Dizzy question including timming help needed!

Post by **The_blue** » 20 Apr 2007, 18:15

I got a 2nd hand electronic dizzy for my CU engine. It came with all the wiring and 2 rotor arms...

one has a wide tip (about 10mm?) and the other was narrow (5mm?) both fit and i've run em both. It seems to run better with the wide one.......

......whick brings me to the timming. The haynes says 6-8 'A'tdc for electronic. I set it to that and it was fine for a while (a week or so)... then it was poping and sluggish so i checked the timming again. Was now 6 before!! I set it to 6 after and it wouldn't rev, sounded a mile out.

I've ended up seting it by ear and it runs better than ever (with the wide rotor arm)

What are the right settings?

Timing done without carb vaccume.

Post by **toolsntat** » 20 Apr 2007, 19:25

Any good???
http://archive.club8090.co.uk/viewtopic ... ght=timing

Post by **HarryMann** » 20 Apr 2007, 19:41

Blue, if that raises any additoonal questions fire away...

Post by **The_blue** » 20 Apr 2007, 19:46

Didn't see anything about the rotor arms.

Any ideas on that?

Post by **HarryMann** » 20 Apr 2007, 19:47

Think I'm going to Wiki that thread Tools'n put up, seems to contain the very essence of the matter after a lot of research by various souls...

Post by **toolsntat** » 20 Apr 2007, 19:50

And.....
https://club8090.co.uk/wiki/Pe ... gnition_01

Post by **HarryMann** » 20 Apr 2007, 19:52

Well, the wider ones would stand a better chance of being in the right place at the right time, but also of arcing. If the dizzie timing is pretty well where it should be, it shouldn't matter too much I reckon.. maybe check which is the later part, if they're both VW

Post by **cumbriankeith** » 20 Apr 2007, 21:17

I thought the wider ones have an inbuilt rev limiter (5400 rpm) - mine works like that anyway tho I seldom rev it that high as it just feels wrong go to me.
http://shop.justkampers.com/advanced_se ... &x=41&y=13

Post by **HarryMann** » 20 Apr 2007, 21:56

So the difference isn't just in the width then...

so never mind the quality, just feel the width

Post by **toolsntat** » 21 Apr 2007, 07:52

Hope this is aint getting boring but there`s some real techy stuff here....
http://archive.club8090.co.uk/viewtopic ... t=struggle
Maybe another bit for the wiki???

Post by **HarryMann** » 22 Apr 2007, 23:56

Thanks toolsn'

How's this for a Wiki synopsis of what's been said in all these historical trreads

http://wiki.80-90.co.uk/index.php/Petro ... rd_systems

Let me know if I have missed any important contributions - thanks

Post by **toolsntat** » 23 Apr 2007, 08:28

Thanks for taking the time to wiki that lot Harryman...

If I see other bits of useful info I`ll tag a link on here...

The_blue, hope this has been of use and you are getting things sorted...

Post by **HarryMann** » 23 Apr 2007, 08:51

Nice to actually have the info from members to fill the wiki out where needed - now I just need a few matchsticks for the old eyelids