Holley 125-210 Two Stage Power Valve For Model 4145 Carburetors
Retail Price: $36.99
Sale Price:
$CALL
Features
- Includes Gasket
- P/N 125-210
- 2.5in Hg 2nd Stage Opening Vacuumthis is a test
- 9.0in HG 1st Stage Opening Vacuumthis is a test
Tech Notes
Two-stage power valves ARE NOT RECOMMENDED for performance applications.
Description
The power valve is a key component of the power enrichment system of Holley performance carburetors. The power enrichment system supplies additional fuel to the main system during heavy load or full power situations. Holley utilizes a vacuum operated power enrichment system and a selection of power valves is available to time this system's operation to your specific requirements. Each Holley power valve is stamped with a number to indicate its vacuum opening point. For example, the number 65 indicates that the power valve will open when the engine vacuum drops to 6.5in Hg, or below. An accurate vacuum guage, such as Holley P/N 26-501, should be used when determining the correct poewr valve to use. A competition or race engine which has installed a long duration, high overlap cam will have low manifold vacuum at idle speeds. If the vehicle has a manual transmission, take the vacuum reading with the engine thoroghly warmed up and at idle. If the vehicle is equipped with an automatic transmission, take the vacuum reading with the engine thoroghly warmed up and idling in gear. In either case, the power valve selected should have a vacuum opening point about 2in Hg below the intake manifold vacuum reading taken.
Manufacturer Information
Item: Two Stage
Item Number: 125-210
Approximate Item Package Dimensions: 5" x 4" x 2"
Approximate Item Package Weight: 1 lbs
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