next plug heat range?
 

Need a hotter one than a autolite 3924...
any ideas?

Thanks...

3926's
 

I am using a autolite 3926 in number 5 for testing purposes.

I have also noticed my car stays unusually cold. That is it never gets hotter than the second tick off the bottom. I guess that corresponds to about 170-ish. I think I have a 180 t-stat in there , but I can't be sure.

I know that is too cold. Apparently, five-oh's like to run in the 190's for optimum performance. So my latest theory is that my car never heats up, so the computer keeps dumping fuel (i.e rich) to warm it up. But the only problem is, number 5 is the only bad plug that fouls after a couple of hours. (with the colder 3924's)