[dgluyas]

Dear Ron. I am running a 2332cc with 48mm Webber IDFS
The venturis are 42mm(valve size on intake =40mm)
The mains are 145s
50 idles
200airs
Thing to realise is that 45Dells are not way too big for your motor!
It is important to know how big your valves are .
Your venturis should be about the same size as your valves for medium performance and streetability, and about 2-3mm larger than valve sise for full on race engines.(mine is mostly drag racing)
So my question is ..are you running 37mm intake valves??I doubt you are. So what you need to do is..

1. adjust your valves and check your venturis are about the same size as your valves)
2. synchronise your carb flow
3 .drive it again
remember that up to 3500rpm you are still on idles and above that your' e mains cut in .
You need to reduce your mains in size by 5' until it sputters on acceleration then go up one size.
You need to do the same on idles until it wont cruise below 2500rpm without sputtering.
Remember too rich and it will run but foul plugs
too lean and long term its no good either.
Dont look at what other people run.. even though I have listed my parameters, in the end it only gets you in the ball park. You need to keep changing jets and listen to how its running.(as you are doing) P.S your venturis are still ok if you just adjust your jets to suit . You will have a lot better low down torque with smaller venturis and they are somewhat costly ! Good luck!

David