06-12-2008, 07:35 AM
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CC Member
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Join Date: Sep 2002
Location: Hickory,
NC
Cobra Make, Engine: ERA 427SC w/427so, ERA GT #2002
Posts: 1,106
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Not Ranked
Check out the March '08 issue of HRM. They provide a fair amount of info on the 331 Boss crate engine with comparative dyno figures for GM and Chrysler engines. Bore/stroke as tested is 4.125/3.100, which makes for a high-revving small block. One red flag I noted was the compression ratio. The 12:1 CR moves this engine out of the pump-gas range. I'd like to see figures on a 10.5:1 engine.
The 331 in my GT40 was dynoed at 385 hp on pump gas. Block is the old SVO with dimensions similar to the Boss. Crower crank and rods are used as are Dart heads.
I really like the Aussie CHI Funnelweb intake used on the Boss crate piece. I think this manifold is available from World Products.
__________________
Tom
"If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough HORSEPOWER." Mark Donohue
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