balance shafts or no balance shafts

[1990AWD]

Its seems as though a lot of people are removing their balance shafts and/or oil squirters. Why is this? And why do people also use n/t blocks on turbo cars? I realize the n/t block would be higher compression but what other advantages are there?

 

[dsm-onster]

Sure it is. It's stored as potential energy. Suddenly vaporize your bed. . .

But if your pillow were suspended by a single stage mini-rocket for those eight hours, then you're most definately expending energy by the rocket to keep your pillow and head stationary. Or, I still remain very tired when I press my pillow and head to the wall to go to sleep.

It's similar to wave mechanics I suppose. Look at light wave interference. Where the waves are 180* out of phase, there is no light. The energy was spent by both waves to cancel each other. Same with bshafts vibrating 180* out of phase with the motor. Motor wants to move one way, the b-shaft MOVES another. Time, distance, force.

 

[DSM1G90]

Motor wants to move one way, the b-shaft MOVES another

Yet, with both BS shafts spinning in opposite directions - front BS spinning clockwise and the oil BS spinning anti-clockwise more or less doing a "push and pull" situation - this, would then work with each paired piston action?

Some old Yamaha motorcycles, esp their big twins, had chain driven balancers in their motors.

Also interesting is the BS placement in the block itself - not straight across from the crank but the front being almost 45* higher from level.

Which brings on the other side of this spectrum: Other four bangers, like the 420A - how do they get away from not having BS shafts-what's their little secret?

 

[Calan]

For the last eight hours my head was forced down on a pillow by gravity.

Well technically speaking... your head was falling toward the pillow due to distortion in the fabric of space-time, until the the atoms in the outer layers of your scalp and hair came to rest a certain distance from the atoms of the outer layer of the pillow. In fact, your head never really interacted with the matter in the pillow at all; it was suspended a tiny distance above it due to opposite electromagnetic forces at the atomic level.

I'm no quantum physicist, but I also stayed at a Holiday Inn Express!

 

[TunaTalon]

dsm-onster,
I just never considered "wants to move" in the math. After reading your post I grabbed the bottom of my chair and pulled up. I wanted it to come up but my butt wanted it to stay down. No motion so no horsepower; just lots of wasted energy.

Now when my wife wants to go one way and I want to go the other way there must be some power involved because we always seem to move her way.

For members who don't want to read all of the way through this thread:

Balance shafts are a parasitic power loss from:
Friction in the Balance shaft bearings.
Losses in the belt from friction and flexing.
Angular momentum of the shafts.
Air resistance from rotating those paddles 2X RPM.
Losses from flinging oil around.

At least one contrarian member (me) believes that the balance shafts prevent vibrations and so there must be some savings from the power that is used to make the car shake without the balance shafts. There is one Wiseman (who is absolutely trustworthy in everything else) who believes that no power is saved from stopping the vibrations.

There is no dispute that with the balance shaft belt in a trash can it cannot break and take out the timing belt. There is no dispute that when pistons compete with valves for the same space the owner loses.

Without Balance Shafts the car shakes more with stiffer motor mounts.

Whether the vibration from BS deletion is a good thing, bad thing, or not noticeable is strictly a personal decision. Your mileage may vary.

 

[dsm-onster]

Maurice, you're hilarious! I can picture you sitting in a chair typing; then randomly pulling up on it with a grunt and perhaps a little more; then back to more typing.

In the case of my wife, there's usually alot of energy spent after moving her away. So sometimes I just naturally go to the lowest state of energy .

 

[Sumopower87]

No balance shafts for my Evo 3...yay

 

[ratatack]

no balance shafts for me neither