hi compressions: wasDIY_EFI Digest V1 #258

[Todd Knighton]

John Faubion wrote:
> 
> Actually the big reason for multivalve chambers is more area is exposed
> around the valve to flow fuel. Two small valves have much more flow
> capacity than 1 large valve but is more expensive that manufacture.

That's also what Yamaha though, they went to 5 valves to get even more
flow.  They did pick up flow, but on the F1 motors the 4 valve engines
made more power still.  
Point is.  It's not all flow, but combustion chamber shape and flame
propogation as well.

Todd Knighton
Protomotive Engineering