new pushrods with head and cam swap?
06-30-2006, 07:14 PM
#2
Originally Posted by tweeder
I'm in the middle of putting 317 heads on my 5.3 and changing the cam to the 265 extreme from comp cams. Do I need different pushrods? I also changed the valve springs to the yellow GMPP ones.
06-30-2006, 07:19 PM
#3
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the valves are going to be very close to the side walls of your bore, 5.3 bore 3.77, 5.7 bore 3.9, and going from 62cc heads to 72cc heads going to put you around 8.5 to 8.8 compression, great for forced induction bad for N/A.
06-30-2006, 07:20 PM
#4
Originally Posted by v8
the valves are going to be very close to the side walls of your bore, 5.3 bore 3.77, 5.7 bore 3.9, and going from 62cc heads to 72cc heads going to put you around 8.5 to 8.8 compression, great for forced induction bad for N/A.