how does hi cam work?

[SkYwAlKeR]

so if the cams has longer duration, its called "longcams"...???

 

[CarroTT]

long or short duration cams lor

oso got retarded cams, advance cams

even got "low" or "shortie" cams

all sort of cute names to make it interesting to potential buyers lor

 

[Choon]

the "hi" on the hi cam usually refers to the "lift" that the cam exert to make the valves move down n up.

a hi cam will make ur valve being pushed down lower to open wider , thus giving less resistance to flow.

the peak of the loob are higher for a hi cam, not neccesarily wider or fatter.
Just to make the valves open wider.

being specific on the term "hi" oni


duration and position of cam is more usual to be described by "long" or "length" and "degree"

That's y i tot hi cams will exert more force to your valve.. cause the profile is more sudden.. sharper peak and the curvature more curved.. if you get wat i mean..

 

[retrofit1]

What degree will give most good pickup increase?

 

[YuHaNiSa]

camshaft more overlap more power,lift hi to open valve more take air and fuel

 

[retrofit1]

camshaft more overlap more power,lift hi to open valve more take air and fuel

Hi, what i understand is if the duration is high,say 272 above is good for higher rpm or top speed not for pickup right?

 

[SkYwAlKeR]

long or short duration cams lor

oso got retarded cams, advance cams

even got "low" or "shortie" cams

all sort of cute names to make it interesting to potential buyers lor

That's y i tot hi cams will exert more force to your valve.. cause the profile is more sudden.. sharper peak and the curvature more curved.. if you get wat i mean..

thats why u need stiffer valve spring...

What degree will give most good pickup increase?

272 will be reasonable for street use while giving u reasonable driveability....

but if u are those gets vr irritated even ur dashboard vibrate 0.001 scala richter, den dont use highcams....

camshaft more overlap more power,lift hi to open valve more take air and fuel

yeap.... high valve lift allows more air/fuel to enter... longer durations allows air/fuel to be delivered at a longer duration...

both increases power output...

Hi, what i understand is if the duration is high,say 272 above is good for higher rpm or top speed not for pickup right?

if want pickup, rev higher and launch lor...

 

[retrofit1]

thats why u need stiffer valve spring...


Where can i get this stiffer spring ar?:hmmmm:

 

[SkYwAlKeR]

thats why u need stiffer valve spring...


Where can i get this stiffer spring ar?:hmmmm:

depends on what engine u using... if u using those common ones such as evo and so on, stiffer valve springs usually available from performance firm such as HKS and so on...

if u using proton, most prolly u can get from RPW....

 

[Choon]

wat's the stock duration for exhaust and intake angle? anyone noes? for wira se i mean..

 

[khoyos]

Hi, what i understand is if the duration is high,say 272 above is good for higher rpm or top speed not for pickup right?

depends on ur gear ratio (how big ur final drive is) and ur launching rpm (depends on traction - tyres).

if ur gear ratio teruk, n cant launch at hi rpm (as what sky said) then of course 272 n above are lousy. but most of draggers chose very high lift cams, and their pickup are simply out of this world...

 

[CarroTT]

That's y i tot hi cams will exert more force to your valve.. cause the profile is more sudden.. sharper peak and the curvature more curved.. if you get wat i mean..

yalor, tats y lor, so clever

 

[CarroTT]

What degree will give most good pickup increase?

woooo, u must go to uni and ask what kind of degree course they offer lor
u wan bachelor in wat ?
or u wan doctorate ?


hehehee, kidding, i siao siao today :stupid:

 

[retrofit1]

woooo, u must go to uni and ask what kind of degree course they offer lor
u wan bachelor in wat ?
or u wan doctorate ?


hehehee, kidding, i siao siao today :stupid:

Hehe..degree in doctor ayam...my hand are itchy to get this hi cam for my car.Can anybody suggest a good workshop in JB to tune it.:hmmmm:

 

[Choon]

clever leh me.. haha.. of coz, i'm the finest breed of my parents