spark plugs

[92coupe]

Does anyone know what plugs to run in edlebrock performer heads? It looks like the long ones but i'm not sure on the number.

Thanks!

[nowrnty]

Does anyone know what plugs to run in edlebrock performer heads? It looks like the long ones but i'm not sure on the number.

Thanks!


Brian,
They would be SPARK plugs and I'd say 8 of them:lol:
Sorry couldn't help myself:D

[92coupe]

Brian,
They would be SPARK plugs and I'd say 8 of them:lol:
Sorry couldn't help myself:D


HA HA That's funny!!!:lol:

[nowrnty]

Dude,
I'm sooo bored I should have stopped by tonight!

[92coupe]

All i did was look at it drink a couple beers and figure up my bills for the week

[Jeff88coupe]

I'm pretty sure edelbrocks run the same as afrs/tfs's. I like the regular copper autolights....3924's are 1 step colder...be good for your motor. Advanced carries autolights...so does wallyworld (cheapest place).

[mustangrfast88]

i was going to say the autolite 24s are the only plug i was told i was able to run in my victor jr heads but i dont know about the performer rpm heads

[Jeff88coupe]

Spark plug guide copied from the corral nitrous forums

5.0
Stock E7 heads:
AUTOLITE
stock--stock 25 (5) [14m, .460 Reach, 5/8" Hex]
1 step colder--24 (4) [14m, .460 Reach, 5/8" Hex]
2 step colder--23 (3) [14m, .460 Reach, 5/8" Hex]
-----AR133 (3) [*recessed tip, racing plug]
-----AR132 (2) [*recessed tip, racing plug]
-----AR131 (1) [*recessed tip, racing plug]

NGK
stock--(UR45) 6945 (Heat Range - 4) [14m, .460 Reach, 5/8" Hex]
1 step colder--(UR55) 2248 (5) [14m, .460 Reach, 5/8" Hex]
2 step colder--(UR6) 7773 (6) [14m, .460 Reach, 5/8" Hex]
-----(R5673-8) 3249 (8) [*recessed tip, racing plug]
-----(R5673-9) 3442 (9) [*recessed tip, racing plug]
-----(R5673-10) 4050 (10) [*recessed tip, racing plug]


GT40 Heads:
AUTOLITE
stock--765 (Heat Range - 5) [14mm, .708 Reach, 5/8" Hex]
1 step colder--764 (4) or 104 (4) [14mm, .708 Reach, 5/8" Hex]**
2 step colder--103 (3) [14mm, .708 Reach, 5/8" Hex]**
-----AR473 (3) [*recessed tip, racing plug]
-----AR472 (2) [*recessed tip, racing plug]

**The difference between the 764 plug and the 104/103 plug is the thread. The 764 plug is a half thread whereas the 104/103 plug is a full thread. The full thread plugs are duplicates of the half thread plugs in every other aspect, they both protrude the same amount into the combustion chamber.

NGK
stock--(TR4) 3754 (Heat Range - 4) [14mm, .708 Reach, 5/8" Hex]
1 step colder--(TR55) 3951 (5) [14mm, .708 Reach, 5/8" Hex]
2 step colder--(TR6) 4177 (6) [14mm, .708 Reach, 5/8" Hex]
-----(B8EFS) 1049 (8) [*recessed tip, racing plug]
-----(B9EFS) 1085 (9) [*recessed tip, racing plug]

TFS, Edelbrock, and AFR Heads:
[14mm, 3/4" Reach, 5/8" Hex, gasket seat]
AUTOLITE
1 step colder--3924 (4) [*recommended starting point]
2 step colder--3923 (3)
-----AR3933 (3) [*recessed tip, racing plug]
-----AR3932 (2) [*recessed tip, racing plug]
-----AR3931 (1) [*recessed tip, racing plug]

NGK
1 step colder--(FR5) 3686 (5) [*recommended starting point]
2 step colder--(BKR6EY) 3696 (6)
-----(R5671A-8) 4554 (8) [*recessed tip, racing plug]
-----(R5671A-9) 5238 (9) [*recessed tip, racing plug]
-----(R5671A-10) 5820 (10) [*recessed tip, racing plug]

MOTORCRAFT
1 step colder--AWSF22C
2 step colder--AWSF32C



4.6
MOTORCRAFT
stock--AWSF-32C (copper)
1 step colder--AWSF-22C (copper)
2 step colder--AWSFA-12C (copper)
AGSF-32C--FRPP heads

NGK
stock--TR-55/ 3951
1 step colder--TR-6 4177
1 step colder--NGK TR6
1 step colder--NGK BR6EF (Non-projected, resistor, v-groove copper)
2 step colder--NGK BR7EF (Non-projected, resistor, v-groove copper)
2 step colder--BP7EFS [PN - 3526] BR7EF [PN - 3346]
2.5 step colder--R5724-8 [PN - 7317]
3 step colder--R5724-9 [PN - 7891]
4 step colder--R5724-10 [PN - 7993]

AUTOLITE
stock--764
1 step colder--103
2 step colder--AR94
3 step colder--AR93
4 step colder--AR92

CHAMPION
YS-59C

DENSO
stock--IT16
1 step colder--IT20
2 step colder--IT22
3 step colder--IT24

[92coupe]

Nice chart Thanks Jeff!

[mustang8998]

Wonder if the ones listed under GT40, include "P"s?

I have a tread bookmarked, about GT40Ps. I'd have to look back at it, I guess.