AccueilGalerieRechercherDernières imagesS'enregistrerConnexionNouveaux messages depuis dernière visite
Rechercher
 
 

Résultats par :
 
Rechercher Recherche avancée
Qui est en ligne ?
Il y a en tout 104 utilisateurs en ligne :: 8 Enregistrés, 0 Invisible et 96 Invités :: 2 Moteurs de recherche

Alain Gwada, Aragon, bartau, bgallot, jeannin, michel guichard, Phil37, spyderman 32

Le record du nombre d'utilisateurs en ligne est de 539 le Mar 19 Mar 2024 - 11:10
Derniers sujets
»  [MotoGP] Infos , nouveautés , potins , tests et plus pour la saison GP 2025 ...
Squish Volume Icon_minitimeAujourd'hui à 10:21 par Mykeul

» [Bla bla bla] ePower : Y va-t-on vraiment ? N° 2 .
Squish Volume Icon_minitimeAujourd'hui à 10:12 par Dialmax

» [Oldies] Kesako et quelle année?
Squish Volume Icon_minitimeAujourd'hui à 8:12 par Dan42

» [Oldies] Bourg en Bresse 1973
Squish Volume Icon_minitimeAujourd'hui à 8:04 par APPIETTO Marc

» [Oldies] Quizz (29)
Squish Volume Icon_minitimeHier à 22:30 par panerai

» Martin de course???
Squish Volume Icon_minitimeHier à 21:28 par corki2

» [Oldies] Michel ROUGERIE, 30 ans déjà !
Squish Volume Icon_minitimeHier à 20:16 par corki2

» [oldies] Honda 125 CB93 1963-1966 /racing kit.
Squish Volume Icon_minitimeHier à 18:42 par Adco

» [Oldies] Questions (vitesse 1947-1976)
Squish Volume Icon_minitimeHier à 17:58 par berlu

» BMW : 100 ans de championnats, 70 ans de BMW RS et autres anniversaires
Squish Volume Icon_minitimeHier à 17:31 par Lothar M.

» André Luc Appietto
Squish Volume Icon_minitimeHier à 15:00 par momodedale

» [Oldies] Renzo Pasolini, photos insolites
Squish Volume Icon_minitimeHier à 7:29 par Ala Zorro

»  [GP] GP du Portugal 2024 sur le circuit de Portimao les 22- 23 et 24 lMars 2024
Squish Volume Icon_minitimeMar 26 Mar 2024 - 18:17 par doum

»  [WSBK] Espagne , Catalunya 2024 , les 22 , 23 et 24 Mars 2024 .
Squish Volume Icon_minitimeMar 26 Mar 2024 - 17:19 par Charly

» [Oldies] Moto Elf
Squish Volume Icon_minitimeMar 26 Mar 2024 - 16:04 par bubu

» controle technique moto
Squish Volume Icon_minitimeMar 26 Mar 2024 - 9:38 par Charly

» [Endurance] Saison 2024 .
Squish Volume Icon_minitimeLun 25 Mar 2024 - 16:48 par crigar

»  [SORTIES] Sunday Ride Classic 2024 .
Squish Volume Icon_minitimeDim 24 Mar 2024 - 9:40 par yves kerlo

» Construction d’une moto électrique, base moto 3
Squish Volume Icon_minitimeSam 23 Mar 2024 - 18:13 par Ed

» [Technique] Vous avez dit "Distribution"?
Squish Volume Icon_minitimeSam 23 Mar 2024 - 8:32 par panerai

» [Technique] Rayonnage...
Squish Volume Icon_minitimeVen 22 Mar 2024 - 18:55 par Joel Enndewell 2424

» [Oldies] Angel Nieto Mike Hailwood (part 6)
Squish Volume Icon_minitimeVen 22 Mar 2024 - 8:39 par Dan42

» [Oldies] Fergus, Geoff, Libero et les autres (vitesse 1946-1960)
Squish Volume Icon_minitimeMer 20 Mar 2024 - 12:47 par Charly

» [Oldies] Restauration de mon side-car des années 70, la suite!
Squish Volume Icon_minitimeMar 19 Mar 2024 - 17:26 par Joel Enndewell 2424

»  [MotoGP] GP 2024 du Qatar à Losail les 8 - 9 et 10 Mars 2024
Squish Volume Icon_minitimeLun 18 Mar 2024 - 19:10 par damelydie

» [Oldies] Jack Findlay, pilote de légende
Squish Volume Icon_minitimeDim 17 Mar 2024 - 23:45 par jack177071

» [Oldies] Gérald Motos
Squish Volume Icon_minitimeDim 17 Mar 2024 - 10:45 par collecto

» GP Canada Mosport 29 & 30 septembre 1967
Squish Volume Icon_minitimeDim 17 Mar 2024 - 8:13 par Adco

» [Technique] Bielle de Formule 1 tout à fait passionnante
Squish Volume Icon_minitimeDim 17 Mar 2024 - 8:13 par Dan42

» Demande d'aide pour moteur 3 cylindres
Squish Volume Icon_minitimeSam 16 Mar 2024 - 16:20 par Joel Enndewell 2424

