Quote:
Originally Posted by strider
Guys I have a question...
What is a 360 degree crank and a 180 degree crank?
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Good question.
Well, 360* Cranks were used in older machines. 360 degree cranks mean that the crankpin for all four pistons is in the same plane.
360* cranks provide a (1-0-1-0) Firing order, which smoothens the power delivery a bit, compared to a single cylinder. Watch this crank and you can imagine it in your mind:-->
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and a 180* Crank is very famous from those Litre Class Replicas (except 09' R1). Piston No. 1 & 4 are 180* apart from Pistons No. 2 & 3.
Generally, the pistons fire in (1,2,4,3) combination, but it changes from era to era & machines to machines.
The image below shows a 180* Crankshaft:-->
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Degree of the Crankshaft, is decided on basis of rotation between 2 firings.
Remember, 09 R1 does NOT belong to this category as it has UNEVEN Firing order (Firing Degrees are 270-180-90-180)
Source:
StateMaster - Encyclopedia: Honda Magna and various other sites through google...