Rota_Motor wrote:and what makes the bosch 009 dizzy so good?
They are not.
The 009 is a cheap convienent way to replace the stock dizzy.
Quality is poor and because they need no more than 32 degrees max advance the static timing can vary, where as the stock could be set at 7.5 before.
The reason your mechanic said not to touch it is probabally because he set it at 32 deg and if you set it statically at 7.5 it could change the 32 max setting.
The best dizzy is a SVDA - single vacuum dual advance. It has vacuum and centrifugal. Quality is heaps better and has a better curve. BUT they are like $200 US.
A 009 can be bought for $100 Aus.
I dont know if Aus VW's came with SVDA or just single vacuum
009 is also an easy hook up for dual carbs where getting a good vac signal can be diffucult at best.
The best set up is probabally a MSD where you can set your own spring curve be ....... $$$$$$
009s are also prone to suffer from flat spots. Especially when mate to a 34 Pict. A 30 Pict seems to run better.
Go to
www.aircooled.net and have a look at the different ones for sale there. Also have a read of their tech articles. There are some dizzy articles there.
Barry