Cutting out up top

[Anonymous_User]

Took the Z out for a bit today. About 60* and wanted to drop the T-tops for a bit. It has taken to kind of cutting out up top, like above 4500 rpm and at 20psi. I checked over some things and the basics look OK, ignition timing at 10*, fuel pressure 55psi, cam timing right.

I thought maybe a plug might cause it? What do you think?

Oh, running autolite 63 or 64. What should I gap them at?

[puppet]

.025 - .027" should work for you.
What temperture t-stat are you using? If plugs are full of carbon think about swapping in the 195* t-stat.

[Dave]

Yup sounds like too big of a gap, distorting the spark. RN12YC's have always been good for me.