 50cc de vitesse : Toute leur histoire ! (partie 2)
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeHier à 16:20 par Philippe HENRION

» [Oldies] Championnat d'Europe 1981-2008
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeHier à 16:18 par tripotemascagne

» [Oldies] L'incroyable histoire de Kaaden et Degner! (MZ)
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeHier à 13:15 par Apriliabarth

» [Oldies] Honda 500 RC 181
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeHier à 11:49 par Apriliabarth

» Doutes concernant éditions passées du Grand Prix de France (et pas seulement...)
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeSam 4 Avr 2020 - 20:54 par Niggi46

» [Oldies] Restauration de mon side-car des années 1974/1975 (chassis court)
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeSam 4 Avr 2020 - 18:16 par EDOUARD Jean

» [Oldies] Les motos JBB, toute une histoire...
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeSam 4 Avr 2020 - 15:59 par Dan42

» [WSBK] Magny-Cours 2019 , les 27 - 28 et 29 sept 2019 .
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Icon_minitimeSam 4 Avr 2020 - 13:06 par mickey

La réclame...
Mots-clés
charade wanted 2013 aermacchi honda zone 1976 triumph eurosport 1980 geco ROAD bourg france daytona rouge 1973 yamaha classic suzuki aprilia RACING bresse side ducati race
Meilleurs posteurs
Marc
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting16[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting13[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting15 
philwood
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting16[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting13[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting15 
EDOUARD Jean
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting16[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting13[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting15 
Pierre"PhilRead"
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting16[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting13[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting15 
mickey
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting16[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting13[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting15 
Fügner
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting16[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting13[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting15 
Jarno
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting16[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting13[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting15 
yves kerlo
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting16[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting13[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting15 
Dialmax
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting16[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting13[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting15 
bubu
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting16[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting13[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 Voting15 
La réclame...
Le Deal du moment : -25%
APPLE Écouteurs sans fil AirPods 2
Voir le deal
135 €

 

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

Aller en bas 
Aller à la page : Précédent  1 ... 21 ... 38, 39, 40
AuteurMessage
Frits Overmars

Frits Overmars

Nombre de messages : 2302
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 40 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 40 Icon_minitimeJeu 26 Mar 2020 - 18:35

josh20 a écrit:
Frits FOS uses Squish Gap and the Squish Center Gap (What i guess is the inner point at the beginning of the Bowl?) to see if the Gap is Parallel or opens Conical.
You guessed right, Josh.
Citation :
So my conclusion is at the moment, the most common told 25-50m/s MSV is a static Value and at least a bit useless... because in the enginge its very dynamic.
Right again.
Revenir en haut Aller en bas
josh20



Nombre de messages : 9
Localisation : Germany
Date d'inscription : 05/01/2018

[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 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 40 Icon_minitimeVen 27 Mar 2020 - 9:36

Frits Overmars a écrit:
josh20 a écrit:
Frits FOS uses Squish Gap and the Squish Center Gap (What i guess is the inner point at the beginning of the Bowl?) to see if the Gap is Parallel or opens Conical.
You guessed right, Josh.
Citation :
So my conclusion is at the moment, the most common told 25-50m/s MSV is a static Value and at least a bit useless... because in the enginge its very dynamic.
Right again.

Thank you Mr.Overmars,
i hope you dont mind if i ask another question(s)?

How would it affect the Detonationrisk at Partial Load if the Head is modified to more "Race-specs"?
Because my 500 is rather an Countryroad-Hunter than a Racebike, so it runs often on low load/partial load.
i have the feeling it could be risky. As running long on low throttle openings is not what powerfull Twostrokers like in general...
And would a variable Tailpipe (like your Idea that you posted here) could be usefull for this "low Load"case?
I´m thinking to build some kind of exhaust pressure reduction system in connection to throttle opening, like Cruising around= bigger Tailpipe / Full Throttle = normal Tailpipe.

