Open Wheel Parts & Accessories

SPARK PLUG HEAT RANGE/CROSS REFERENCE Thread Heat

Standard Non-Resistor Spark Plugs

Power/Projected Tip Non-Resistor Spark Plugs

Size/Reach

Hex

Range

Autolite

Champion

NGK

Accel

Autolite

Champion

NGK

Chevrolet, Chrysler (Wedge), Oldsmobile, Pontiac - Standard Reach - Flat Seat With Gasket

Hot

— — — — — — — —

—

—

— — NGKR5670-5

NGKB6S NGKB7S NGKB8S

— AUTAR73 — AUTAR72

— NGKR5670-6 — NGKR5670-7

14mm/3/8"

13/16"

AUT353

CHPJ4C

— —

— — NGKR5670-8 — — NGKR5670-9

Cold

—

Chevrolet (Big Block), Chrysler (Hemi) - Flat Seat With Gasket

Hot

AUTAR3935 CHPC63CX NGKR5671A-7 AUTAR3934 CHPC61CX NGKR5671A-8

—

— CHPC63YC

—

— AUTAR3911 CHPC61YC NGKR5672A-8

14mm/3/4"

5/8"

AUTAR3933 † AUTAR3932 †

CHPC59CX NGKR5671A-9 CHPC57CX NGKR5671A-10

— AUTAR3910 †

CHPC59YC NGKR5672A-9

— —

— CHPC57YC NGKR5672A-10

Cold AUTAR3931 CHPC55CX NGKR5671A-11

— —

—

Chevrolet (Big Block), Chrysler (Hemi) - Flat Seat With Gasket

Hot

— —

— — — — — —

— —

— — NGKBP5ES — — NGKBP6ES

AUTAR2593 AUTAR2592

— —

— AUTAR53

— NGKBP7ES

14mm/3/4"

13/16"

— —

— AUTAR52 CHPN59YDR

— — —

— CHPN57DR

— AUTAR51 — AUTAR50

— —

Cold

— —

Chevrolet (Small Block), Ford (Small Block) - Conical/Tapered Seat

Hot

— —

— ACL0276S-4*

— —

—

— — NGKR5673-6

—

— — NGKR5674-6

AUTAR135 CHPV63C

NGKR5673-7

— AUTAR13 — AUTAR12

— NGKR5674-7 — NGKR5674-8

14mm/.460"

5/8"

AUTAR134 AUTAR133

—

—

— NGKR5673-8

— — —

— — NGKR5674-9 — CHPV59YC NGKR5674-10

AUTAR132 CHPV59C — CHPV57C

NGKR5673-9 NGKR5673-10

Cold

— —

—

Chevrolet (Big Block), Ford - Conical/Tapered Seat

Hot

— — — — — —

— — — — — — — — — —

— —

— CHPRS9YC

— —

— —

— AUTAR94

— NGKR5724-8

14mm/.708"

5/8"

AUTAR474 CHPS59C AUTAR473 CHPS57C

— AUTAR93 CHPS59YC NGKR5724-9

— AUTAR92

— NGKR5724-10

Cold

-

CHPS55C

—

-

—

—

Ford (Windsor and Big Block) - Conical/Tapered Seat

Hot

— — — — — — — —

—

— —

— —

— AUTAR33 — AUTAR32

—

18mm/.460"

13/16"

— NGKAP8FS

Cold — Important Note: Use cross reference chart as a guide only. Due to differences in design and material, plugs listed in cross reference are not exactly alike. * Signifies “shorty” style spark plug. † Special Autolite Racing “X” style electrode spark plug, which alleviates piston/spark plug clearance issues, is also available; add “X” to end of part number. — — —

