JP Racing; Store » Other » Holley Temp » Accelerator Pump Parts » HOLLEY Diaphragm – 30CC
HOLLEY Diaphragm - 30CC

HOLLEY Diaphragm – 30CC

£8.33 Inc. VAT

Only 3 left in stock

SKU: HOL135-5 Categories: , , Brand:

Description

Part Number: 135-5

Holley Single Stage Power Valve – 5.5″ Hg Vacuum

Precision fuel enrichment valve engineered for Holley modular carburetors.

Key Features

  • ✓ Opens precisely at 5.5″ Hg manifold vacuum to prevent lean engine hesitation
  • ✓ High-grade elastomer diaphragm for reliable performance with modern pump fuels
  • ✓ Includes high-quality sealing gasket for a precise, leak-free fitment
  • ✓ Standard flow design compatible with Holley 2300, 4150, and 4160 carburetors

Technical Specifications

Brand Holley
Part Number 135-5
Power Valve Type Single Stage
Vacuum Rating 5.5″ Hg
Flow Capacity Standard Flow
Gasket Included Yes

What’s Included in the Box

  • 1x Holley 135-5 5.5″ Hg Single Stage Power Valve
  • 1x Power Valve Mounting Gasket

As an authorized distributor of genuine Holley products, JP Racing ensures that your fuel system components meet the highest standards of motorsport quality. Backed by dedicated UK technical support and fast domestic shipping options.

Frequently Asked Questions

The 5.5" Hg (inches of mercury) rating designates the engine vacuum level at which the power valve opens. When engine load increases and manifold vacuum drops below 5.5" Hg, the valve opens to enrich the air/fuel mixture, preventing lean stumbles under acceleration.

Common signs of a ruptured or blown power valve include an excessively rich idle condition, black exhaust smoke, fouled spark plugs, or inability to adjust the idle mixture screws properly. Replacing a ruptured power valve restores correct fuel metering across the rev range.

Yes, the Holley 135-5 fits most traditional Holley modular carburetors including model 2300, 4150, and 4160 series. Always check your engine's idle vacuum in gear to ensure a 5.5" Hg valve matches your engine vacuum profile (typically selected 1.5 to 2" Hg below stable idle vacuum).

Reviews

There are no reviews yet.

Be the first to review “HOLLEY Diaphragm – 30CC”

Related products