Best Regards
Josh

Revenir en haut Aller en bas
Frits Overmars

Frits Overmars

Nombre de messages : 2302
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 40 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 40 Icon_minitimeVen 27 Mar 2020 - 12:04

josh20 a écrit:
Thank you Mr.Overmars, i hope you dont mind if i ask another question(s)? How would it affect the Detonationrisk at Partial Load if the Head is modified to more "Race-specs"? Because my 500 is rather an Countryroad-Hunter than a Racebike, so it runs often on low load/partial load. i have the feeling it could be risky. As running long on low throttle openings is not what powerfull Twostrokers like in general...
And would a variable Tailpipe (like your Idea that you posted here) could be usefull for this "low Load"case? I´m thinking to build some kind of exhaust pressure reduction system in connection to throttle opening, like Cruising around= bigger Tailpipe / Full Throttle = normal Tailpipe.
Josh, it's very kind of you to address me as Mr. Overmars, but just 'Frits' is good enough for me, 'Mr. Overmars' was my beloved father.
I have no idea what 'Race-specs' are supposed to be; it could mean anything. Maybe you mean a high comression ratio; that would work in a four-stroke, although I would not recommend it for a two-stroke. I'd rather concentrate on an effective, tight squish gap.
My variable tailpipe, shown below, was designed with two objectives in mind: to reduce the torque dip at 2/3 of max.torque-rpm, and to avoid part-throttle detonation. I like your suggestion of using it in connection to throttle opening.
[Vous devez être inscrit et connecté pour voir ce lien]
Revenir en haut Aller en bas
josh20



Nombre de messages : 9
Localisation : Germany
Date d'inscription : 05/01/2018

[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 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 40 Icon_minitimeVen 27 Mar 2020 - 13:03

Frits Overmars a écrit:

Josh, it's very kind of you to address me as Mr. Overmars, but just 'Frits' is good enough for me, 'Mr. Overmars' was my beloved father.
I have no idea what 'Race-specs' are supposed to be; it could mean anything. Maybe you mean a high comression ratio; that would work in a four-stroke, although I would not recommend it for a two-stroke. I'd rather concentrate on an effective, tight squish gap.
My variable tailpipe, shown below, was designed with two objectives in mind: to reduce the torque dip at 2/3 of max.torque-rpm, and to avoid part-throttle detonation. I like your suggestion of using it in connection to throttle opening.

If its ok for you with Frits, i stay with that...

With "Race-Specs" i meant not high compression...i´ve read already much about this in your Posts (within the low-comp Racer from Langtuning(?) and so on)

I meant more that usually for Roaduse built Twostroker like an TZR/TDR/RGV250 or something like this, is more on an Conservative side of Headdesign... a bit bigger on Gap,a bit lower on Comp,a bit smaller on Area and so on because its for roaduse with maybe not very experienced riders,sometimes bad fuel,lots of low load riding and it should last longer...
If you give such an engine a head thats designed for high msv,thight gaps etc. (Like for Race Use), could this lead to more Detonation when just cruising around? Because you ride often just on the leaner needle,Piston cooling airflow tru the engine is on the lower side and so on.
I guess it would, and there could a variable Tailpipe help to lower the risk of detonation when you just cruise around.

So in my mind there is a Second Tailpipe that is open/closed via a roller/valve on part throttle openings till maybe 3/4 Throttle, where i would shut it for maximum power. And opens again when you have to close the Throttle more than the 3/4...

Does this make sense or complete nonsense?

Best Regard
Josh










Revenir en haut Aller en bas
Frits Overmars

Frits Overmars

Nombre de messages : 2302
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 40 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 40 Icon_minitimeVen 27 Mar 2020 - 13:57

Your idea of a second tailpipe makes sense. But your fear of using a combustion chamber with about 50% squish area and a tight squish gap is unfounded. On the contrary: it will promote faster burning and it will make any engine more deto-resistant.
Revenir en haut Aller en bas
josh20



Nombre de messages : 9
Localisation : Germany
Date d'inscription : 05/01/2018

[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 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 40 Icon_minitimeVen 27 Mar 2020 - 20:11

Frits Overmars a écrit:
Your idea of a second tailpipe makes sense. But your fear of using a combustion chamber with about 50% squish area and a tight squish gap is unfounded. On the contrary: it will promote faster burning and it will make any engine more deto-resistant.
Thank you Frits,
i think my fear comes from the Bikes common Nickname "Ping King"...and because it comes out of the Factory with an Squishgap/Area Combination that is kinda weird...2,5mm Gap and around 68% Area with 89x79 Bore/Stroke. The Honda Guys arent stupid i guess, so i was a little afraid.
But it was an "Agricultural" Engine, maybe its better for this kind of use and for beeing more failsafe.

I will test my new head and see what happens.
So long, thanks for your Input all over in this Forum.

