Champion Copper Plus Spark Plug 511

Description

The Champion 511 Spark Plug (J11C) is part of the Champion Copper Plus Small Engine line, designed to deliver reliable ignition performance for small engines and vintage automotive applications. This spark plug features a nickel center electrode with a copper core to improve conductivity and help regulate heat for longer service life.

Engineered as an OE-style replacement, the Champion 511 is built to ISO and SAE standards, offering dependable ignition, improved corrosion resistance, and reduced fouling in demanding operating conditions.

With a 14 mm thread diameter, flat seat design, and 0.375 in reach, this plug is commonly used in classic vehicles, agricultural equipment, and small engines, especially in vintage Buick, Chevrolet, Chrysler, Dodge, Packard, and Plymouth engines.

Features

• Copper Plus design for dependable performance

• OE-style replacement spark plug

• Copper core center electrode improves heat control and conductivity

• Resists fouling for reliable ignition

• Superior corrosion resistance

• Built to ISO and SAE standards for proven durability

Specifications

Brand: Champion
Part Number: 511
Plug Type: J11C
Classification: Champion Copper Plus Small Engine
Grade Type: Standard Replacement
Part Description: Spark Plug

Electrode

• Center Electrode Tip Material: Nickel

• Center Electrode Design: Standard

• Center Electrode Diameter: 0.1 in

• Ground Electrode Quantity: 1

• Ground Electrode Material: Nickel Copper Alloy

• Ground Electrode Core Material: Nickel

• Ground Electrode Tip Material: Nickel

Dimensions

• Thread Diameter: 14 mm / 0.551 in

• Reach: 0.375 in

• Hex Size: 0.813 in / 20.650 mm

• Seat Type: Flat

• Washer Included: Yes

• Washer Type: Crush

• Installed Height: 2.41 in

• Taper Diameter: 0.31 in

Performance

• Manufacturer Heat Range: 11

• Pre-Gap Size: 0.030 in / 0.76 mm

• Resistor Type: No

Additional Details

• Electrical Terminal Type: Removable Nut

• Hex Type: Hex

• Indexed: No

• Subject to Prop 65: No

Applications

The Champion 511 (J11C) spark plug is commonly used in vintage automobiles and classic engines, including examples such as:

Buick

• Century Series 60 (1938–1942)

• Roadmaster (1940–1952)

• Special (1938–1953)

• Super Series 50 (1940–1952)

Chevrolet

• Bel Air (1950–1962)

• Biscayne (1958–1962)

• Corvette (1958–1960)

• Impala (1959–1962)

• C/K Series trucks and Suburban (1962–1966)

Chrysler

• Imperial (1937–1950)

• New Yorker (1939–1950)

• Windsor (1940–1954)

• Saratoga (1939–1950)

Dodge

• Coronet (1949–1956)

• Power Wagon (1950–1956)

• Meadowbrook (1949–1954)

• B-Series trucks (1948–1953)

Packard

• Clipper (1953–1956)

• Patrician (1951–1954)

• Custom Eight (1950)

Plymouth

• Belvedere (1953–1956)

• Cranbrook (1951–1953)

• Savoy (1953–1956)

• Suburban (1949–1956)

Pontiac

• Catalina (1950–1954)

• Chieftain (1949–1954)

• Silver Streak (1948–1952)

• Streamliner (1942–1952)

Additional compatibility may include Crosley, DeSoto, Hudson, Nash, Oldsmobile, Pierce-Arrow, Tucker, and Vauxhall models.

Fitment Note

Due to the wide range of vintage applications, always verify compatibility by checking:

• Engine size and configuration

• Thread diameter and reach

• Seat type and heat range

• OEM spark plug specifications