Re: [T3] AB dizzy timing

[Greg Merritt <gregm@vwtype3.org>]

<x-flowed>At 9:49 PM -0500 4/20/03, Jim Adney wrote:
> On 20 Apr 2003 at 18:37, Greg Merritt wrote:
>
> >   Not really putting 2 and 2 together, I decided to have a look
> >  at the timing statically after I'd set it dynamically.  I found I'd
> >  timed it to maybe a degree or two before tdc when measured
> >  statically.  Then, of course, I realized that it's supposed to give
> >  30degrees max advance at the crank... and if I'd timed it to
> >  30degrees max advance, then it'd be at 0 degrees tdc when checked
> >  statically.  Duh.
>
> Bentley shows the AB as having 27-30 degrees of mech advance. That's their
> tolerance. This means that to get exactly 30 degrees of total 
> advance you would
> need to set the idle timing to 0-3 deg BTDC. If you really want to be right at
> 30 deg you have to do the math and mark where 30 will be and time it there at
> max advance. ONLY THEN can you back up and mark the pulley as to 
> where the idle
> setting should be. Once you have done this you can just set it again later at
> idle using this mark. Of course this only works as long as you stick to the
> same distributor.

	Dang it -- I meant to write that I found that it was set to a 
couple of degrees AFTER tdc.

	If their 30degree tolerance is rock-solid, then I'm going to 
to *advance* it a couple of degrees up to zero tdc @ static, so that 
the max advance is 27-30.  (Now, given that the total advance could 
only be 30 net degrees, then I've got it set to (27-30) minus two, or 
like 25-28 or so.

	Or something... :-o

	I'll need to get some better measurements of the pulley and 
figure out the 30 degree spot for myself.

-Greg

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