spark plug gap

bassdog · March 2, 2002

Ok,

Who uses RapidFire plugs and do you leave them on the preset .045 gap that is recommended? Should I stay with the good ol .035 gap with these plugs?

Thanks

95Yukon · March 3, 2002

I use them with .050 gap, but only because I have an MSD. If you are using them with stock ignition, I would stick with the recommended gap size. If I remember correctly, they were actually about .038 out of the box for the "#1" which my truck uses.

CityTruck · March 11, 2002

On my 95 (5.7) I used them with the pre-set gap. Best plugs I've ever used.

CMNTMXR81 · March 11, 2002

That .045 recommended gap on those RapidFires is a happy medium. Keep in mind, that particular plug may be used in varying applications throughout GM's lineup. With that said, I'd stick with what is preferrable on the trucks emission sticker. But if you feel you want to make it a happy medium, split the difference and do .040.

Be thankful, most the newer ones run .060 stock!!