1920 Economizer Valve

[/6 Matt]

Can anyone tell me what the economizer valve on a holley 1920 does? What is its purpose.?

 

[/6 Matt]

I guess I should clarify a little. I have read that thr economizer is a two stage power valve, how do you have a two stage power valve if there is only one WOT position?:sign3:

 

[805moparkid]

economizer valve is a power valve.

 

[BillGrissom]

I know you can find photos here if you search the fuel forum. There are 2 fingers on plastic lever that the vacuum actuation rod acts upon, which open spring-loaded ball ports at different times, hence the "2 stage". It richens the mixture at high throttle for more power when needed. The "economy" is when it closes. Same idea as the "power valve" in 4 bbl Holley's, but not replaceable (for tweaking), and I haven't heard that it is damaged by back-fire like power valves often are.

 

[805moparkid]

I know you can find photos here if you search the fuel forum. There are 2 fingers on plastic lever that the vacuum actuation rod acts upon, which open spring-loaded ball ports at different times, hence the "2 stage". It richens the mixture at high throttle for more power when needed. The "economy" is when it closes. Same idea as the "power valve" in 4 bbl Holley's, but not replaceable (for tweaking), and I haven't heard that it is damaged by back-fire like power valves often are.

im sure it could be, there is just a port thru the body that goes to the backside of the valve. and yes it is tweekable by cutting coils off the spring or filling down the arm, even filing on point to make one come in later.