i have a 1.6 8 valve motor with dual weber 40 dcoe carbs.  Do you hook up the vacum adavance or not?? If not do you just plug it on the distributer?? if its plug how will it adavance it self? instead of having it reweighted could i just buy a msd and msd timing controller?? please help im lost.. i had it hooked up to the vacum advance but now its making a loud clicking noise so i un hooked it and it dont run that well..

 

Call weber there was actually a link not to long a go I think of all weber rebuilds and diagrams and such so do a search for weber or like I said just call them up they have had to had the prob. before

i have a 1.6 8 valve motor with dual weber 40 dcoe carbs.  Do you hook up the vacum adavance or not?? If not do you just plug it on the distributer?? if its plug how will it adavance it self? instead of having it reweighted could i just buy a msd and msd timing controller?? please help im lost.. i had it hooked up to the vacum advance but now its making a loud clicking noise so i un hooked it and it dont run that well..

Check the article archives for a technical article on this very subject.

-Eric

From the archives:

Ignition timing issue. There is not a correct source of vacuum for vacuum advance on your distributor. The weber 40 DCOE doesn't have a port for that. I've seen many sidedraft users attached the vacuum line to the manifold. This is incorrect because the vacuum on the manifold is backwards to what you would want. It is high at closed throttle and low at WOT. Furthermore, the mechanical advance on a stock suzuki distributor is not enough by itself. The stock distributor advances 7 degrees, or 14 degrees on the crank, at 5500 rpm. Disclaimer -this was observed on the distributor tested. Suzuki factory specs are unkown at this time. So, if you set the initial advance at 10 degrees BTDC, you will only end up with a total advance of 24 degrees. A motor rewind and distributor shop was able to reweight and cut back the mechanical stops on our distributor so that we get 12 degrees, or 24 degrees on the crank, of mechanical advance at 4000 rpm.  At 12 degrees BTDC initial we observed a full 36 degrees of advance at 4000 rpm. This will bring your suzuki engine alive.

This is also a problem with SU carbs which are commonly used in the UK. A number of people have solved this problem by tapping a vacuum takeoff on the other side of the throttle butterfly. I haven't done this myself so I can't say whether or not it would work on a Weber set up.
I don't see any reason why you can't use an MSD set up or any other aftermarket set up. I believe it would be a fairly simple job to rewire the distributor to place an ignition controller between the generator and the output transistor. Thats on my list of future projects.

I keep reading that page over and over  i dont under stand it. Can anyone make any sense of it??  Im not sure what it means for the vac advance do i just leave it open and or the intake for the weber it has a hole do i hook the vac like from the brake booster to it.  is there any vac line to be hooked up and what should timing be set to. should i have the distributer reweighted?? any help please