Good article on basic stroker theory

Moper,
This is what I said without getting into detail on "another opinion question" thread pg. 3 last reply. This is also why I say that the 360 will make as much power as the stroker counterparts, the rod ratio for the 360 is 1.71. Also why I said that the heads would have to change also, thus the longer strokes require bigger runners and valves with shorter rods due to the suction difference. The suction may be harder sooner but is less later where the longer rod has a more efficent pull through out the cycle. Which is why the long rod engine needs less port volume than the short rod engine as this artical explains.
This is also why the long rod engine will make similar torque as the short rod engine with a longer stroke, due to the position of the crank when the cylinder fires. The short rod engines crank pin will be closer to TDC than that of the long rod engine, so the long rod engines crank pin will be moving away from TDC when the cylinder fires. Thus when the engine fires, that the force that is put to the crank pin in the long rod engine will have more pressure on it than that of the short rod engine due to the position of the piston in the cylinder, sitting higher in the power cycle or combustion process than that of the short rod engine.
Good artical! This will help alot of people understand the basic differences that the 2 different engine combos have.
My point exactly, is why spend the money unless you just have to have a stroker engine, when the parts that you buy can make the difference. Rod ratios, bore to stroke ratios, and head configurations are very important and MUST BE MATCHED or the results won't be there regardless of who builds the engines.
With less stress on the rods and cranks and keeping the rpms down to 6200-6400 rpms good factory parts are very hard to beat. As I said before, the engineers get paid to do this, so use what they give you and make it better. As they have the toys at there disposial and we dont. A lot of the knowledge thats out there today was done 10-15 years ago that is being used today as new ideas and sales piches.
Sorry for being so winded, but this artical says what I've been saying in laymans terms.



BJR Racing