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
Modern Fuel & Ignition Advance
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="greg brillus" data-source="post: 94943" data-attributes="member: 597"><p>One point that no one has mentioned on here is the effect of modern fuel and ignition timing on other makes of British bikes...........Or certainly any old bike with hemispherical combustion chambers, cars included. The facts are that most all need their overall advance reduced by around 4 to 5 degrees. With an ATD the range it operates over changes little apart from normal ware. Reducing the timing at full advance will result in the retarded position being at or after TDC. This is why the fixed stops need to be modified to reduce the operating range of the ATD to a travel of 15 degrees. So a retarded engine with 4 to 5 degrees BTDC plus 30 degrees in the ATD will give you 34 to 35 degrees full advance. Most road going Vincent's set up this way even with 8:1 pistons and Mk 2 cams will be fine.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 94943, member: 597"] One point that no one has mentioned on here is the effect of modern fuel and ignition timing on other makes of British bikes...........Or certainly any old bike with hemispherical combustion chambers, cars included. The facts are that most all need their overall advance reduced by around 4 to 5 degrees. With an ATD the range it operates over changes little apart from normal ware. Reducing the timing at full advance will result in the retarded position being at or after TDC. This is why the fixed stops need to be modified to reduce the operating range of the ATD to a travel of 15 degrees. So a retarded engine with 4 to 5 degrees BTDC plus 30 degrees in the ATD will give you 34 to 35 degrees full advance. Most road going Vincent's set up this way even with 8:1 pistons and Mk 2 cams will be fine. [/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
Modern Fuel & Ignition Advance
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