Spark plugs

[csheff]

What plugs are u using for a 428 CJ motor? Old style or modern ones?

[Royce Peterson]

Original BRF32 Autolite plugs.

What plugs are u using for a 428 CJ motor? Old style or modern ones?

[66S285]

New

[gt350hr]

     BF32s . I still have a stockpile .

[Kent]

I use NGK and I´m happy with them

[pbf777]

     NGK #WR5     

     Scott.

[shelbydoug]

I still "tune" with champions. They are cheap. I can go through them without too much worry and their heat ranges are accurate.

Once I settle on the range, I use a better plug. BF32's never were quite right but are what the original engineering specified often. The issue was probably never the plug but a weak ignition system?


If you look at the current application charts, those have been replaced by BF42's which are still available.

NGK's I find to be a very high quality plug. It's heat ranges seem to be very accurate.

In the case of my 67 GT500, I never expected the original plug to be a BF42. Huh?

[csheff]

Thanks guys

[gt350hr]

    NGK WR5 is a good plug as well.