Mots-clés
motobecane suzuki ducati aprilia 1973 moto bourg coupe 2013 rouge side motos francaises wanted ROAD charade classic yamaha Mans RACING zone bresse artisanales 1976 oldies inventaire
Meilleurs posteurs
Marc
Squish Volume Voting16Squish Volume Voting13Squish Volume Voting15 
EDOUARD Jean
Squish Volume Voting16Squish Volume Voting13Squish Volume Voting15 
philwood
Squish Volume Voting16Squish Volume Voting13Squish Volume Voting15 
Pierre"PhilRead"
Squish Volume Voting16Squish Volume Voting13Squish Volume Voting15 
mickey
Squish Volume Voting16Squish Volume Voting13Squish Volume Voting15 
yves kerlo
Squish Volume Voting16Squish Volume Voting13Squish Volume Voting15 
bubu
Squish Volume Voting16Squish Volume Voting13Squish Volume Voting15 
Fügner
Squish Volume Voting16Squish Volume Voting13Squish Volume Voting15 
Dialmax
Squish Volume Voting16Squish Volume Voting13Squish Volume Voting15 
Jarno
Squish Volume Voting16Squish Volume Voting13Squish Volume Voting15 
La réclame...
Le Deal du moment : -50%
-50% sur les sacs à dos pour ordinateur ...
Voir le deal
19.99 €

 

 Squish Volume

Aller en bas 
3 participants
AuteurMessage
South_Oz




Nombre de messages : 2
Localisation : australia
Date d'inscription : 07/07/2013

Squish Volume Empty
MessageSujet: Squish Volume   Squish Volume Icon_minitimeSam 12 Mar 2016 - 1:49

I am wondering if squish volume should be taken into account when calculating head volume?

My thinking is that in theory there should be zero clearance between the piston and head in the squish area at full revs. Squish volume is around 2cc with 0.8 squish clearance. So a head with 10.5cc with plug in is really 8.5cc with engine up to operating temp at peak RPM?

All measurement taken with a 56mm bore.

Thanx

Dave
Revenir en haut Aller en bas
Frits Overmars

Frits Overmars


Nombre de messages : 2611
Age : 75
Localisation : Raalte, Holland
Date d'inscription : 12/10/2010

Squish Volume Empty
MessageSujet: Re: Squish Volume   Squish Volume Icon_minitimeSam 12 Mar 2016 - 7:10

Good question Dave. Experience teaches us that we need a minimum squish gap of about 1% of the stroke; that is the amount the piston comes nearer the head at high revs. Of course it depends on the revs themselves, on the stiffness of the crankshaft and on the type of crankshaft bearing, but the 1% is a good average value.
Therefore I subtract a volume corresponding to 1% of the stroke from the static combustion volume when calculation the compression ratio in my engine simulation program.

Now how about a little introduction? Who are you, what are your hobbies, etc?
Revenir en haut Aller en bas
South_Oz




Nombre de messages : 2
Localisation : australia
Date d'inscription : 07/07/2013

Squish Volume Empty
MessageSujet: Re: Squish Volume   Squish Volume Icon_minitimeSam 12 Mar 2016 - 8:34

Hi Frits, thanx for your response. I race a Suzuki RGV 250 at Lake Gairdner in South Australia. So far my best speed has been 140 MPH (225 KPH) average over a flying mile on 98 octane gasoline.

The last 2 years I have changed to the Fuel class and have run Methanol with limited success. Im going to change to E85 for next year. The reason for my question is that im trying to design some heads to run E85 on. I used some modified RGV SP heads to run the Methanol but the compression was too much so it wouldnt rev as much as I would have liked. I used some heads that Lozza designed for me to run on gasoline, they worked fine but I have reached the maximum output of those as they are distorting and the O ring shows signs of blowing out. I like to do as much as I can, as cheaply as I can so want to modify the heads that I used for Methanol to run on E85.
A friend has a set of Jolly Moto pipes and was good enough to measure them for me so I put the measurements into MOTA and made a few adjustments to them so they give a bit better top at the expense of mid range and made a set for myself.
Im going to work on the aerodynamics of the bike as well for next year, my goal is 150 MPH (250KPH)

Thanx again Dave

[Vous devez être inscrit et connecté pour voir cette image]
Revenir en haut Aller en bas
2T4T




Nombre de messages : 5
Localisation : Essonne
Date d'inscription : 17/01/2010

Squish Volume Empty
MessageSujet: Re: Squish Volume   Squish Volume Icon_minitimeDim 13 Mar 2016 - 21:49

Hello ,

Very good question South_Oz.

Can we assume that squish height drop by square of engine rev due to inertial forces ?
If piston "hit" head at 14500rpm , could we say that squish height is around 1% - (13000/14500)^2 = 0.2% ?
This could conduct to a 0.15 - 0.2mm squish gap for a RSA and a twice the "static" MSV calc @ 13000rpm ?

Does a so high MSV may help ?

Thanks and regards
Alain
Revenir en haut Aller en bas
Contenu sponsorisé





Squish Volume Empty
MessageSujet: Re: Squish Volume   Squish Volume Icon_minitime

Revenir en haut Aller en bas
 
Squish Volume
Revenir en haut 
Page 1 sur 1
 Sujets similaires
-
» [Technique] Aide au squich ?
» [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 5)

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