[TR] TR4A - Tuning Update 2

[Geo Hahn]

John -

Here is a more complete version with some detail from someone who knows
much more than I:

http://www.britishcarforum.com/bcf/showthread.php?81605-Total-Advance/page2

Geo


On Sun, Dec 15, 2013 at 8:33 PM, John & Pat Donnelly <pdonnel1 at san.rr.com>wrote:

> Hi Geo,
>
> Where did this chart come from? Do you know what weights and springs were
> used on each model? Something doesn't seem correct here.
>
> Thanks!
> Johnnie
>
>
> >
> > 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_Distribu
> > tor_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?
> > >
> > > 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
>
> ** triumphs at autox.team.net **
>
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/triumphs/ahwahneetr@gmail.com