Quote:
Originally Posted by LOWDOWN
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.
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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