[ByronRACE]

Generally speaking, large stroke engines are less tolerant of pump gasoline and more prone to breakage. The piston dwell is longer which will usually require either higher octane fuel or a lower compression engine. The piston speeds associated with long stroke engines are much higher at any given engine RPM which can lead to breakage unless the highest quality parts are used in the reciprocating assembly; be prepared to spend $2500 for a crank, $3-4K for a finished iron block, etc. And, lastly, if you do make a large cubic inch engine, make sure you have the right induction and exhaust for it. Throwing your typical 460 carb intake on top of an 800" stroker will yield typical 460 power. You need extremely special induction parts to optimize an engine of that size.

Personally, I think there are much more durable recipies for pump gas. Big bore, moderate stroke, and a power adder like a supercharger can easily exceed the power of an 800" stroker while keeping the piston speeds down, the dwell short, and the compression low...making it very pump gas friendly. This is exactly what I've done. I'm expecting 800-1000hp at the wheels out of 435 cubic inches using a factory ford block and crank; we just fired the beast a week ago. There's video in another thread.

Byron