ok i am building a 454 stroker i would just like the estimated hp and tq of the engine here are the specs the ingine is bored .060 over and the pistons are kb 25.5 dome pistons with a compression ratio of 12.1 to 1 the heads are a ported ovel port head ad the cam is a .560 / .573 lift and 240 int./246 exh. at .050 and a 112 Lobe Separation plus i have 1.8 roller rockers the intake is a weind intake good from 1500 rpm to 6500 rpm so it matches the cam also have hooker long tube headers

 

Which oval port heads?

Are you sure about that compression ratio? What did you intend to burn for fuel?

 

i am sure about the compression ratio and i will be running 104 octain and the number on the heads read 336781

 

anyone have an idea

 

Well here`s what my calculations come up with...I`m assuming by stroking you mean a 1/4 stroke...

cylinder bore size 4.310
piston stroke length 4.250
head gasket bore 4.375
gasket thickness .039
combustion chamber cc 119.
piston dome CC 25.5
piston / deck clearance .016

calculated engine compression 10.502183258123432:1
total displacement volume 106.93282925581089 CC

to get a true 12:1 you will need a 40cc dome. So with a 496 cubic inch with a pump gas friendly 10.5 to 1 and a small hyd flat tappet, 1 7/8 headers, dual plane intake and oval port heads you will have quite the torque monster, I would guess it to have around 575-600 ft lbs of torque and probably 500 HP or so at a lower rpm say somewhere around 3500-4000, that is one hell of a pump gas STREET motor!