B21 engine - which NGK spark plug?

[Just Allan]

HI folks... What NGK spark plug should be used in a B21 engine with
K-Jet Fuel Injection... WSBP6ES or WSBPR6ES?

Allan

 

[Just Allan]

Anyone know which NGK spark plug should be used?

Car has K-Jet injection and a B21 engine.

WSBP6ES or WSBPR6ES?

Allan

 

[Alex Zepeda]

Anyone know which NGK spark plug should be used?

Car has K-Jet injection and a B21 engine.

WSBP6ES or WSBPR6ES?

Either should be fine. Apparently the resistor plugs make more of a
difference for the EFI cars. BPR6ES is a resistor plug, BP6ES is not.

- alex

 

[Stuart Gray]

Either should be fine. Apparently the resistor plugs make more of a
difference for the EFI cars. BPR6ES is a resistor plug, BP6ES is not.

- alex

I've often wondered what the difference is; is it that the "R" plug causes
less electrical noise in the engine bay or what? All I know for sure is that
they are the same heat rating and the "R" one is more expensive. If anyone
knows the answer, I would be glad to know myself.

Stuart