/6 Webers, Questions Options

[EdwardBlume]

How can you tell what size Webers you have? Is there a website for /6 motors that lists out the configurations? I want to see if the 2.4 set up I have (just rebuilt) will work on a 930 / 03.

Also, how do you measure the headers, will they work?

[flyer86d]

The 40 or 46 is the throttle bore size in millimeters. Flip the carb over and measure. I think that the carb type is stamped into the carb body. I'll look at the set that I have in the morning. 40 IDS are easy to identify as they have a brass squirt tube that goes up and curves pointing straight down the center of each venturi. Bruce Andersons book gives you a good starting point as well as some of some of the formulas to calculate venturi size and baseline jetting. Most parts are available thru PMO as well as others.

Weber's like clean fuel. Idle jets clog easily. Weber carbureted cars run from one third to one half way thru their range on the idle jets. It is dismaying to have a cylinder lay down when you are planning to blow off the guy next to you at a stop light or toll booth because of a clogged idle jet. Also, the idle circuit likes to be a little rich so they transition to the mains without a stumble, particularly the 46IDA's. Our old track car had them and those who tried to keep up said it was like following a refinery.

Charlie