If he's talking about crank hp, its possible but not likely. 425 is about what KenB would be seeing at the crank with his 368rwhp. That is "maxed out" though. It comes down to volumetric effeciency. a 281 cubic inch engine at 100% ve will pump 281 cubic inches of air every two revolutions. It takes one hell of an engine to reach 100% ve. You can calculate ve required to produce a cretain hp with this formula.
REQUIRED VE = ( 9411 x HP x BSFC ) / (DISPLACEMENT x RPM)
1.03 = ( 9411 x 425 x .45 ) / (281 x 6200) or 103% ve
Of course you can allways try to spin it faster, but this was base on Kenb's max 368hp at 6200rpm
REQUIRED VE = ( 9411 x HP x BSFC ) / (DISPLACEMENT x RPM)
1.03 = ( 9411 x 425 x .45 ) / (281 x 6200) or 103% ve
Of course you can allways try to spin it faster, but this was base on Kenb's max 368hp at 6200rpm