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Post Info TOPIC: Dwell on 194 0r 250 6 cyl


Uber Guru

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Dwell on 194 0r 250 6 cyl


Does anyone know what the dwell should be on a 250 6 cyl ?

I am not to sure what Dwell actually is ?

Is it the difference between the timing with the advance dissconnected and when it is connected ?



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Surrey BC

1963 Acadian Beaumont Sport Deluxe
http://www.63acadian.com/



Poncho Master!

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Lefty wrote:

Does anyone know what the dwell should be on a 250 6 cyl ?

I am not to sure what Dwell actually is ?

Is it the difference between the timing with the advance dissconnected and when it is connected ?


Dwell is the time the ignition points are closed measured in degrees. The point gap on the Chevy 6 is .019". This can be confirmed with a dwell meter, if the dwell is between 31-34 degrees, the point gap will be .019 on average. Point gap can affect ignition timing so dwell should be set before timing. When checking/adjusting ignition timing you want the vacuum advance disconnected to make sure the base timing is not affected by vacuum, and the engine idling low so the mechanical advance is inactive. The internal mechanical advance will advance ignition timing as engine speed increases and can be checked/measured with a timing light. The vacuum advance is a fuel economy function and advances ignition timing independantly of the mechanical advance. Under high load/low vacuum conditions such as accelerating, the vacuum advance tends to be inactive. Under low load/high vacuum conditions such as cruising, the vacuum advance tends to be highly active. Vacuum gauges were often refered to as economy gauges.

 

Thanks

Randy

 



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Sherwood Park
Alberta, Canada

 



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thanks, i changed my points to an electronic system and then did the timing with a new timig light but cannot find a dwell meter to check.



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Surrey BC

1963 Acadian Beaumont Sport Deluxe
http://www.63acadian.com/



Poncho Master!

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Posts: 1824
Date:

Lefty wrote:

thanks, i changed my points to an electronic system and then did the timing with a new timig light but cannot find a dwell meter to check.


 Nothing to check, you don't have points any more as you went to electronic ignition.

 



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Sherwood Park
Alberta, Canada

 



Uber Guru

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Cool, then im all set.
Seems to run much smoother now.
just need a sunny day to take it for a ride..


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Surrey BC

1963 Acadian Beaumont Sport Deluxe
http://www.63acadian.com/

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