How does adjustable campulley works?

[openpodkiller]

hi guys, i m newbie here.

i want to know how does adjustable campulley works? is it really can increase the hp for the car ?

sifu sifu here can explain it what is it about and how does it function ? thank you.

 

[clanzkiller]

i'm just sharing as wat i know...might mis out few things..

every car have a cam pulley which located just beside your engine and which carry out wit timing belt...usually cover by a cam pulley cover..if u look at it, it is like some sort of gear,tat in a big size...search google to look for how it exactly looks like

adjustable cam pulley is a cam pulley which the location of the cam pulley is same as original BUT is adjustable..u can either adjust it into advance or retard..depends on which one u would like to play wit..
advance is for low-end while retard is for high-end..
once u choose advance,u wil lose power on high-end..however once u choose retard,u wil lose power on low-end...is vice versa..
u wan play pickup,go for low-end (advance)...u wan play street race like while driving on the highway starting 3rd gear onwards,go for high-end(retard)

u wil notice a bar like ruler on the adjustable cam pulley...the origin position usually at the mid...so for retard,adjust it to left side and for advance,adjust it to right side..
tat's for wat i know... :)
beside,i think they are few thread posted regarding on adjustable cam pulley..u can try search back if u wan to know more...

 

[nitrus]

i'm just sharing as wat i know...might mis out few things..

every car have a cam pulley which located just beside your engine and which carry out wit timing belt...usually cover by a cam pulley cover..if u look at it, it is like some sort of gear,tat in a big size...search google to look for how it exactly looks like

adjustable cam pulley is a cam pulley which the location of the cam pulley is same as original BUT is adjustable..u can either adjust it into advance or retard..depends on which one u would like to play wit..
advance is for low-end while retard is for high-end..
once u choose advance,u wil lose power on high-end..however once u choose retard,u wil lose power on low-end...is vice versa..
u wan play pickup,go for low-end (advance)...u wan play street race like while driving on the highway starting 3rd gear onwards,go for high-end(retard)

u wil notice a bar like ruler on the adjustable cam pulley...the origin position usually at the mid...so for retard,adjust it to left side and for advance,adjust it to right side..
tat's for wat i know... :)
beside,i think they are few thread posted regarding on adjustable cam pulley..u can try search back if u wan to know more...

So what 'timing' on the adjustable cam-pulley would be the best for people who want pickup, but also like to rev high rpms for the pickup each gear?

 

[SkYwAlKeR]

So what 'timing' on the adjustable cam-pulley would be the best for people who want pickup, but also like to rev high rpms for the pickup each gear?

dvvt...

yes, its true that dvvt/vvti can do such stuff... thats why this technology is created... it advances and retards the timing automatically according to ur driving style, engine load, engine speed and so on...

 

[tofu_manic]

troo troo

oso this adjustable cam pulley u hafta play around with it to get the best settings that you like

 

[nenon]

it depends, if carb then better retard and if inj/ FI go for advance

 

[clanzkiller]

So what 'timing' on the adjustable cam-pulley would be the best for people who want pickup, but also like to rev high rpms for the pickup each gear?

like wat tofu_manic said..u have to adjust and try it to suit your decision...
u can't do all the advance...because if u did tat...u totally don have any power left for high-end...u can try it by max advance and see wat happen on high-end..hahaha....
so u have to be balance..some ppl like 1st n 2nd gear speed...some ppl like 4th n 5th speed...

for me i like the temptation of 1st n 2nd :)..

 

[openpodkiller]

haha .....thank you to bros clanzkiller,nitrus,skywalker,tofu,nenon.

i happy that u all give reply and useful knowledge to me....but one thing i don understand that is if i adjust to retard position (for high end), is it my pick up(low end) power will be less immediately(even less than original?)?

i always use north-south highway (KL - penang-KL) feel bored with the high end power la. after 120km/h then power is suck la.....so i plan to put adjustable campulley to make my high end power abit kuat than ori, as my fren's fren told me about this.

thank you again bros!!!

 

[boosook]

yes its true that if u retard it u will get better high end but campulley alone wont give u the satisfaction u need for high end. another way to improve your high end is by changing ur gearbox with a lower final drive ratio.

yes your low end will drop,if im not mistaken worst than ur stock. u might have trouble going up hill. use open pod if u want to improve ur low end.

