Help Understanding stroking/boring
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From: MCB Quantico, VA
Help Understanding stroking/boring Could someone please enlighten me on how "stroking" a motor works? As far as the different crank sizes and how they affect the ci?
same goes for boring as well. What happens in this process, etc.
same goes for boring as well. What happens in this process, etc.
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increasing the stroke increases the amount the piston will travel up and down (directly related to crank/rod size). Increasing the bore increasing the diameter of the piston/cylinder wall. Either of these will increase the volume of air per revolution of the engine.
increasing the stroke increases the amount the piston will travel up and down (directly related to crank/rod size). Increasing the bore increasing the diameter of the piston/cylinder wall. Either of these will increase the volume of air per revolution of the engine.
Thread Starter
TECH Enthusiast
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From: MCB Quantico, VA
all that math is a bit out of my league....is one more beneficial than the other? for example if i bought a new LS2 block, and wanted to stroke it, what would a 4.000" get me as compared to a 4.125" ?
A 4" stroke (larger crank) and a 4" bore (stock ls2 bore) yields a very common 402ci engine.
From what I've gathered a shorter stroke yields a higher safe rpm range.
That site actually has a calculator on it where you put number of cylinders, bore, and stroke to get your cubic inches. Just set the drop down menu next to where you enter the numbers to inches.
From what I've gathered a shorter stroke yields a higher safe rpm range.
That site actually has a calculator on it where you put number of cylinders, bore, and stroke to get your cubic inches. Just set the drop down menu next to where you enter the numbers to inches.
Big bore short stroke is for rpm and long stroke is for torque and low end. Although this mainly applies to older small/big block engines. Reciprocating mass and valvetrain weight also play a part in an engines ability to rev quickly and safely.
