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BALANCER OR NO BALANCER ?

  • NO stret driving is worse

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Discussion Starter #1
Ok so i have a roots with a 14mm belt , all off the car and going with N/A set up ...QUESTION is : I used a ext. weight hub and no balancer with the roots ..........going N/A i'm gunna use the same set up ( no balancer) yes no maybe ??
Probably won't race the car .
yes it was balanced and is a ext. balanced motor.
tanxz
 

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LOVING LIFE
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NO.. The belt absorbs the harmonics. I would guess its a dual keyway crank? Its odd that its a EXT balance was it stock stuff??
And I cant remember ever seeing a HUB with wieghts on it. Are you sure its not a INTERNAL balance engine..
Either way get a balancer for it.
 

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Yellowbullet Overlord
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Blowers will act like a harmonic balancer with the belt drive. Once you remove that you should put a balancer on it.

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I don't have a technical answer, but NO I would not do that. Why not just put a balancer on it and not worry about it. They are cheap!
 

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Blowers will act like a harmonic balancer with the belt drive. Once you remove that you should put a balancer on it.

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X2
 

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where does this info that the belt does the work of a damper come from? does anyone know? does anyone have proof on this or is it passes down from the 50's?

has anyone ever used the equipment that test the twist in a crankshaft on thier blower motors?

most blower motors that i see have aluminum blocks and aluminum rods that greatly help and they always hurt the number one throw and bearings always flake.

you need a damper on every engine.

its your engine is it worth taking someones word that doesnt have proof that you will be OK. and why would you want to roll the dice?
 

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Yellowbullet Overlord
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John, do you guys offer a damper that will work with a standard 8/14 MM set up with crank support?

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Discussion Starter #10
NO.. The belt absorbs the harmonics. I would guess its a dual keyway crank? YES Its odd that its a EXT balance YES was it stock stuff NO CROWER, OLIVER , DIAMOND PARTS ??
And I cant remember ever seeing a HUB with wieghts on it. Are you sure its not a INTERNAL balance engine.. YUP FLYWHEEL IS WEIGHTED !
Either way get a balancer for it.
BDS has the weight ! + i'll be running 2 belts on it ....i hope.....:(
 

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Discussion Starter #11
I don't have a technical answer, but NO I would not do that. Why not just put a balancer on it and not worry about it. They are cheap!
have one for another motor (ATI) but the space-ing is gunna be another project to solve , ggrrrrrrrrrrr:smt093
 

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LOVING LIFE
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where does this info that the belt does the work of a damper come from? does anyone know? does anyone have proof on this or is it passes down from the 50's?

has anyone ever used the equipment that test the twist in a crankshaft on thier blower motors?

most blower motors that i see have aluminum blocks and aluminum rods that greatly help and they always hurt the number one throw and bearings always flake.

you need a damper on every engine.

its your engine is it worth taking someones word that doesnt have proof that you will be OK. and why would you want to roll the dice?

well my bearings dont flake, and the reason the number 1 throw gets hurt by SOME blower motors is thats where the stress is. All the stress from turning the blower is put on the snout of the crank.


Mondello does all my machine work and I use good bearings and have a good tune up. And on the blown stuff we dont use a balancer because the belt is absorbing any harmonics that might be there. How does your Dampner differ in its ability, where does the harmonics from the engine go once it gets to your dampner?

BTW. We only run ATI balancers on all of our motors, EXCEPT our blown stuff.

I hope to learn something here.
 

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RED ROCKET
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when you put a balancer on and run blower it sticks way out...we have done it with a 671 ..a 1471 would really stress the crank...i can see a rubber belt absorbing vibration..i wonder if the polychain belt absorb as much.
 

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our damper face is OEM location for the pulley mounting surface and we also have a damper with the chrysler 6 bolt on the 2.81 bolt circle so you wont have the blower pulley stick out.

a damper is an inertia weight that is surounded by rubber o-rings. when the crank acts on the damper the inertia weight (riding on the o-ringd) will counter the cranks action. a belt cant do this since it doesnt have any mass to counter the action.
if the belt was the answer then no motor would need a damper since ALL motors have one or more belts on them right? what makes the blower belt different than a power sterring belt? if the blower belt worked on harmonics then the aluminum pullies wouldnt have chatter wear in the teeth.
on our website we go into this in detail but i'm just trying to understand the logic.
i understand that in the 50s when a stock damper would crack you needed something else and that most blower motors never made it more that a couple of passes till they pulled another one from a junk yard, but this isnt the 50s any more
think of it this way. a drum kit has a symbol and when you hit it it will ring now if you hold the symbol it will just thud, this iss like a damper the o-rings are your fingers and the symbol is the inertia weight and the stick is the combustion. if you hang rubber from the symbol and hit it it will still ring, this is like having the belt only.
 

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I have run blower motors for years..... Never ran a balancer, dont know anyone who runs a balancer.... The belt and blower absorb the harmonics...


Keep the blower on it.....
 

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From the poll, you should just kick back and watch porn . . . . LOL
 
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