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      07-20-2019, 06:35 PM   #47
jcolley
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Quote:
Originally Posted by 8500RPM View Post
Stroking and Boring a motor are 2 different ways to increase the displacement of an engine. Stroking works with the crank/rods to allow the piston to travel a further distance as the person above me stated. Boring makes the actual diameter of the cylinder larger to accommodate wider pistons.


For max block strength on a boosted application it's best to leave as much meat in the cylinder walls as possible. Drawback of stroking is the piston now moves much faster up and down and decreases rev limit.


Its best you stayed 4L if your end goal was high boost and 9K RPM
Dependent upon material choice, rod length choice and design, piston weight, etc, a stroker rotating assembly can easily be lighter than stock, especially the reciprocating mass if stock rod length isn't retained. This actually reduces the tensile stress on the rods at higher RPM.

Agreed on wall thickness though, not a fan of significantly increasing the bores on these motors since most of them get a lackluster tune after stroking anyway. That makes the additional .1 or .2L worthless.
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