How Much Hp?
I have a 400 small block bored 40 over (408). It has a cast 400 crank 5.7 rods, 30cc dish top KB silvolite pistons,.470 lift 224 duration com magnum cam,hyd. lifters RPM performer daul plane intake, vortec heads ported on the exhaust, and 670 holley street avenger carb. It has around 9.5 to 1 compression. I have been told I'm close to 400 hp and I've been told just over 300. I have not had it dynoed. I'm just looking for a good close estimate and a way to calculate without computer dyno.