setting igniton timing with weber carb

[Yolandi2]

ok guys so ive fitted a twin choke DGAV carb to my 1.8 8v (32/26) using an adapter plate on the base of the carb to go onto the stock manifold,
since then its all ways idled lumpy, ive tried we setting the igniton timing with a light but I get conflicting advice on how exactly to do it, do I plug the vac line then set it or leave the vac line on and set it? it seems to idle better if you set it with the vac line plugged but makes more power with it set attached??

ive left the big vac line from the manifold to the brake booster alone and its currently all plumbed up as standard, I simply took the thin vac line off the peirburg and attached it to the weber, if that makes a difference?

[unknownmale]

Not specifically a guide for the DGAV but helpful - http://www.webercarburetors.com/ppw/htm ... _best_.htm

Typically I start out with the mixture screw pretty high and the idle fairly high, play with the timing until it sounds best, then start pulling everything down

[mark1gls]

Forget the timing light, advance timing till the car “pinks” under load then retard it a little to stop the “pinking”. Never used a timing light on my car, you need a quite road to drive up and down and if you have a hill to drive up that helps put the car under load.

I think you unplug and block the vac hose going to the dissy if using a timing light as with the hose connected it will adjust the timing with the vacuum as you rev the car.

If you mark where is dissy is before messing with it so you can always move it back to where it was and it gives you an idea of how far you have twisted it.

FYI...Advance timing turn the dissy clockwise and retard is anti clockwise.

[james butler]

what sound does pinking make?

[unknownmale]

Heard a lot of people say pinking, not sure where it comes from, but pretty sure it's just pinging/ pre detonation but a different word for it.

[mark1gls]

https://en.m.wikipedia.org/wiki/Engine_knocking