I'd venture to guess that most Webers on most street cars are set up wrong. In fact, I'm pretty comfortable saying that most alternative carburetors people purchase and mount are set up wrong, as well as often being just plain too big. Be it Webers or a Holley. Lots of V8 motorheads love the Holley 750 double pumpers [without knowing what that actually means and what models there are], even though it's actually a very poor carburetor for street use.
Certainly a Weber can be set up to perform well. The Italian car companies seemed to specialize in doing this all the time. It's a matter of matching the components properly to the application. This starts with venturi sizing, something people never seem to notice. Folks get very busy in discussing "Do I need a 40 DCOE or a 45?" when the question is meaningless. You need to size the venturi to the engine, and then select the main body for that venturi. Right there, that took out 99.9% of the folks that buy a Weber; they have no idea what I just said. You've then got to follow through with determining the right jets, the right emulsifier tubes, etc. None of which is cheap with a Weber. So lots of folks just buy one "preset" from some vendor, mount it, and get the classic poor fuel mileage and lousy performance a Weber is noted for. It's not the Weber's fault, it's that it's not selected for and set up for the engine and application. This applies to Webers, Holley's, SU, ZS, and every other form of carburetor known to man. >>> Bill Gunshannon <[EMAIL PROTECTED]> 05/23/02 08:30AM >>> On Thu, 23 May 2002, Nolan Penney wrote: > Lots of wrong myths about the DCOE abound. Two 40 DCOE, even with the > smallest venturi's available, flow far more air then the most highly > reved Spitfire engine can pull. Translation? Far more carburetor then > engine, and typical lousy fuel mileage and poor lower rpm performance > when operating anywhere but on the race track. A single 40 DCOE will > perform better. Look at the Weber information for selecting venturi > sizes and you will see what I mean. So, is this unique to the Spit?? I drove an old Alfa-Romeo for quite some time when I lived in Europe (back in the days when you could still go fast in most places) and it not only had better gas mileage than my Ford Capri, but performed quite well at both low and high speeds. (As an aside, while difficult to do things like valve adjustment it was one of the best engineered engines I ever ran or worked on.) /// [EMAIL PROTECTED] mailing list /// Send admin requests to [EMAIL PROTECTED] /// or try http://www.team.net/cgi-bin/majorcool /// Archives at http://www.team.net/archive /// Send list postings to [EMAIL PROTECTED] /// Edit your replies! If they include this trailer, they will NOT be sent.
