So how many fully built there DE motors,and didnt balanced the whole rotating assembl
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i don't even know where to begin....to all the "unbalanced" guy's......do you notice some harmonics around 3500 rpm?.....that's your motor rattling to death.the more power you make,the more you will notice.(lightened flywheel guy's testify here)
matching internal weights is the first step to balancing,next is balancing the crank to that weight.(with the flywheel and balancer you will use on that very same motor,otherwise you just wasted your time)
matching internal weights is the first step to balancing,next is balancing the crank to that weight.(with the flywheel and balancer you will use on that very same motor,otherwise you just wasted your time)
ok what about ppl that didnt do the flywheel clutch and crank pulley ???
are they safe ?
can they sleep ?
or they will end up with a piston coming from the engine, setting in the passenger seat, and after that he will use the piston as an ashtray !!!!
are they safe ?
can they sleep ?
or they will end up with a piston coming from the engine, setting in the passenger seat, and after that he will use the piston as an ashtray !!!!
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I forgot theres alot of people who just dont know.I used my stock crank and had pistons that balanced between the 6 within two grams of each other.The Eagle rods where balanced within two grams wait it might of been gram,BUT ANYWHO.I was told it would blow up(WHICH I KNEW WAS FALSE),but did some looking around just incase if I didnt rebalance the whole ROTATING assemble. crank,rods,pistons,flywheel.The crank pully isnt really a concern since it isnt REALLY balanced.NOW some other cars is differant with the crank pully.
I forgot theres alot of people who just dont know.I used my stock crank and had pistons that balanced between the 6 within two grams of each other.The Eagle rods where balanced within two grams wait it might of been gram,BUT ANYWHO.I was told it would blow up(WHICH I KNEW WAS FALSE),but did some looking around just incase if I didnt rebalance the whole ROTATING assemble. crank,rods,pistons,flywheel.The crank pully isnt really a concern since it isnt REALLY balanced.NOW some other cars is differant with the crank pully.
Last edited by failsafe306; Aug 21, 2009 at 06:29 PM.
If everything is very, very close in weight relative to each other, then you're probably fine.
But it's not really the weight itself more than the weights relative to each other. Pick two of the lightest piston and rods together and two of the heaviest piston and rod and you might have inbalance inbetween those to that might not be favorable.
I don't think it would be THAT hard to mix/match piston and rod combos and try to get the whole set's weights as close as you can relative to each other. I mean w/o resorting to grinding grams of weight off of stuff.
But it's not really the weight itself more than the weights relative to each other. Pick two of the lightest piston and rods together and two of the heaviest piston and rod and you might have inbalance inbetween those to that might not be favorable.
I don't think it would be THAT hard to mix/match piston and rod combos and try to get the whole set's weights as close as you can relative to each other. I mean w/o resorting to grinding grams of weight off of stuff.
I am just waiting for Go-Fast to post!
Last edited by Motormouth; Aug 21, 2009 at 08:42 PM.
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having an unbalanced motor does not gaurantee that it will explode,will it make less power than a comparable balanced motor?......yes.will it have weird harmonics in the middle of the rpm band?......yes.will it wear prematurely?......yes.if you are doubling the rated hp (or more) your a knucklehead if you don't balance the crank .stock or stockish is not such a big deal due to the fact components are designed beyond their intended application (they expect the knuckleheads).
so if you don't mind vibration,low power and shorter engine life, matching the crank to recip weight is not important.
these details are what makes the difference between a motor and a great motor.when matching weight there are many factors taken into account,have you considered the weight of the oil that lays on the piston,rings,and rods? (especially considering this is an oil squirter motor)
so if you don't mind vibration,low power and shorter engine life, matching the crank to recip weight is not important.
these details are what makes the difference between a motor and a great motor.when matching weight there are many factors taken into account,have you considered the weight of the oil that lays on the piston,rings,and rods? (especially considering this is an oil squirter motor)
Nah I dont think so cause
He knew I built my motor.I think what it was is the owner is abit out of touch(NOT FAR) but enough that.THE better way was to have it balanced for longgevity and less probloms.I just didnt know anyone near by to do a complete rotating balance job.I knew it would be fine with balanced rods and pistons for many miles.SO his mechanic/owner blah blah blah I think someone was looking at my best interest.Its all good tho.
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