Re: Mike's 53 Clipper

Posted by Tobs On 2017/10/9 6:04:12

In the spirit of experimentation, I re-gapped my spark plugs (AC-R45) from the factory spec of 0.028" to 0.031". (My spark plug wire gauges are metric, so I went from 0.7mm to 0.8mm)
My car is 12volt with pertronix and their 1.5 ohm coil and no ballast resistor...In the first day of driving I cannot say I noticed any difference. Nothing seat of pants, and no difference in my manifold vacuum gauge. The change is pretty small to negligible.
In the pertronix instructions, they write that with the coil, gap can be increased +0.010" which I may try out, but am not sure. That would be the widest I would ever go, but am tending to stay at or near the stock specification.
I didn't take any pictures, but all plugs looked very clean, no traces of running rich or burning oil at all.
Just thought I would share my experience. I wonder if anybody else has experience with changing gaps on the flathead engine. Looking online at what flathead ford people say, staying at the stock spec is the way to go. I'm not trying to convert anybody that wants to run points. comments?