[DML] Re: Dwell meter setting?? More than you might want to know... ? too LONG?

["David Teitelbaum" <jtrealty@xxxxxxxxxxxxx>]

Or you can do like many would and just find the scale that gives you
the readings you are looking for! Of course having a depth of
knowledge gives you the understanding of what you are REALLY  doing.
Hopefullly the people on the DML are all the better for getting a full
explanation  of this procedure. It is realively arcane and most
mechanics wouldn't even know the theory behind it. In fact many today
wouldn't be able to set points with a feeler gauge OR a dwell meter! 
The dwell meter will get you close enough to pass emissions in just
about any State in the country if you are patient. A tiny adjustment
on the mixture screw (or ANY vacuum leak) can have a large effect. The
Workshop Manual gives you the steady-state readings you should see,
get them (in "open loop") and then in "closed loop" you can set the
mixture. "Closed Loop" is where the O2 sensor is running the mixture
and changing it in response to the Oxygen level in the exhaust. My
thanks to DD for a very good and relatively simple explanation of a
difficult topic.
David Teitelbaum
vin 10757




--- In dmcnews@xxxxxxxxxxxxxxx, doctorDHD@... wrote:
>
>  
>  
> Guys, 
>  
> The  "dwell meter" was originally designed to measure the time, in 
degrees 
> that the "points" of the ignition system stayed (dwelled) closed.  
That is 
> dependant on how many cylinders the engine has.  If it was a 4 
cylinder engine 
> the maximum dwell would be 360 degrees divided by 4 (cylinders) 
which is 90 
> degrees, meaning that if the points were closed all the time (ie. 
100 percent 
> of the time) they would be closed for 90 degrees for each  cylinder.
 Thus for 
> a six cylinder car the maximum would be 360 divided by  6  = 60
degrees and 
>







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