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yup yup......
and why don't folks think that lightweight flywheel on the other side of crank that rotates without dampener is the root of the evil?! If one's main front and rear rod bearings are in good condition, the crankshaft should rotate steadily and harmonically; and as Nick said, "the reciprocating action of the pistons act as a dampaner as well." Therefore, how will a well balanced UD pulley cause the rod bearing borken unless one already has bad bearings.Put lightweight pulley aside and think about the connecting components after rear rod bearing. From there, you have flywheel, clutch set, tranny, driveshaft, rear axles, rear wheels weight of the car, and these are a lot of weights that crankshaft has to drive. Some people swap a lightweight flywheel right after rear bearing, and is there a harmonic balancer? Try to think in a simple general picture. You have a crankshaft, that is secure by strong rod bearings at both end to ensure smoothing roation and pistons act as dampening, driving the front end components, and rear components (and this is all it maily matters at the bottom end). As long as you have 2 good bearings and well balanced internal components to ensure smooth rotation driving force, you shall not have problems to connect accessories that will later cause bad bearings. **I feel like I have been repeating in the paragraphs :-( Oh well, it late and I am sick :-(** Erick : : long enough to have seen them all anyway. however i havent seen this question brought up. if you dont think it causes any problems than fine, than say i dont think either cause a problem, however some do believe it is the cause of problems, so i guess ill have to specify my questions a little more and direct them toward a non bias group. thanx though : detonation is evil.
: piston goes up. detonation (pre-ignition) happens. piston still wants to go up. but preignition wants the piston to go down. where do these opposing forces go? into the bearings. they feel the "fight" directly, no matter which force wins. : radial vibrocity due to an offset weight on the crank is minamal. folks forget that the reciprocating action of the pistons act as a dampaner as well.
: the bearings of a Z are designed to handle extreme forces (see above paragraph for an example). the very minor, in comparison, forces that the crank delivers due to a minor offset weight is so minamal, it should not be considered. : I orginally felt that I would play it safe, and not personally use a UDP, but after MUCH scientific research, I determined that the overall life of the engine is not negated due to a mildly unbalanced pulley. (ps, I think one of their sales pitches is that the pulleys are balanced).
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