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I did read somewhere how to work out dwell by the contact gap. For every 0.10mm of gap the dwell angle moves xº depending on which way the gap moves. The basic principle is to increase dwell, reduce contact gap and increase contact gap reduces dwell.
I do know 0.50mm gives 52º so with what rocket has shown, my guess is if the contact gap is 0.35~0.40mm dwell will be somewhere around 54~58º between idle and 2000rpm.
I think the most important thing with dwell is how much variation between idle and 2000rpm rather than exact figures. Variations show either worn dizzy cam, excessive side play in the shaft or crook contact set. If the contacts are set correctly your dwell will be shown with it idling and will stay fairly uniform up to 2000rpm. If not the further inspection is required.
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Thanks for the info. The dwell is about 62 degrees on my engine so maybe the points are a bit to close. But the engine sounds like it is running well so will leave things for the moment.
Anthony
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found on a forum faq in england somewhere...
Q. What is my Series Land Rover distributor’s dwell angle?
A. 60 degrees + or – 2 degrees
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Hi Anthony
When you run the LPG,you can advance the timing more without pinging as the LPG has a better rating than the old super RON,with the LPG you should go the next heat rating DOWN (ie cooler) than standard as LPG burns hotter.
Cant give you the exact increase in advance over standard on my 202 as it appears to have a mismatched timing cover/harmonic balancer.
Once you work out where your landy runs best on LPG mark the dizzy against the block,and also a mark for where petrol works best.It is then just a matter of a quick adjustment to suit the fuel you are running.
Premium ULP should work out the same or better value as you should use less than ulp per km,unless you really get stuck in with your right foot with all that extra power!!!!
Andrew
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You mean points are too far open..... [img]style_emoticons/<#EMO_DIR#>/biggrin.gif[/img]
