Honda NSR500V

[duc748pilot]

drool......

[motopix]

Originally Posted by ism409

The stingers are mearly silencers and have nothing to do with back pressure LOL!

What he said.

[soda7o]

wow high revs was wrong for once.. i guess he does not know everythign

[High_Revs_17]

Originally Posted by ism409

The stingers are mearly silencers and have nothing to do with back pressure LOL!

As the exhaust gases expand into the expansion chamber, they create a vacuum at the exhaust port. This vacuum pulls fuel/oil/air into the cylinder.

As the shock wave of the exhaust pulse hits the end of the expansion chamber, it echoes back, pushing any fuel/oil/air that got pulled through the exhaust port back into the cylinder.

By pulling extra fuel/oil/air through the cylinder and then pushing it back in, the expansion port has the effect of stuffing more fuel/oil/air into the cylinder on each stroke. This gives the engine extra power in the same way that a turbocharger does with out any moving parts.

Well said...of all people I should hope you would know this.

But regarding the pushing and pulling motion the expansion chamber causes I would assume that's a form of backpressure and that wouldn't be possible if the can's were the same size as the expansion chambers.

[carl_g]

Originally Posted by High_Revs_17

But regarding the pushing and pulling motion the expansion chamber causes I would assume that's a form of backpressure and that wouldn't be possible if the can's were the same size as the expansion chambers.

The pushing pulling motion in the expansion chamber is only caused by sound waves.