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Old 03-18-2013, 09:51 PM   #48
Michael2000
 
Drives: .
Join Date: Jan 2013
Location: Southern California
Posts: 467
Quote:
Originally Posted by LOWDOWN View Post
The LT1 has been announced as making "450+ hp". A 5.3 = .85 of the 6.2's displacement. Simple (?!) math would say a 5.3 built/tuned similarly to the LT1 "should" make at least 385+...perhaps more...with undoubtedly better mpg. considering the coming trannies that will be available, combined with lighter Curb Weight and improved aero considerations.
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
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