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Re: [TR] 123 ignition Question

To: Randall <TR3driver@ca.rr.com>
Subject: Re: [TR] 123 ignition Question
From: Jim Henningsen <trguy75@gmail.com>
Date: Fri, 25 Mar 2016 13:23:29 -0400
Cc: triumphs@autox.team.net
Delivered-to: mharc@autox.team.net
Delivered-to: triumphs@autox.team.net
References: <61.FA.21009.2AA55F65@cdptpa-oedge01>
Thanks. The dizzy is designed for all British 6 cylinders.  I tuned it down a 
notch to 30 max advance and it is running well now.  Jim

Sent from my iPad

On Mar 25, 2016, at 11:34 AM, Randall <TR3driver@ca.rr.com> wrote:

>> Not sure what the max 
>> advance was for stock  tr6.  
> 
> According to my book, a 75 TR6 would have a Lucas 41558 dizzy, which reaches 
> a maximum advance of 18-22 degrees at 3500 rpm (at the
> crankshaft).
> 
> That may not be optimum of course, since these were smog motors to begin with 
> (late timing helps reduce NOx emissions), and the
> available fuel is a lot different now than it was 40 years ago.
> 
> Randall
> 

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