tooter's manifold adventure...

[baseballfan416]

I may be late to the show but...

I think there's still hp left on the table. Looks like the 108 whp is just about every bolt-on mod aside from the crank pulley, which is considered by many to be the best "bang for the buck."

[tooter]

Originally Posted by baseballfan416

I may be late to the show but...

I think there's still hp left on the table. Looks like the 108 whp is just about every bolt-on mod aside from the crank pulley, which is considered by many to be the best "bang for the buck."

I don't believe that the pluses outweigh the minuses in that regard, as I don't think it's a good idea to remove something from an engine that provides the useful purpose of absorbing crankshaft vibrations.

[baseballfan416]

Originally Posted by tooter

I don't believe that the pluses outweigh the minuses in that regard, as I don't think it's a good idea to remove something from an engine that provides the useful purpose of absorbing crankshaft vibrations.

If it's a horrible idea, why did Garm spend R&D building them?

[tooter]

Originally Posted by baseballfan416

If it's a horrible idea, why did Garm spend R&D building them?

I didn't say it's "horrible"... you said that. I only said that there are pluses and minuses for each pulley. Each Yaris owner chooses for themselves which part best meets their needs and wants.

When each cylinder chamber fires the force is transmitted through the piston down the connecting rod to the crankshaft. This force is not applied smoothly, but is a series of pushes.

So when the crankshaft rotates from the cylinder pulses, the rubber connecting ring between the center of the pulley and the outer section allows the center to alternately rotate momentarily faster and slower than inertial weight of the outer section which rotates more smoothly. This helps to absorb the crank vibrations to make the engine run smoother.

In high performance engines under racing conditions, this is not a consideration. So parts are engineered to meet high performance racing oriented priorities.