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
Ring Orientation
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="Elanman39" data-source="post: 173198" data-attributes="member: 5453"><p>I worked at Lotus Cars for many years and at one time I was involved in a series of dynamometer tests run to determine if there was any basis to the various recommendations made for ring gap positions as the production line were fed up with various experts telling them they were doing it wrong.... We performed an extensive series of detailed tests and could find no measurable effect of different ring alignments on blow-by flow rates or oil consumption. We did prove that the rings rotate, but not all at the same rate or even direction on any one piston, so any alignment achieved on build was soon lost unless the rings were staked as on a 2 stroke. Ring gaps were found to be critical, the tighter the better as long as they were not so tight that they closed up due to differential expansion of piston and bore and made the ring scuff. As with all things the law of diminishing returns applied and we found that any gap of less than 0.002" per inch of bore diameter offered an insignificant benefit on a water cooled engine with Nikasil coated aluminium wet liners.</p><p>!! edited to add a 0 to the hopelessly wrong ring gap figure @!!</p></blockquote><p></p>
[QUOTE="Elanman39, post: 173198, member: 5453"] I worked at Lotus Cars for many years and at one time I was involved in a series of dynamometer tests run to determine if there was any basis to the various recommendations made for ring gap positions as the production line were fed up with various experts telling them they were doing it wrong.... We performed an extensive series of detailed tests and could find no measurable effect of different ring alignments on blow-by flow rates or oil consumption. We did prove that the rings rotate, but not all at the same rate or even direction on any one piston, so any alignment achieved on build was soon lost unless the rings were staked as on a 2 stroke. Ring gaps were found to be critical, the tighter the better as long as they were not so tight that they closed up due to differential expansion of piston and bore and made the ring scuff. As with all things the law of diminishing returns applied and we found that any gap of less than 0.002" per inch of bore diameter offered an insignificant benefit on a water cooled engine with Nikasil coated aluminium wet liners. !! edited to add a 0 to the hopelessly wrong ring gap figure @!! [/QUOTE]
Insert quotes…
Verification
The Series 'A' Rapide was known as the '********' Nightmare?
Post reply
Home
Forums
Forums: Public Access
Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Ring Orientation
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