RE: [T3] '70 square tuning

["Adriel Huntington Rowley" <architect_7@hotmail.com>]

So, one needs vacuum advance?  My Type 4 distributor has none, and before
this electronic letter, I was thinking that was the reason for stumbling
when letting off the gas (the quicker the let-off, the worse it is).  I got
back my original, with the vacuum advance, but the Type 3 vacuum advance
will not work, right?  So, are Type 4 distributor vacuum cans available, and
for how much?  I am tired of putting my teeth into the steering wheel.


Sincerely,
Adriel H. Rowley
---------------------------------------------------------------------------

This is what the vacuum advance does for you in a distributor that has both,
but the vacuum port, the one that provides the vacuum, has to be matched to
the distributor. It's not straight manifold vacuum; it's a special port that
provides high vacuum when the throttle is only open a little bit, but none
at idle and none at full throttle. The effect of this is to improve gas
mileage at cruising speed without damaging the engine at full throttle and
without giving up any full throttle performance.


-- 
Jim Adney
jadney@vwtype3.org
Madison, WI USA

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~