| FAQ |
| Members List |
| Social Groups |
| Calendar |
| Search |
| Today's Posts |
|
#141
11-09-2005, 12:08 AM
|
||||
|
||||
The benefits of the hemi are pretty much undisputable. The only drawback is the cost of manufacture. They are considerably more expensive to build than the typical wedge engine, mostly due to the double rocker shafts. Interestingly, Chrysler also built a related but less expensive "Polyshperical" V-8 with a single rocker shaft. The Poly engines had a valve arrangement very similar to the Big Block Chevy. In the early 1970s, Chrysler tried a lower-cost version of the Hemi with ball-stud rockers instead of shafts. It was ultimately rejected, as the cost of manufacture was still too great and the need for such an engine was on the wane.
With a 4-valve per cylinder layout, in order to fit the valves, the combustion chamber is altered somewhat, adopting a pent-roof chamber layout. Hope this helps.
__________________
Founding Editor-in-Chief, Poncho Perfection 10/1/15-12/31/24) Contributing Editor: Collectible Automobile (1999- ) Author: "Grand Prix: Pontiac's Luxury Performance Car" (4/27/07) "How to Restore Your Pontiac GTO" (7/15/2012)) "Pontiac Concept and Show Cars, 1939-1980" (3/25/16) "Pontiac Performance 1960-1974: The Era of the Super Duty, H.O., & Ram Air Drag & Muscle Cars” (10/15/24) "Leave the gun, take the cannoli." |
|
#142
11-09-2005, 12:12 PM
|
||||
|
||||
|
Don, do you know Eric Dahlquist, the writer?
Is he still alive?
__________________
John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! W.E.C moment "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
| Reply |
|
|
The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.
Linear Mode
