1

Topic: Timing question

Ok now i'm confused.
What is the proper timing for a "73 super bug. The manual says 5
degrees before TDC. But I was looking at the VWhelp.com web page
about timing and they are talking about 27 degrees to 31 degrees
BTDC. I have a stock 1600 and a distributor I believe is a 009. It
has a centrefugial advance. So anyway how does 5 degrees work into
27 degrees?


Stu

2

Re: Timing question

The timing depends on the distributor model used. The 73 originally
came with a dual-vacuum distributor that retarded the timing at
idle, and I think actually called for 5 after TDC with the vacuum
connected. The 009 has no vacuum to sense engine load, and advances
only by rpm. (Generally not the way to do it, but it can work "OK.")
To avoid too much advance under load, it should be timed at about 31
btdc at around 3000 rpm (full advance). This is not really the best
advance for highway cruising, but you have to compromise without a
vacuum unit to avoid engine damage.
Many people have changed back to a vacuum advance unit and found
better mileage and throttle response. www.aircooled.net has some
good tech info on this, and sets up SVDA units for this use.

stu wrote:
>
> Ok now i'm confused.
> What is the proper timing for a "73 super bug. The manual says 5
> degrees before TDC. But I was looking at the VWhelp.com web page
> about timing and they are talking about 27 degrees to 31 degrees
> BTDC. I have a stock 1600 and a distributor I believe is a 009. It
> has a centrefugial advance. So anyway how does 5 degrees work into
> 27 degrees?
>
>
> Stu
>

3

Re: Timing question

stu wrote:
>
> Ok now i'm confused.
> What is the proper timing for a "73 super bug. The manual says 5
> degrees before TDC. But I was looking at the VWhelp.com web page
> about timing and they are talking about 27 degrees to 31 degrees
> BTDC. I have a stock 1600 and a distributor I believe is a 009. It
> has a centrefugial advance. So anyway how does 5 degrees work into
> 27 degrees?
>
>
> Stu
>>>>>>>>>>>> FROM Sean ; There are 2 way,s too time a buggy ? one is
with a test lamp ? <<, Look,s like a ice pick with a wire commin out
of it ? With this tool ya ground wire. Sett the motor at 5 or 7.5 or
10 degrees or the timming mark on OEM pulley . Then turn dizzy till
the light come,s on ? Ok now thing too keep in mind here is that the
OEM pulley or where you time it depend,s on the type of dizzy in the
motor ? <, This is due too the different type,s of vaccum advances
used on the dizzy,s over the year,s ? <, Meaning that if you run a
OEM crank pulley the mark on it could be 2 degree,s BTDC or 5 or 7.5
or 10 ? << In other word,s the crank pulley timming mark,s must
match type of dizzy used ? Now im gettin too that ? LMAO If your
dizzy is a 009 it has no visible vaccum advance on it . < This is
because it is a mechanically advance system of counter weight,s
under the striker plate ? The 009 dizzy time,s at 10 degrees BTDC <
Now in order too time your motor properly you need an OEM crank
pulley with a 10 degree mark or a degree pulley is preferd ? The
reason a degree pulley is preferd too time a 009 dizzy is because
once you establish a rough timming of 10 degree,s you can put a
stroboscopic timming light on the motor at number 1 cylinder? Then
other wires neg and pos ? With motor warmed up using a stoboscopic
timming light you can check that the mechanical advanced 009 dizzy
is timed at 32 degree,s total advance at 3500 RPM ? < Now i urge you
too play with this cause it will help you too understand ? <,
Meaning that a stock OEM motor when reved will plain out at roughly
3500 RPM So once your ear is in tune too where the 3500 rpm is at.
the need for a tachometer too tell you where 3500 rpm is at is
eliminated ? Now another thing you must understand is that because
the 009 dizzy is mechanical advanced dizzy ? It can be few degrees
off . << Due too wear usually lil plastic holder,s break off on the
spring,s under the striker plate etc. So it is reccomended that you
use a stroboscopic timming light and a tachometer , too time it ? I
use a craftsman tach and dwell, voltage meter in one unit like 42
buck,s i think ? And a craftsman stroboscopic timming light . In the
summer i run 28 ta 30 degrees total advance at 3500 rpm ? In winter
i try ta get 31 or 32 degrees total advance at 3500 rpm ? Never
exceed the 32 degrees mark this will cause the motor too run hot ?
And is a slow engine cook ?  Sean