Spark Plug Diagnosis

Pictures Courtesy Of Autolite

• Determine the thread diameter, length (reach), and whether tapered or gasket (flat) seat. • Select gap style. • Select heat range. • Adjust fuel mixture and spark advance timing for maximum performance. • Inspect plugs and pistons for evidence of detonation, abnormal combustion, or excessive temperatures. • Stay with the same plug type after final heat range selection unless major modifications have been made (increasing the horsepower or operating range). Spark Plug Heat Range Tech čë>ÀŽ«Õ}½Ã…i>ÌÀ>˜}i]`iw˜i`>Ã̅i“i>ÃÕÀiœv…œÜv>ÃÌ̅ï«œv̅i«Õ}`ˆÃÈ«>ÌiÃVœ“LÕÃ̈œ˜…i>Ì]V>˜À>˜}ivÀœ“ >ÏœÜ>Ãxääc̜>Ã…ˆ}…>ÃÓ]xääc°>˜Õv>VÌÕÀiÀÃœvviÀ«Õ}Ș“>˜Þ…i>ÌÀ>˜}iÃ]vÀœ“Vœ`̅ÀœÕ}…“i`ˆÕ“…œÌ]̜ÛiÀÞ …œÌ°ÌˆÃˆ“«iÀ>̈Ûi̅>Ì̅i«Õ}ÃÌ>ÞVœœi˜œÕ}…̜«ÀiÛi˜Ì«Ài‡ˆ}˜ˆÌˆœ˜œÀiiVÌÀœ`i`iÃÌÀÕV̈œ˜]>˜`Ã̈Ài“>ˆ˜…œÌi˜œÕ}… ̜LÕÀ˜œvvVœ“LÕÃ̈œ˜`i«œÃˆÌÃ̅>ÌvœÀ“>Ì̅iwÀˆ˜}̈«°č«Õ}̅>̈ÃiÝViÃÈÛiÞVœ`œÀ…œÌvœÀ̅i>««ˆV>̈œ˜ˆ˜µÕiÃ̈œ˜ ܈iÛi˜ÌÕ>ÞV>ÕÃi̅ii˜}ˆ˜i̜“ˆÃwÀi°7…i˜ܜÀŽˆ˜}܈̅>˜i˜}ˆ˜i̅>̈ÃÃ̜VŽœÀ“ˆ`Þ“œ`ˆwi`]ˆÌˆÃœvÌi˜LiÃÌ̜ÕÃi ̅i«Õ}ÀiVœ““i˜`i`LÞ̅iV>À“>˜Õv>VÌÕÀiÀ°œÜiÛiÀ]ˆv̅iVœ“«ÀiÃȜ˜À>̈œ…>ÃLii˜>ÌiÀi`]>`ˆvviÀi˜Ì…i>ÌÀ>˜}i «Õ}“>ÞLiÀiµÕˆÀi`°>˜ÞÀ>ViÀÃÀiÞÕ«œ˜̅iˆÀi˜}ˆ˜iLՈ`iÀvœÀ«Õ}…i>ÌÀ>˜}iÀiVœ““i˜`>̈œ˜Ã°v>À>ViÀˆÃ՘ÃÕÀiœv ̅iVœÀÀiVÌ…i>ÌÀ>˜}i̜ÕÃi]ˆÌˆÃ>Ü>ÞÃÀiVœ““i˜`i`̜ºÃÌ>Þœ˜̅iÃ>viÈ`i»>˜`ÕÃi>Vœ`iÀ«Õ}°čÃ܈ÌV…ˆ˜…i>ÌÀ>˜}i V>˜V…>˜}i̅iÌi“«iÀ>ÌÕÀiœv̅ië>ÀŽ«Õ}̈«LÞÇ䇣Óäc°v̅i«Õ}ÃiiVÌi`ˆÃ̜œVœ`]ˆÌ܈iÛi˜ÌÕ>ÞvœÕ>˜`“ˆÃwÀi] LṎÌ܈˜œÌ`>“>}i̅ii˜}ˆ˜i°č«Õ}܅ˆV…ˆÃ̜œ…œÌV>˜V>ÕÃi«Ài‡ˆ}˜ˆÌˆœ˜>˜``i̜˜>̈œ˜]œvÌi˜ÀiÃՏ̈˜}ˆ˜>ÃiÛiÀiÞ `>“>}i`i˜}ˆ˜i° Normal Fuel Fouled Detonation Oil Fouled

2019 OPEN WHEEL PARTS AND ACCESSORIES

507

Made with FlippingBook flipbook maker