OT- Chevy Big Blocks

[oab_au]

[QUOTE]Originally posted by $VX
[B].

. CHRYSLER was one of the first to produce an consumer automobile engine with a hemispherical head (hemispherical heads were first found to produce more power during WW2 in airplanes.

> There are probably about 20 car and bike makers around the world that used the hemispherical combustion chamber before WW2 <


The other reason the hemi was so important was that the valves are actually ANGLED into the head, which is STILL pretty damn good compared to modern engines.


> The hemispherical combustion chamber is not used any more. It's dirty, inefficient and prone to detonation. The four valve pent sided chamber sounded it's demise. <

Gota tell it like it is Cash.
Harvey.