Stroker Kit - Subaru WRX Forum
 
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post #1 of 6 Old 06-14-2003, 08:13 PM Thread Starter
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Question Stroker Kit

What exactly is a stroker kit?

I was browsing vivid racing's page, and came across stroker kits.
Don't exactly know what it is, or what it does, but hopefully you guys do!

Thanks!
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post #2 of 6 Old 06-14-2003, 10:56 PM
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Huh... huh... you said stroker....

Anyways, it takes a 2.0 liter motor and makes it either 2.2L or 2.5L, depending on the kit. It does this by increasing the amount that the piston travels via a new crankshaft and connecting rods, therefore increasing displacement.
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post #3 of 6 Old 06-14-2003, 11:29 PM
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no replacement for displacement, beavis! usually has a slightly larger piston, too. not too mention the LARGE amounts of machining and assembly time.....this is what you do AFTER you melt #3 piston cause you ran it too lean. hehehe....more powaaa! needed only in high HP applications, which means Koby will probly be doing it soon.....;-)
JOEY
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post #4 of 6 Old 06-15-2003, 09:16 AM Thread Starter
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Thanks! Thats kinda what I figured, but needed a better idea!
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post #5 of 6 Old 06-16-2003, 11:59 PM
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stroke

As mentioned, the distance the pistons move increase via a different crank, and/or rods. You then also have to modify the cylinder head and/or gasket for the right "squish" (compression ratio) of the air/fuel mixture. Upside is inceased displacement and more torque.

Downside is cost, plus piston speed. You "might" have to limit engine RPM with a stroker if piston speed is "too fast" for reliability. Oil system and cooling system makes a difference.

As an example, Harley motorcyles can be pumped up via larger pistons, or increased stroke, or both. They are a good place to research the effects of larger displacement thru piston size or stroke effects, as they have been at it many years.
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post #6 of 6 Old 01-29-2006, 11:59 PM
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define high HP applications please.
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