AccueilCalendrierGalerieFAQRechercherS'enregistrerConnexionNouveaux messages depuis dernière visite
Rechercher
 
 

Résultats par :
 
Rechercher Recherche avancée
Qui est en ligne ?
Il y a en tout 34 utilisateurs en ligne :: 16 Enregistrés, 0 Invisible et 18 Invités :: 2 Moteurs de recherche

aynie, biger, camathias, Clubman, coupekawa, EDOUARD Jean, enndewell joel, Jan Thiel, JH42, mandrax, Pef, quadneufdoc91, RAW, Team TZ, terama, V888

Le record du nombre d'utilisateurs en ligne est de 187 le Lun 3 Déc 2012 - 14:45
Derniers sujets
» [MotoGP] GP 2019 de Catalogne à Barcelone , les 14 , 15 et 16 Juin 2019
domes head Icon_minitimeAujourd'hui à 8:59 par enndewell joel

» [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5)
domes head Icon_minitimeAujourd'hui à 8:52 par Jan Thiel

» [Oldies] Helmut Fath
domes head Icon_minitimeAujourd'hui à 8:35 par vintagescope

» [Oldies] Quizz??????
domes head Icon_minitimeHier à 23:30 par Pierre"PhilRead"

» [Oldies] Circuit de Lyon 1946 et 1947
domes head Icon_minitimeHier à 23:21 par dzier

» [Oldies] C'était le bon temps...
domes head Icon_minitimeHier à 21:29 par Pierre"PhilRead"

» [Oldies] Les transporteurs de motos des paddocks
domes head Icon_minitimeHier à 20:57 par MacPepR

» [Moto2] KTM
domes head Icon_minitimeHier à 18:53 par enndewell joel

» [Oldies] Parlons Paton!
domes head Icon_minitimeHier à 17:48 par philwood

» [Oldies] Renzo Pasolini, photos insolites
domes head Icon_minitimeHier à 17:46 par philwood

» [Oldies] Lino Tonti
domes head Icon_minitimeHier à 17:25 par philwood

» [Road Racing] 500 KX RR mais à l'eau
domes head Icon_minitimeHier à 16:20 par rudgissimo

» [Technique] La JBB-Metiss de A à Z...
domes head Icon_minitimeHier à 15:20 par sdvs

» Montée historique du Salbert.
domes head Icon_minitimeHier à 11:05 par enndewell joel

» [GP] Johann Zarco
domes head Icon_minitimeVen 14 Juin 2019 - 20:26 par EDOUARD Jean

» [Oldies] Angel Nieto Mike Hailwood ( Part5 )
domes head Icon_minitimeVen 14 Juin 2019 - 19:08 par bubu

» [MotoGP] Jorge Lorenzo, pilote de course? Non, violoniste!
domes head Icon_minitimeVen 14 Juin 2019 - 18:47 par dbu

» [Oldies] Ils ont p'loté la belle à culbuter de Varese (2ème partie)
domes head Icon_minitimeVen 14 Juin 2019 - 18:39 par Pierre"PhilRead"

» [SORTIES] Moto-Légende 1&2 juin circuit de Dijon-Prenois
domes head Icon_minitimeVen 14 Juin 2019 - 14:02 par alain combemale

» LUDWIG APFELBECK (1903-1987) le spécialiste Autrichien des culasses
domes head Icon_minitimeVen 14 Juin 2019 - 12:46 par bialbero

» [Oldies] 50cc de vitesse : Toute leur histoire ! (partie 2)
domes head Icon_minitimeVen 14 Juin 2019 - 11:41 par spreyer

» [Oldies] Les Aermacchi deux temps
domes head Icon_minitimeVen 14 Juin 2019 - 10:28 par Ala Zorro

» [Oldies] 750 TZ Daytona 1979
domes head Icon_minitimeVen 14 Juin 2019 - 9:58 par justin

» [Oldies] Side-Car: quelques images
domes head Icon_minitimeVen 14 Juin 2019 - 9:52 par Srx56

» [Oldies] 200 Miglia Imola Revival
domes head Icon_minitimeVen 14 Juin 2019 - 6:53 par singleton560

» [Oldies] Jarno Saarinen, la star qui a révolutionné le pilotage... (Part 3)
domes head Icon_minitimeJeu 13 Juin 2019 - 21:32 par coupekawa

