Champion 841 J8C Racing Spark Plug-Gas, 3/8 Reach, 13/16 Inch Hex, Hot

#271J8C

Champion 841 J8C Racing Spark Plug-Gas, 3/8 Reach, 13/16 Inch Hex, Hot

Name: Champion 841 J8C Racing Spark Plug-Gas, 3/8 Reach, 13/16 Inch Hex, Hot
Brand: Champion
SKU: 271J8C
Price: 3.99 USD
Availability: InStock
Rating: 5 (1 reviews)

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Product Summary

Universal Fit, Gasket Spark Plug Seat Style

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Key Specs

MFG. Part #	841 J8C
Brand	Champion
Thread Pitch	14mm

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Installation Details

Spark Plugs Installation Instructions (271J8C)

Performance Spark Plug Buyer’s Guide

Installation Tips

While 5/8" (16mm) and 13/16" are the two most common plug hex sizes, plugs can have a hex as small as 8mm or larger than 1".

If you're a tuner or engine builder in search of the perfect spark plug for your current project, pay special attention to the hex size required. Remember to take into consideration not only the diameter of the cylinder head, but also the added thickness of the plug socket needed for installation.

A spark plugs reach is calculated by the length of the threads. It is measured from the seat of the plug to the end of the threads.

It should be noted that the reach does not include the electrodes, or an extended metal shell. When custom-selecting a spark plug, the electrode length and projection should be included in the calculation when taking into consideration the clearance in the combustion chamber.

WARNING: Spark plugs with different seat types are NOT interchangeable.

Spark plugs with a flat seat must be used in engines designed for a gasket seal.
Spark plugs with a tapered seat must be used in engines designed for a tapered seal.

Use of an improper plug in an engine will result in engine damage.

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Champion 841 J8C Details

Projected tip for gasoline. For double hump heads. Most popular for IMCA Modifieds. Recommended for gas. 14mm plug, .375" reach, 13/16" hex.

Plug gap will depend on output of distributor and fuel being used. Most applications using methanol will be at .022" - .025". If your ignition sytem is a higher output, maybe able to go as wide as .030". Gas application should be .030" - .035". You should also consult manufacturer of distributor for their recommendations.

Champion Racing Series plugs include all the features of their conventional plugs, but are built with extreme engine conditions and durability in mind.

Nickel Alloy Ground and Center Electrodes
Copper Core Center Electrode Allows for Increased Conductivity and Heat Control
14mm, .375" reach, 13/16" hex
Projected
Heat Range: Hot (59)

Item Details

14mm, .375" Reach, 13/16" Hex

Application

Spark Plug Application Chart

Charts

Champion Spark Plug Guide (JPG)

Champion Heat Range Guide (JPG)

Champion Conversion Chart (JPG)

Spark Plug Gapping Instructions (JPG)

Guides & Documents

Spark Plugs Installation Instructions (271J8C)

Performance Spark Plug Buyer’s Guide

Spark Plugs Technical Information (271J8C)

CARB Warning

For race/ off road use only

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

CARB warning

Champion 841 J8C Specifications

KEY SPECS
MFG. Part #	841 J8C
Brand	Champion
Thread Pitch	14mm

GENERAL
Spark Plug Seat Style	Gasket
Spark Plug Reach	0.375"
Resistor	No
Insulator Type	Non-projected
Spark Plug Heat Range	8
Core Material	Copper
Tip Material	Nickel Alloy
Overall Length	14.00"
Wrench Size	13/16"
Operating Temperature	59.00 °F
Sold in Quantity	Each
Notes	Hot
GTIN Code	037551011087

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Will continue to buy.

5.0

8 years ago

Harper Danger

Christoval, Tx

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Just as expected!

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