Gary_in_NJ wrote on 01/11/18 at 08:14:39:I love your love for torque, but as Dave pointed out, as stroke increases so does piston speed. Another issues include rod angularity, the acceleration/deceleration forces on the wrist pin, mid-stroke balance, primary and secondary shaking force.
I don't believe that the LS650 motor is under stroked. In fact, it has evolved from a 400cc engine where they increased stroke and bore to achieve a capacity of 650cc. There is opportunity (as proven) to increase the bore and compression ratio. The stoke is a more involved change and may not yield results that justify the efforts.
But by all means, have at it and keep us informed. Be prepared to go through several engines in the process of testing.
This isn't my first engine build or engine modification I could have stayed stuck on my ZX14 which made 194 horse with a pipe but no I decided to put a turbo and nitrous on it and makeover 660 horse I've Done big stroker kits and all kinds Motors drag cars street cars motorcycles even Raptors I've got 12 mm over Strokes in them I know what is all entailed in doing the motor