The Spares Company
Club Shop/Regalia
Parent Website
Contact Officials
Machine Registrar
Club Secretary
Membership Secretaries
MPH Editor and Forum Administrator.
Section Newsletters
Technical Databases
Photos
Home
What's new
Latest activity
Forums
New posts
What's new
New posts
Latest activity
Information
Bike Modifications
Machine Data Services
Manufacturers Manuals
Spare Parts Listings
Technical Diagrams
Whitakerpedia (Vincent Wiki)
The Club
MPH Material Archive
Flogger's Corner
Obituaries
VOC Sections
Local Sections
Local Section Newsletters
Miscellaneous
Club Assets
Club History
Club Rules
Machine Data Services
Meeting Documents
Miscellaneous
Essential Reading
Magazine/Newspaper Articles/Letters
Adverts and Sales Brochures
The Mighty Garage Videos
Bikes For Sale (Spares Company)
Log in
Register
What's new
New posts
Menu
Log in
Register
Install the app
Install
Home
Forums
Forums: Public Access
Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Additional or alternative engine breather
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="clevtrev" data-source="post: 13197" data-attributes="member: 187"><p>So John is pointing you in the right direction. Consider the operation of the pump. At 1000RPM Engine speed the pump will operate a little over one second between pulses, that means oil has to flow through an opening 5/16"dia over a short distance to fill the pump, this is the largest opening time , the faster you now go, decreases the opening time. So you think oil will fill that opening in that time ? No, the pump will cavitate, without some help. </p><p>Try a little experiment, only those with breathers other than standard need bother. Take a normal ride, say for 10 miles, drain the sump and measure, then another 10 miles with a speed not exceeding 40mph. measure amount of oil in sump. I will guarantee that the oil level will have risen. I should say put the sump oil back in before the second ride. </p><p>Discuss.</p></blockquote><p></p>
[QUOTE="clevtrev, post: 13197, member: 187"] So John is pointing you in the right direction. Consider the operation of the pump. At 1000RPM Engine speed the pump will operate a little over one second between pulses, that means oil has to flow through an opening 5/16"dia over a short distance to fill the pump, this is the largest opening time , the faster you now go, decreases the opening time. So you think oil will fill that opening in that time ? No, the pump will cavitate, without some help. Try a little experiment, only those with breathers other than standard need bother. Take a normal ride, say for 10 miles, drain the sump and measure, then another 10 miles with a speed not exceeding 40mph. measure amount of oil in sump. I will guarantee that the oil level will have risen. I should say put the sump oil back in before the second ride. Discuss. [/QUOTE]
Insert quotes…
Verification
What was Mr Irving's Christian Name?
Post reply
Home
Forums
Forums: Public Access
Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Additional or alternative engine breather
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top