What does it all mean? I understand heat ranges, and the meaning of R42-R46.

What I don't understand is all the letter suffixes. IE. R45TS (which I've been using), R45SX, R45ABC, R45SZ, etc. What do they all mean, and which ones do I have the option of using?

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"American made baby. 100% American iron. The muscle among the masses. My hero. Yep, you can take your ergonomically designed, space age, computer controlled, 4 door, cup holding map lighted split double wishbone split fold down retractable cargo covered moon roof piece of transportation and keep it. For I have felt the thunder. And I know the difference!"
JSP Motorsports
ICON Motorsports

 

Oh yeah..Also, is there a site that lists all the interchange info between brands? So I can figure out which plugs from brands other than Delco I might use?

 

Go here:
http://www.acdelco.com/html/pi_plugs_ident.htm

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Rob
'86 TA 305 TPI
Gutted MAF, Ported Plenum
TB Bypass, Home made Cold Air Intake,
Edelbrock T.E.S.
48psi regulator, (Nickel method)

 

Here goes:

R45TS

R = Resistor

4 = Thread Size (14mm)

5 = Heat Range (0-9)

C = Copper Core
E = Special Design Electrode, Extended Tip
L = Long Reach
M = Special Design Electrode
S = Extended Tip
T = Tapered Seat Shell Design
X = Wide Gap
Z = Special Gap
6 = 0.060" gap
8 = 0.080" gap

Don't know about interchangeability, but that's about everything about Delco plugs. Hope this helps.

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1990 IROC 350
Mods: Too busy trying to make it run right to mod it.
Airfoil, Dynomax cat-back, MSD coil, 180 t-stat, Bald Eagle tires,
Hypertech fan switch, Accel 23# injectors, Holley AFPR, ported plenum,
Ported Daytona Yellow stock base, Moroso valve covers, other stuff,
Ruger P95DC, hot wife, new oil filter, thick rubber floormats, no cats.
18.0 @ 85MPH since I'm one big-a$$ MF
"It's better to have and not need than to need and not have."

 

Damn, R.O.B. . Beat me to the punch and really nice link too!