Hi, going through all that's to be done on my 1965 121 (i.e. preparing the parts order and counting my cash...), I've now come to the fuel system.
Carbs:
For several 10km, I've had the following problem with my HS6's: with the air filters off, when I rev the engine up the two pistons of the SU's go up smoothely almost to the max. At one point, the rear one keeps going up while the other one falls to mid-level of the carb's throat and stays like that. I beleieve it does the same when driving (haven't been able to check ;-)).
Option 1:
These SU's are a bit worn and would deserve a good overhaul, but I doubt a complete overhaul kit will do the job: changing the bushings and all that's in the kit won't solve what I believe is a vacuum problem. So is there a place where one can source the suction chmber and piston for an HS6 carb? at what price? I think it's the only way to get my SU's back on the road. Am I wrong?
Option 2:
I know there are places that sell rebuilt SU carbs, but considering the price, I thought: hey, why not get 2 Weber DCOE 40 instead? I can get a pair for not so much money (1/3 of the new SU's) that are set up as follows: venturis are 32, main jets 130, aux.venturis 4,5, air corrector jets 200, emulsion tubes F9 idle jets 50F8, accel pum jets 35. These units would be on a standard B20E. Do you think they would be suitable without having to change all the settings (adressing the weber converted Volvos owner's here...).
Ok that'a all folk, my post is long enough. Sorry for that, but I think every detail is needed to answer, richt? Thanks in advance for you inputs! Cheers, Séb