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Old 03-19-2013, 01:00 PM   #49
LOWDOWN
Downright Upright
 
Drives: Daily
Join Date: Apr 2009
Location: Cruisin'...
Posts: 4,145
Quote:
Originally Posted by Michael2000 View Post
It doesn't quite work that way. Horsepower is more determined by the bore size. Larger bores = larger valves = more air flow = more horsepower. Shorter strokes = higher rpm = more horsepower. Unfortunately, the 5.3L engine is just a 6.2L with a smaller bore.

Michael
...and fewer pumping losses...



BTW, a 3.99" bore and the 4.8's 3.268" stroke has you @ 5.3L...and that dimension easily supports 2.05/1.59 valves...with a greater redline than the longer-stroke 6.2. And VVT "adjusts" the torque...

Last edited by LOWDOWN; 03-19-2013 at 01:43 PM.
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