Best Regards
Josh
Revenir en haut Aller en bas
Frits Overmars

Frits Overmars

Nombre de messages : 2302
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 40 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 40 Icon_minitimeVen 27 Mar 2020 - 22:57

josh20 a écrit:
Frits Overmars a écrit:
Your idea of a second tailpipe makes sense. But your fear of using a combustion chamber with about 50% squish area and a tight squish gap is unfounded. On the contrary: it will promote faster burning and it will make any engine more deto-resistant.
i think my fear comes from the Bikes common Nickname "Ping King"...and because it comes out of the Factory with an Squishgap/Area Combination that is kinda weird...2,5mm Gap and around 68% Area with 89x79 Bore/Stroke. The Honda Guys arent stupid i guess, so i was a little afraid.
I wasn't familiar with the Ping King nickname but squish dimensions of 68% area x 2,5 mm gap give a squish band volume of no less than 15,6 cc; over 1/3 of the total combustion chamber volume!
That chamber must look like a pancake wearing a bowler hat, and with the giant 2,5 mm gap you can forget about any squish at all.
Ping King indeed. I cannot for the life of me understand why Honda would build and sell something like that.
Revenir en haut Aller en bas
josh20



Nombre de messages : 9
Localisation : Germany
Date d'inscription : 05/01/2018

[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 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 40 Icon_minitimeSam 28 Mar 2020 - 7:54

Frits Overmars a écrit:

I wasn't familiar with the Ping King nickname but squish dimensions of 68% area x 2,5 mm gap give a squish band volume of no less than 15,6 cc; over 1/3 of the total combustion chamber volume!
That chamber must look like a pancake wearing a bowler hat, and with the giant 2,5 mm gap you can forget about any squish at all.
Ping King indeed. I cannot for the life of me understand why Honda would build and sell something like that.
Build and sold over almost 10 Years... scratch
You may understand now why i´m afraid. I thought about it over and over again,but didnt understand the reason. And simply thinking these guys are not very clever couldnt be true...
For Scale: Headbolts are 8mm Diameter
[Vous devez être inscrit et connecté pour voir ce lien]
[Vous devez être inscrit et connecté pour voir ce lien]
[Vous devez être inscrit et connecté pour voir ce lien]
Revenir en haut Aller en bas
carlovitch1



Nombre de messages : 347
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 40 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 40 Icon_minitimeSam 28 Mar 2020 - 9:17

Josh, if my understanding is correct this is what you obtained by molding inside the original head of your CR500 engine?
Revenir en haut Aller en bas
JanBros



Nombre de messages : 272
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 40 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 40 Icon_minitimeSam 28 Mar 2020 - 11:03

Frits, don't know if you know but your drive.google site with all your pics and info isn't working anymore.
Revenir en haut Aller en bas
Frits Overmars

Frits Overmars

Nombre de messages : 2302
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 40 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 40 Icon_minitimeSam 28 Mar 2020 - 14:43

Thanks Jan, I'll look into it.
Revenir en haut Aller en bas
josh20



Nombre de messages : 9
Localisation : Germany
Date d'inscription : 05/01/2018

[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 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 40 Icon_minitimeSam 28 Mar 2020 - 14:45

carlovitch1 a écrit:
Josh, if my understanding is correct this is what you obtained by molding inside the original head of your CR500 engine?
Yes it is. Its the Factory Head of the CR500 1992/1993-2001 with around 66ccm, nearly 20mm Squishbandwidth and 2,5mm Gap. Molded at TDC with Candlewax.
But now i prefer some kind of 2-Component Silikonkautschuk to get good negatives of transfers/heads.See below(Transfers are TZR...) [Vous devez être inscrit et connecté pour voir ce lien]
Revenir en haut Aller en bas
Contenu sponsorisé




[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5) - Page 40 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 40 Icon_minitime

Revenir en haut Aller en bas
 
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5)
Revenir en haut 
Page 40 sur 40Aller à la page : Précédent  1 ... 21 ... 38, 39, 40
 Sujets similaires
-
» WANTED TONY "Barbe-rousse"
» Traduction, help wanted
» Wanted Kader
» Bannière Wanted
» Graphiste Wanted

Permission de ce forum:Vous ne pouvez pas répondre aux sujets dans ce forum
 :: ACTUALITES :: [GP] :: [GP125 (et 250 Snif!)]-
Sauter vers: