Quote:
Originally Posted by Jim A
I have had my GMC for a while and rebuilt the one barrel Holley a few times.
That doesn't seem to have saved me from the stupid question: What is a power valve?
|
Not a stupid question!
The power valve enriches the mixture off idle at low manifold vacuum, as when the engine is under load with the throttle open. Part #26 in this diagram:
https://www.carburetorfactory.com/expvw11.html