» [Oldies] Motocistes d'époque
domes head Icon_minitimeJeu 13 Juin 2019 - 19:20 par philwood

» [WSBK] Jerez 2019
domes head Icon_minitimeJeu 13 Juin 2019 - 16:32 par Charly

» [Endurance] saison 2018/2019
domes head Icon_minitimeMer 12 Juin 2019 - 21:34 par marcolemotard

» [Oldies] Des livres sur la course moto
domes head Icon_minitimeMer 12 Juin 2019 - 12:06 par Srx56

La réclame...
Mots-clés
metiss charade daytona ducati 2013 zone coupe aprilia suzuki france wanted classic side yamaha moto 2018 1973 aermacchi RACING fourche geco ROAD triumph rouge eurosport motobecane
Meilleurs posteurs
Marc
domes head Voting16domes head Voting13domes head Voting15 
philwood
domes head Voting16domes head Voting13domes head Voting15 
mickey
domes head Voting16domes head Voting13domes head Voting15 
Pierre"PhilRead"
domes head Voting16domes head Voting13domes head Voting15 
EDOUARD Jean
domes head Voting16domes head Voting13domes head Voting15 
Jarno
domes head Voting16domes head Voting13domes head Voting15 
Fügner
domes head Voting16domes head Voting13domes head Voting15 
yves kerlo
domes head Voting16domes head Voting13domes head Voting15 
janpol84
domes head Voting16domes head Voting13domes head Voting15 
Dialmax
domes head Voting16domes head Voting13domes head Voting15 
La réclame...

Partagez
 

 domes head

Aller en bas 
AuteurMessage
pagi



Nombre de messages : 25
Localisation : montpellier
Date d'inscription : 10/02/2014

domes head Empty
MessageSujet: domes head   domes head Icon_minitimeJeu 20 Oct 2016 - 20:44

Mr Overmars
since i saw your toroidal shape for the combustion chamber, im going to make one for my engine(jetski)
it s a 2 stroke  ( off course),twin cylinder, 82x74 (bore/stoke)780cc,390cc per cylinder,max power at 7350 rpm...
do you think it s could be a good idea or not..?could this shape work well with a engine have not hight rpm?
(for now I can not download a pdf files, i m going to see if i can convert this pdf files) i have a drawing, but it s not complete

thank you
Revenir en haut Aller en bas
Frits Overmars

Frits Overmars

Nombre de messages : 2187
Age : 70
Localisation : Raalte, Holland
Date d'inscription : 12/10/2010

domes head Empty
MessageSujet: Re: domes head   domes head Icon_minitimeJeu 20 Oct 2016 - 21:33

pagi a écrit:
Mr Overmars since i saw your toroidal shape for the combustion chamber, im going to make one for my engine(jetski). it s a 2 stroke  ( off course),twin cylinder, 82x74 (bore/stoke)780cc,390cc per cylinder,max power at 7350 rpm... do you think it s could be a good idea or not..?could this shape work well with a engine have not hight rpm? (for now I can not download a pdf files, i m going to see if i can convert this pdf files) i have a drawing, but it s not complete.
I think that the toroidal shape can work well for your engine, Pagi. It does not specifically need a high rpm.
Revenir en haut Aller en bas
pagi



Nombre de messages : 25
Localisation : montpellier
Date d'inscription : 10/02/2014

domes head Empty
MessageSujet: Re: domes head   domes head Icon_minitimeJeu 20 Oct 2016 - 22:42

domes head 809262 well,next week i m going to put some drawing with my original shape and what i want to go.
the domes (x2) i have to machine, need more capacity,they are too small (24.9cc) and i need around 30cc with 1.09 squish gap to have a little bit less compression ratio( i have before with 27.3cc and 1.45 squish gap on my engine,but i want to keep this domes(27.3cc) like this for a another engine))
1.45mm-0.365=1.085mm by a new base gasket (the rules in my class does not allow to machine the top off the cylinder) that s give around 2cc i have to put in the chamber so 27.2+2cc=29.2 and i want 30cc for my new compression ratio,but this domes(like the 27.2cc) have squish band with 56-57 per cent area...!!! i find that a little bit too much isn t it??????
i specify, my ignition have variable timming (26°max at 4000 rpm) , then the advance decreases

sorry for my bad english !!!

