1. ported CONVENTIONAL
Called conventional, because this ported motors common in civilian (read: rabble). Usually applied in a motorcycle in general. This ported only have 1 advantages, namely: to make fuel economy, because of its curved and narrow hollow, so that the fuel flow is slow and little.
Arc called because its shape is like a semi-circular arched bow. The usefulness of this arch to produce gasoline vapors swirl effect in the combustion chamber. Maybe if I may say, gasoline vapors such as "mixed" in the combustion chamber. Functions that the volume of gasoline vapor in the combustion chamber to be more "solid", so that when the fire was sparked off by the spark plug more kick then the kick, so the torque is more "bite". Porting arc models usually applied to sport touring bike like the Yamaha Scorpio, Honda Tiger, Bajaj Pulsar, New Megapro, and his friends.
Porting it ported that cross between the suction holes and exhaust holes when viewed from the top of one line aka not deviate from each other.
Ported cross is similar to porting arc (ARC) in the previous post, the function is for stirring the gasoline vapor that enters the combustion chamber though more dense so that the increased torque and fuel efficiency. The difference is, if the model is ported cross (CROSS), adukannya horizontal, unlike ported arc (ARC) is vertical.
Both ARC and CROSS ported models have the same advantages and disadvantages, both increase TORQUE and FUEL EFFICIENCY, only the difference if ported ARC models, more good torque, while the ported models CROSS, its efficiency is better at
CROSS ported models are usually applied in the Honda. Bajaj also apply it in their motors, which in Bajaj XCD 125, Maybe that's the reason why Honda and Bajaj XCD 125 was economical.
4. ported cache (POCKET)
It is the fuel gas channel which has a sort of "pocket" in the middle. Its function is for storing temporary fuel gas prior to entering the combustion chamber. Pouch or cache this position in the inlet. The goal is do not let the time run out of steam out of the corner.
Both ARC and CROSS ported models have the same advantages and disadvantages, both increase TORQUE and FUEL EFFICIENCY, only the difference if ported ARC models, more good torque, while the ported models CROSS, its efficiency is better at
CROSS ported models are usually applied in the Honda. Bajaj also apply it in their motors, which in Bajaj XCD 125, Maybe that's the reason why Honda and Bajaj XCD 125 was economical.
4. ported cache (POCKET)
It is the fuel gas channel which has a sort of "pocket" in the middle. Its function is for storing temporary fuel gas prior to entering the combustion chamber. Pouch or cache this position in the inlet. The goal is do not let the time run out of steam out of the corner.
In this condition, usually power does not directly come out at once, but gradually rise toward peak power. Understandably 4 stroke: p. Well, this is where the role of this POCKET ported models. Gas fuel is stored in the "pockets" were going to "add" additional gas supply fuel to the combustion chamber, so the acceleration is not too late, so they can immediately step on the gas after the bend.
This is similar to how the tubing YEIS his Yamaha RX King. Namely once again for storing "energy reserves" gaseous fuel being stored earlier. That is why RX King acceleration is not discontinuous.
POCKET ported models are usually applied in the motor road race. Porting has benefits:
1 Increasing spontaneous acceleration
2 Increase the pounding machine
3 Make not breath dashed
4 Strong uphill 45 degrees without struggling.
5. It is suitable for a track that many curves
6 It is suitable for a wide area of the capital jammed
7 Make economical fuel. It was due to the lower rpm powerband extends or in other words, no need to twist the gas motor is running, so not much nyedot gasoline.
But it has the disadvantage of not suitable for long track, because not much increase top speed
5. ported VENTURI
Named venturi carburetor so it does not mean each ported, instead. If so the story finished aja soale carburetor will not be removed forever. Named venturi because there is a shrinking part of the porting channel, shaped like the letter V. As the following figure.
The principle works like when we hit the water in the hose. If there is a hose that drains water, then we hit the hole, what happened? Spurting water is going to be heavy due to increased pressure. While its function is created increases the vapor pressure of gasoline from the carburetor / injector. If the pressure rises, then the motor will be very powerful, his character will be fierce originals. Porting this model is usually applied in a wide streetfighter motorcycle Suzuki B-King, Ducati Monster, Kawasaki Z1000, Honda VTR, Triumph Triple, Buell XB Lightening and his friends. The goal is to rapidly rising rpm. Understandably, because using that for "fighting" in the streets, the power must be quickly available, do not be late. Priority ported venturi is the power in the middle rounds.
As the name implies, this is a suction hole which has a cross-sectional shape is not round, but oval. What is the purpose, the goal, the basic theory and background?
See this image:
In addition, the function of the curve after the formation of the oval had been a focus for gasoline vapor flow into the combustion chamber so that when the spark plugs fire ignited, the explosion spreads focus to the piston head.
See the picture below:
Unit discharge for porting is cm3 / s (cubic centimeters per second). The greater the gasoline vapor discharge, the faster the motor.
