[TR] TR4A - Tuning Update 2

[Geo Hahn]

I think the most important number is the advance when everything is 'all
in', i.e. at high RPM.

http://i1214.photobucket.com/albums/cc499/Ahwahnee18/TR4/Lucas_Distributor_Advance_Curves_zps03074f01.gif

Any retarding you do at idle will, irrespective of how smoothly it runs
there, rob you of power at speed.

Geo


On Sun, Dec 15, 2013 at 4:47 PM, Jerry Van Vlack <jerryvv at roadrunner.com>wrote:

> It will run smoother but will it have any power @ 4 degrees after TDC?
>
> -----Original Message----- From: G.D. Huggins
> Sent: Sunday, December 15, 2013 5:22 PM
> To: Geo Hahn
> Cc: Triumphs
> Subject: Re: [TR] TR4A - Tuning Update 2
>
>
> Nice catch!!
>
> That should be "ATDC"..
>
>
> On Dec 15, 2013, at 4:12 PM, Geo Hahn wrote:
>
>  On Sun, Dec 15, 2013 at 3:03 PM, G.D. Huggins <guy at genfiniti.com> wrote:
>>
>> ... I statically timed the engine, then retarded to 4 degrees BTC, and the
>>
> engine
>
>> runs smoother than ever!...
>>
>>
>> 40 BTDC is advancing the timing, not retarding.  And yes, advancing helps
>> so
>>
> long as you stop short of pinging.
>
>>
>> Geo