whats the difference of makin an engine a stroker engine O_o

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87lostsoul

Not-quite-so-new-guy
Oct 1, 2011
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what makes an engine a stroker engine? or what do you have to do to make it a stroker engine?
any inputs are very well appreciated!
 
Re: whats the difference of makin an engine a stroker engine

stroking a motor involved getting a crank shaft that makes the pistons go up and down a longer distance. say you have engine A, and the distance that the piston travels is 3.00 inches from top dead center(tdc) to bottom dead center(bdc). now say i have engine B and its stroke is 3.75 inched from tdc to bdc. you can take the crank from engine B and put in engine A and make the stroke longer. this will increase HP and TQ, but the engine will not want to rev very high. my motor for example is the same as a 283 sbc, but it has the stroke of the 327. so it makes a lil more hp compaired to the stock 283. no just so ya know the stroke isnt the same as boring the motor whitch is making the cylinders the pistons sit in a larger diameter. now if you have a stock 350 sbc and you bore it .030 over and install a SBC 400 crank you get a 383. i suggest you buy this book and read it, it teaches alot. i learned a crap load from this book.
http://www.amazon.com/Build-Performance ... 1884089348
 
Re: whats the difference of makin an engine a stroker engine

Don't forget about clearancing the block to accept the longer stroke.
 
Re: whats the difference of makin an engine a stroker engine

yeah theres a lot that goes into engines, get that book and youll see what i mean.
 
Re: whats the difference of makin an engine a stroker engine

My understanding is that air/fuel flow increases HP whether it be from better heads intake & carb or exhaust manifold and back or from longer duration & or higher lift camshaft ie increased efficiencies. Any HP increase from displacement or stroke is incidental. Displacement gain will directly increase torque and more stroke at the same displacement will bring that in at a lower often more use-able rpm. Longer stroke engines can still rev to higher rpms but usually don't have to in order to make the same power and when they do they have greater piston speed at the same rpm so lighter weight stronger materials and better balance become important at an even lower rpm. More than the OP wanted but sort of trying to correct a common misconception.
 
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