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It would take all day... but as definitions.. I'll try to break it down... but breaking the valvetrain down in 10 mins is imposible.... THIS IS NOT 10 PERCENT OF WHAT GOES INTO A CAM!!! Duration: How long the valve is open... measured in degrees of the crankshaft.. its measured when the cam starts it's lift .05 off the base...advertized duration is rairly true duration being they measure from the point the the ramp just starts(not starts to flow[.05]) Lift: Is how much the valve moves off the seat... but in all reality, thats done by multipling cam lift by rocker arm ratio... this again is not true lift... net lift is the exact measurment of the valve off the seat... net lift is allways true because measured lift doesnt take in account flex and lash.... Flat Tappes(solid lifters): Solid lifters are exacly what they are, solid lifters... solid lifters are gereally desined for high RPM applications... there is no spring to take from the lift of the cam, they don't float, and use a mecantical shutter valve to controll oil flow so the is no guessing... downside is they are high maintenence... then need to be lashed to start, after break in, and ocationally in built motors... Hydrolic lifters: the new hydrolics are great... preload to start and after break in, and you will never hear them bitch again... problem with them is they have pump type valves, whitch usually pumps too much oil for a neddle bearing rocker... and up at 7000 RPM if not perfect for the aplication, they can cause valve float.... Lift: Your car need to breath... right? The idea of lift is simple... more the better... but wait... how could your valve being that open be bad? I mean wouldnt you want more flow? In a perfect world, your valve would open and close exactly at TDC and BDC... but the is a problem... it cant... the lifter has to ride a slope small enough not to tear the lobe off... most cams with high lift run a long duration(being they are open before intake and close after exhaust strokes)... too much duration can kill performance, too little can make your valves open as much as a geo metro... So... in the long run... its all about whats better for you... the high lift is good... the best thing is people allready looked into it... run what people run... best way to stay safe... dont forget... you go too high, you loose low end tourque...you go too low, you loose high end... Again...I don't have the time to break it all down... there is SOOOOO much more into a cam and valvetrain.I recomed you leave it alone and give it to a pro.... enjoy StageZ
  AOL Instant Messenger name: StageZ |
