Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Combustion chamber shapes
View Single Post
  #4 (permalink)  
Old 10-14-2012, 11:52 PM
F-BIRD'88's Avatar
F-BIRD'88 F-BIRD'88 is offline
Yada Yada Yada
Last photo:
Join Date: Oct 2005
Location: Ontario, Canada
Posts: 9,211
Wiki Edits: 0

Thanks: 5
Thanked 389 Times in 383 Posts
Most combustion chambers on american V8's are wedge style.

Hemi good port to valve angle. big valves, central spark plug(s), valves open away from cylinder walls no shrouding around valves.
Disadvantage large surface to volume ratio. No effective quench (true hemi)
High compression ratio requires a big piston dome. High surface to volume ratio. Convoluted combuston
chamber shape with big dome. More expensive to manufacture Complicated valve train, rocker system. Most Hemi's are not a true Hemi head . But a modified hemi Semi hemi with quench like the new chrysler Hemi.
engine of present.
Reply With Quote