the_one
Super Veteran
tao lng.. or try mo rin dito papschappy80cc said:
http://cgi.ebay.com/ebaymotors/D2K-Moto ... 0409473712
QUESTION AND ANSWER THREAD
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http://cgi.ebay.com/ebaymotors/D2K-Moto ... 0409473712
BasTarD
Super Veteran
welcome to the newbie club paps, si sir sidro leader namin matapos na promote si sir pekz ng expert... :shock:
Valve float
From Wikipedia, the free encyclopedia
Valve float is an adverse condition which occurs when the poppet valves on an internal combustion engine valvetrain do not remain in contact with the camshaft lobe during the valve closure phase of the cam lobe profile. This reduces engine efficiency and performance and potentially increases engine emissions.
Similar conditions
Valve loft is utilizing a controlled float to increase lift and duration of the valve open cycle. In some motorsports there are rules that limit camshaft lift; therefore, provoking this type of exploitation. By properly optimizing the system, one can actually achieve this without undue stresses added to the camshaft lobes and tappets (lifters).
heto yung effect ng valve float na tutukod ang valves sa piston which results to expensive and extensive repair paps..valve bounce...
Valve bounce is a related condition where the valve does not stay seated, due to the combined effects of the valve's inertia and resonance effects of metallic valve springs that effectively reduce the closing force, and allow the valve to re-open partially.
Remedies
Stiffer valve springs can help prevent valve float and valve bounce, but only at the expense of increased friction losses and higher stresses in the valvetrain system. Various techniques have been used to offset the effect of stiffer springs, such as dual-spring and progressive-sprung valves, roller-tipped tappets, and pneumatic valves.
Alternative solutions
Italian motorcycle manufacturer Ducati uses the desmodromic (springless) valve system to counter this problem and allow for higher engine speeds. The system consists of a mechanical lifter mechanism that uses a second rocker arm to push the valve closed. Formula One racing engine manufacturers use a pneumatic system to close the valves to allow for very high RPM without valve float.
Valve float
From Wikipedia, the free encyclopedia
Valve float is an adverse condition which occurs when the poppet valves on an internal combustion engine valvetrain do not remain in contact with the camshaft lobe during the valve closure phase of the cam lobe profile. This reduces engine efficiency and performance and potentially increases engine emissions.
Similar conditions
Valve loft is utilizing a controlled float to increase lift and duration of the valve open cycle. In some motorsports there are rules that limit camshaft lift; therefore, provoking this type of exploitation. By properly optimizing the system, one can actually achieve this without undue stresses added to the camshaft lobes and tappets (lifters).
heto yung effect ng valve float na tutukod ang valves sa piston which results to expensive and extensive repair paps..valve bounce...
Valve bounce is a related condition where the valve does not stay seated, due to the combined effects of the valve's inertia and resonance effects of metallic valve springs that effectively reduce the closing force, and allow the valve to re-open partially.
Remedies
Stiffer valve springs can help prevent valve float and valve bounce, but only at the expense of increased friction losses and higher stresses in the valvetrain system. Various techniques have been used to offset the effect of stiffer springs, such as dual-spring and progressive-sprung valves, roller-tipped tappets, and pneumatic valves.
Alternative solutions
Italian motorcycle manufacturer Ducati uses the desmodromic (springless) valve system to counter this problem and allow for higher engine speeds. The system consists of a mechanical lifter mechanism that uses a second rocker arm to push the valve closed. Formula One racing engine manufacturers use a pneumatic system to close the valves to allow for very high RPM without valve float.
airforce96
Super Veteran
paps..npanood mo b ung kalat ko sa boomland?gnun nngyari....gwin mo,kung saan ngtwist...i kontra mo sa pader...mhirap ieexplain eh...madali lng ibalik yan...mdali lng tlga mgtwist ang mga handle bars ntin.
Sidro
Super Veteran
Mga papables newbie question about sa electrical natin. Based sa T135SE/T135S wiring diagram, yung park light, signal light, tail light and headlight is connected together sa isang line and supply lang na connected sila direct sa A.C. Magneto natin. balak ko sana kasi idirect sya sa battery or ilipat ko connection nya dun sa output ng rectifier/regulator natin. Then I'll provide a seperate 10amp fuse..
--ok lang ba tong gagawin ko?
--wala ba effect to sa battery ko?, I mean bka sirain nya batt ko?
--wala din ba pangit na effect to sa rectifier/regulator ko?
--Do Ineed to increase amp capacity ng battery ko?
thanks..
--ok lang ba tong gagawin ko?
--wala ba effect to sa battery ko?, I mean bka sirain nya batt ko?
--wala din ba pangit na effect to sa rectifier/regulator ko?
--Do Ineed to increase amp capacity ng battery ko?
thanks..
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