best regards
Revenir en haut Aller en bas
Frits Overmars

Frits Overmars

Nombre de messages : 2187
Age : 70
Localisation : Raalte, Holland
Date d'inscription : 12/10/2010

domes head Empty
MessageSujet: Re: domes head   domes head Icon_minitimeVen 21 Oct 2016 - 10:11

Your english is fine, Pagi, much better than my french.
56-57 % squish area is much but not necessarily too much. 1,45 mm squish gap is definitely too much. You still haven't mentioned your desired compression ratio. But never mind, I'd like to make it clear that I do not intend to perform individual calculations here.
Revenir en haut Aller en bas
pagi



Nombre de messages : 25
Localisation : montpellier
Date d'inscription : 10/02/2014

domes head Empty
MessageSujet: Re: domes head   domes head Icon_minitimeVen 21 Oct 2016 - 13:18

i have dont measure exactly my compression ratio , i m going to make that this week end
if i could keep my squish band like this or a little less wide that help me for my new shape....
i have make a thirst design, but it s make too much cc... i need to add 4.6cc and the result it s 8.70cc

here my original shape [Vous devez être inscrit et connecté pour voir ce lien]
the width of the squish band is not correct, it s a error, it s make 15mm
another (the same domes[Vous devez être inscrit et connecté pour voir ce lien]

and my first dome change [Vous devez être inscrit et connecté pour voir ce lien]
[Vous devez être inscrit et connecté pour voir ce lien]

and the result off my dome change[Vous devez être inscrit et connecté pour voir ce lien]
on the result, theres not the squish band, only the change area

next week , i m going too put another drawing

for my new capacity, i include that i m going to machine the "intrusion or bump" (around 0.423cc), to make a true offset (i have question about this!!!) is there a rule off thumb, or the result off the external radius, total volume ?
Revenir en haut Aller en bas
pagi



Nombre de messages : 25
Localisation : montpellier
Date d'inscription : 10/02/2014

domes head Empty
MessageSujet: compression ratio   domes head Icon_minitimeLun 24 Oct 2016 - 20:11

well, my compression ratio is 13.62/1......do you think it s too hight or could work? i have very little detonation on a dome , could be due to the squish gap too tall like i think ?if you think it could work, i keep this ratio for my new domes.....
have you a rules of thumb to define the width of the offset or does it s the result off the outside radius, chamber volume ?
Revenir en haut Aller en bas
Frits Overmars

Frits Overmars

Nombre de messages : 2187
Age : 70
Localisation : Raalte, Holland
Date d'inscription : 12/10/2010

domes head Empty
MessageSujet: Re: domes head   domes head Icon_minitimeLun 24 Oct 2016 - 22:56

pagi a écrit:
well, my compression ratio is 13.62/1......do you think it s too hight or could work?  i have very little detonation on a dome , could be due to the squish gap too tall like i think ?if you think it could work, i keep this ratio for my new domes.....
have you a rules of thumb to define the width of the offset or does it s the result off the outside radius, chamber volume ?
Pagi, I know nothing about your engine, how much power it makes, not even if it's aircooled or watercooled, so how should I know what compression ratio it will tolerate?
I have no rule of thumb for the offset; it will have to be calculated. But like I wrote in my previous post, I do not intend to perform individual calculations here.
Revenir en haut Aller en bas
pagi



Nombre de messages : 25
Localisation : montpellier
Date d'inscription : 10/02/2014

domes head Empty
MessageSujet: Re: domes head   domes head Icon_minitimeLun 24 Oct 2016 - 23:37

my engine is near 105cv (my engine is not run on a dyno), this is an estimate with the manufacturer data exhaust , is watercooled..

do you see something wrong on my drawing ? (domes change)
Revenir en haut Aller en bas
Contenu sponsorisé




domes head Empty
MessageSujet: Re: domes head   domes head Icon_minitime

Revenir en haut Aller en bas
 
domes head
Revenir en haut 
Page 1 sur 1
 Sujets similaires
-
» Quel domes pour culasse cool head ?
» head shaking, c''est quoi ça???????
» raquette de tennis head metallix airflow
» Free Domes Kite
» Arrow Head de Cargèse 2011

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