Donate NOW and support Jag-lovers!

IMPORTANT! We have moved! The new site is at www.jag-lovers.com and the new Forums can be found at forums.jag-lovers.com

Please update your links. This old site will be left up for reference, until we can move all the old content over to the new site.

Volunteers wanted! Please help us move information from these pages to the new site, and also join us in providing new, exciting content.
Serving Enthusiasts since 1993		 The Jag-lovers Web
Currently with 3,166 members



Re: [xj-s] Share the knowledge
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [xj-s] Share the knowledge

At 15:25 10/07/1998 +0100, Edwin Hyatt wrote:
>It seems the cent advance handle the advance curve from a little over
>idle to red line. What the heck does the vac advance do? Seems to be
>duplicating the cent advance.

The centrifugal advance operates strictly according to RPM; the vacuum
advance operates according to throttle position. Throttle open = less
vacuum, throttle closed = more vacuum. Yes, the vacuum for a given throttle
position varies somewhat according to RPM, but the difference is less than
you'd think. Basically, the idea with the vacuum advance is to advance the
timing at small throttle opening for complete burning, retard it at large
throttle openings to prevent detonation ("pinging").

- Jan


The Gum Tree Garage, where oil and beer mix just fine...
References:

 

Please help support the move to the new site, and DONATE what you can.
A big Thank You to those who have donated already!

 

       
       
       
       
Go to our Homepage
Improve your Jag-lovers experience with the Mozilla FireFox Browser!

  View the latest posts from our Forums via an RSS Feed!

©Jag-loversTM Ltd / JagWEBTM 1993 - 2024
All rights reserved. Jag-lovers is supported by JagWEBTM
For Terms of Use and General Rules see our Disclaimer
Use of the Jag-lovers logo or trademark name on sites other than Jag-lovers itself in a manner implying endorsement of commercial activities whatsoever is prohibited. Sections of this Web Site may publish members and visitors comments, opinion and photographs/images - Jag-lovers Ltd does not assume or have any responsibility or any liability for members comments or opinions, nor does it claim ownership or copyright of any material that belongs to the original poster including images. The word 'Jaguar' and the leaping cat device, whether used separately or in combination, are registered trademarks and are the property of Jaguar Cars, England. Some images may also be © Jaguar Cars. Mirroring or downloading of this site or the publication of material or any extracts therefrom in original or altered form from these pages onto other sites (including reproduction by any other Jaguar enthusiast sites) without express permission violates Jag-lovers Ltd copyright and is prohibited
Go to our Homepage
Your Browser is: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com), IP Address logged as 18.223.209.98 on 19th May 2024 15:29:22