[TR] distributor advance

DAVID MASSEY dave1massey at cs.com
Mon Mar 2 18:34:00 MST 2020

 Two things determine how a spring behaves; the spring rate and the free length.  When swapping in a longer and stiffer spring will give you more movement initially and less change as the speed increases.
So, yes, a longer spring will give you more initial advance at idle but max advance would be achieved at a higher speed.
But the answer is: It depends.  How do the two springs compare in both length and spring rate.

-----Original Message-----
From: David P <frogeye at porterscustom.com>
To: triumphs <triumphs at autox.team.net>
Sent: Mon, Mar 2, 2020 4:11 pm
Subject: Re: [TR] distributor advance

 ah, wouldn't the longer spring cause the weights to be moved outward...giving too much initial...
  On 3/2/2020 2:06 PM, Randall wrote:
 Actually there is a reasonable explanation.
 The heavier springs are also longer than the old ones, so the tension as installed is lower.
 -- Randall
 On 2 March 2020 14:45:07 GMT-06:00, Paul Tegler <ptegler at verizon.net> wrote: 
 Having studied this over and over again, even have gone as far as redesigning the whole timing system (during a F.I and full wasted spark conversion)� ... and with simple physics behind me I can comfortably say your empirical data has to be flawed....no nice way to say it. simple physics.... a tighter (stronger) spring will not extend as far as a lighter spring under the same weight applied. 
  Either you jostled something in the initial setup/study, or your post spring work setup shifted something, throwing one of the two data sets out as a valid data reference. Either way,,,,this is possibly a mute point if it is now all working for you as expected.� :-) ptegler
  On 3/2/2020 2:15 PM, Peter Arakelian wrote:

#yiv9183878647 #yiv9183878647 -- _filtered {} _filtered {} #yiv9183878647 #yiv9183878647 p.yiv9183878647MsoNormal, #yiv9183878647 li.yiv9183878647MsoNormal, #yiv9183878647 div.yiv9183878647MsoNormal {margin:0in;margin-bottom:.0001pt;font-size:11.0pt;font-family:sans-serif;} #yiv9183878647 a:link, #yiv9183878647 span.yiv9183878647MsoHyperlink {color:blue;text-decoration:underline;} #yiv9183878647 MsoChpDefault {} _filtered {} #yiv9183878647 div.yiv9183878647WordSection1 {} #yiv9183878647  >> A stiffer spring would have not allowed the weights to swing out as far 
 at lower rpms. It would NOT ADD idle advance over the original 
 settings.<<  � I admit that I believed the stronger springs would reduce centripetal advance at idle .� But the empirical evidence shows otherwise.� When I put the  stiffer springs in the timing at idle ADVANCED 10-15 degrees.� It is very stable.   � Sent from  Mail for Windows 10  �  -- 
Paul Tegler
ptegler at verizon.net  www.teglerizer.com 
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