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-   -   Differences between 6.1 and 6.4 Hemi (http://www.jeepgarage.org/f97/differences-between-6-1-and-6-4-hemi-28500.html)

QuickOne 09-13-2011 07:45 PM

Differences between 6.1 and 6.4 Hemi
 
#1 Both Valves are 1.5 MM larger than 6.1
#2 Hollow Valve Stems
#3 Exhaust valve Sodium filled to aid in cooling
#4 Composite made active intake vs Aluminum
#5 Varialbe Exhaust valves for 13% increased economy
#6 MDS up to speeds of 120 mph.
#7 Variable Cam timing
#8 Increase oil flow
#9 Increased Compression to 10.9
#10 Revised casting of engine



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