chevy 350 spark plug numbers?

Anyone have a list of spark plug numbers for chevy 350 engines and what they were put into?it's a longshot i know but worth a go.........Marq

 

Huh...?

 

yeah, Huh

you mean like an ac delco part number for a 350 chev with HEI would be an R45TS

points i run an R43TS's

 

yup r43ts should be like a 1.20 a piece

 

i use R45T but the "T" is a tapered seat and some of them used R45 (flat seat).

 

yup, you need to know which heads you have, as the early ones take the washer type plugs.

The early 350s take R44 or R43, then starting in 1971 it's R44T or R44ts or R45Ts. Usually R45TS works fine. Set the gap at .035 for regular ignition, or .045 for HEI. The T means tapered seat, the S means projected nose.

These are AC numbers.

 

yeah i have the small tapered seat type plug but i need to go a bit hotter than i'm running at the moment....marq

 

i have champion rv17yc i need hotter any suggestions?..Marq

 

hmmmm...rv17yc is an r46ts, which is hot as you should ever need. Why do you think they need to be hotter?

 

well from cold the engine dont burn off the fuel as well as when it's hot so a hotter plug would help.Not much hotter mind just one up.......marq

 

You might want to play with the carb some more before trying to solve the problem with different spark plugs. The heat range should be selected based on how the engine runs under load when it's warmed up....not when it's idling or still cold.