Originally Posted by 496CHEVY3100
Back to the original question Why was it called an even fire not what size was it or timing ,I will try to print this
The question was why was it called an "even fire", the reason is because the previous one was called an "odd fire". The reason being it was a V8 with two cyl cut off leaving a three throw crank and a distributor with an odd spaced cam. It was an "odd fire" being it skipped two cyl as the distributor rotated making a not so smooth running motor. Below is a diagram of the distributor cap showing the even fire V6, Odd fire V6 and V8.
On the V6 being an aluminium 215 with two cyl cut off, I am sorry, it was of that design, just as the 300 Buick motor was basically the same, they used the same water pumps and valve train for instance so I guess it was more the 300 with two cyl cut off. They did have a 340 same basic design I think with only the bore being different than the 300 so maybe the six was basically the 300 but with slightly larger bore?