brandon davis

iTrader: (3)

i have a friend who has a weber carb that will sell to me for cheap but its a 40mm and i was looking around with search and didnt find specifcs on 40mm to 48mm is it just ventureis or more i have never torn apart a weber so any expierience on this would be great.

jgrewe

iTrader: (1)

You can fit different size venturis in either one. The 40 or 48 refers to the diameter of the top stack. You can't fit 40mm venturis in a 40 mm carb(there would be no narrowing of the air pipe for venturi action) A street car could get away with a 40mm carb, I don't know what the biggest venturi available for them is but it's what you would want. The 48 would be better, with maybe 40mm venturis.

brandon davis

iTrader: (3)

then a 40mm carb wouldnt be most suitable on a stock port 13 6 port.

FB II

nah, get a 45.