A
Anonymous
Guest
Does anyone know the CFM flow rate for the DCOE carburator? Either 40 or 45 will do. Curious. 
Depending on the venturi, as much as 600cfm for the 45 DCOE.
The flow rate of a Weber DCOE is through each barrel.
The DCOE 40 flows worse with 34 mm venturis than a DCOE 45 with 32 mm venturis.
In both cases, it is about 175 cfm per barrel at 1.5" Hg, or 350 cfm.
A set of DCOE 45's with 40 mm bores is about 296 cfm per barrel at 1.5" Hg, or 592 cfm.
When looking at the DCOE 40 with 32 or 34 mm venturis, remember that it has the smaller venturis and throttles than a 500 cfm 2-bbl carb, and it flows 354 cfm at 1.5" Hg.
Summary?
The 500 CFM Holley is a very good emulator of a DCOE 40, at half the price.
The DCOE 40 flows worse with 34 mm venturis than a DCOE 45 with 32 mm venturis.
In both cases, it is about 175 cfm per barrel at 1.5" Hg, or 350 cfm.
A set of DCOE 45's with 40 mm bores is about 296 cfm per barrel at 1.5" Hg, or 592 cfm.
When looking at the DCOE 40 with 32 or 34 mm venturis, remember that it has the smaller venturis and throttles than a 500 cfm 2-bbl carb, and it flows 354 cfm at 1.5" Hg.
Summary?
The 500 CFM Holley is a very good emulator of a DCOE 40, at half the price.
