Another spark plug thread but little different...

[Compaq888]

I read on other car forums that by using a hotter spark plug gives a more complete burn. What do you guys think of this?

Right now I'm running BKR5E-11 which is a copper plug. Before I ran the stock plug which was platinum.

I'm thinking maybe if I switch to BKR4E-11 maybe I will get an even better burn. I don't even know if they got the 4 series plug. EDIT they do have the BKR4E-11 so what do you think???

SO far I have done to my ignition....
1) new distributor cap
2) new distributor rotor
3) new spark plugs which are copper
4) new spark plug wires

Now the only requirement is that my timing has to stay the same. My stock timing is 20 degrees. Now by switching to one sep hotter what are the pros and cons???