lt5?
10-26-2005, 11:20 PM
#41
Originally Posted by 91Z28
They have aftermarket 4 valve heads for the 426 Hemi engine family. They are made by Covalt.
10-27-2005, 12:23 AM
#42
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Originally Posted by WhiteSSP
But that changes it from a hemispherical combustion chamber to a pent roof chamber. A hemi-head can only work with 2 valves, otherwise like he said the valves would all be going in different directions, and they would hit eachother without a huge bore to space them far enough apart, or tiny valves.
^^^ What he said. I do even believe the new hemi head while still being somewhat hemispherical actually is some what pent roof head design that was borrowed from porsche.
Matt
