JP Racing; Store » Other » Holley Temp » Power Valves » HOLLEY Single Stage Power Valve Standard Flow 8.5 In Hg
HOLLEY Single Stage Power Valve Standard Flow 8.5 In Hg
HOLLEY Single Stage Power Valve Standard Flow 8.5 In Hg - Image 2
HOLLEY Single Stage Power Valve Standard Flow 8.5 In Hg - Image 3

HOLLEY Single Stage Power Valve Standard Flow 8.5 In Hg

£23.45 Inc. VAT

Only 1 left in stock

SKU: HOL125-85 Categories: , , Tag: Brand:

Description

Part Number: 125-85

Holley 8.5 in. Hg Single-Stage Carburetor Power Valve

Essential power enrichment component engineered for Holley carburetors, delivering precise fuel enrichment under engine load at 8.5 in. Hg vacuum.

Key Features & Performance Benefits

  • ☑ Calibrated 8.5 in. Hg Opening: Opens precisely when engine manifold vacuum drops to 8.5 in. Hg to provide seamless fuel enrichment under acceleration.
  • ☑ Single-Stage Standard Flow: Delivers reliable power enrichment for performance street, strip, and motorsport applications.
  • ☑ Complete Sealing Solution: Supplied with a fresh power valve gasket to ensure a leak-free seal upon installation.
  • ☑ Precision Engineering: Manufactured by Holley to rigorous quality standards for consistent metering response.
  • ☑ Eliminates Lean Bog: Prevents lean hesitation and flat spots during hard throttle transitions.

Technical Specifications

Brand Holley
Manufacturer Part Number 125-85
Valve Type Single-Stage
Flow Capacity Standard Flow
Opening Vacuum 8.5 in. Hg (inHg)
Gasket Included Yes
Compatibility Holley Performance Carburetors

What’s Included in the Box

  • 1x Holley 125-85 8.5 in. Hg Single-Stage Power Valve
  • 1x Power Valve Sealing Gasket

Engineered by Holley Performance Brands, the 125-85 power valve is vital for fine-tuning your carburetor’s power enrichment circuit. At JP Racing, we supply genuine Holley motorsport hardware backed by expert UK technical support and fast nationwide dispatch.

Frequently Asked Questions

The 8.5 in. Hg rating indicates the engine manifold vacuum level at which the power valve begins to open. When engine vacuum drops below 8.5 inches of mercury (under acceleration or heavy load), the valve opens to enrich the fuel mixture and prevent engine hesitation.

Measure your engine's steady idle vacuum in gear (for automatics) or neutral (for manuals) using a vacuum gauge. A general rule of thumb is to select a power valve rated approximately 1.5 to 2 in. Hg below your engine's steady idle vacuum reading.

Yes, the Holley 125-85 power valve comes complete with a proper power valve sealing gasket in the package for a leak-free installation into your metering block.

Reviews

There are no reviews yet.

Be the first to review “HOLLEY Single Stage Power Valve Standard Flow 8.5 In Hg”

You may also like…

Related products