 

[clanzkiller]

haha .....thank you to bros clanzkiller,nitrus,skywalker,tofu,nenon.

i happy that u all give reply and useful knowledge to me....but one thing i don understand that is if i adjust to retard position (for high end), is it my pick up(low end) power will be less immediately(even less than original?)?

i always use north-south highway (KL - penang-KL) feel bored with the high end power la. after 120km/h then power is suck la.....so i plan to put adjustable campulley to make my high end power abit kuat than ori, as my fren's fren told me about this.

thank you again bros!!!

yes..u can only chose either low-end or high-end adjustment...
if u chose high-end,your low end wil slightly decrease...cause it;s more concentrate on high-end..it wil lesser then original settings...
anyways,adjustable cam pulley doesn't increase your current hp..
but only increase in either torque or maxspeed...

wat car u drving bro?if u wan high-end speed,go for something like hi-cam,vtec,mivec...
or like boosok said...u can change your gearbox..have to depends whether u using manual or auto transmission too..

by changing adjustable cam pulley,the power u feel wil be slightly diff only..not as high as u changing internal parts..

 

[openpodkiller]

thanks bro boosok and clanzkiller. i understand ur all info.

i m currently driving saga lmst, 1.3L stock engine,manual. i think i do not change my gearbox yet la....cos the car is still new oh(sayang oh changing it.). hehe ....but, now i need information about HI-CAM that bro clanzkiller mentioned above. what is hi-cam actually ?

another thing is if i change adjustable campulley, how is the FC after install? higher?

thank you 1st....again! haha

 

[kenzo]

high cams are camshaft with high duration and more lift, bro, y dont u go to www.howstuffworks.com and check it out, it even gives u pictures and animation on how it works, now there u can get a clear picture of it..

 

[tofu_manic]

openpodkiller, the difference of fc with the adjustable cam gear is negligible, dunneed worry, its not like bolting on a race cam

altho, if u advance the cam gear a few degrees to bring the powerband out earlier, theoretically u will have slitely better fc as u have better power down low, where u do most of ur driving

a high cam or a race cam will make ur mid-to-high rpm better...at the expense of low end, so fc will be a bit affected, depending on ur driving style and specification of the camshaft...

a milder more normal camshaft will make ur mid rpm nice but it will be breathless at higher rpm...

good luck!

 

[openpodkiller]

yeah ....catcha!!! thanks bro kenzo and tofu .i understand oredi and i know what i need to do oredi ......anywhere thanks again ya.

 

[SkYwAlKeR]

it depends, if carb then better retard and if inj/ FI go for advance

not necessary...

i happy that u all give reply and useful knowledge to me....but one thing i don understand that is if i adjust to retard position (for high end), is it my pick up(low end) power will be less immediately(even less than original?)?

i always use north-south highway (KL - penang-KL) feel bored with the high end power la. after 120km/h then power is suck la.....so i plan to put adjustable campulley to make my high end power abit kuat than ori, as my fren's fren told me about this.

thank you again bros!!!

yes... retard ur timing, ur throttle response at low end will be abit sluggish... but mid to high rpm revs feels torquey...
advance ur timing... nice smooth initial pickup at low end.... but runs out of breath at about 120kmh above...

yes your low end will drop,if im not mistaken worst than ur stock. u might have trouble going up hill. use open pod if u want to improve ur low end.

open pod improves low end torque??... i thought the other way round??... drop-in improves low end torque due to the necessary backpressure.... open pod works wonderfully at mid to high rpm as there is minimal restriction/backpressure...

yeah ....catcha!!! thanks bro kenzo and tofu .i understand oredi and i know what i need to do oredi ......anywhere thanks again ya.

so, whats ur plan next??...

 

[clanzkiller]

shoot 99..hahaha...kiding :)

 

[renxun]

if i were you , i will change a cam of the same duration but higher lift. and change to a better breathing filter. and also if you want better low and and better high end at the same time... there is no other way other than bore your engine and put bigger piston in it... there is no substitute for better capacity.....

 

[openpodkiller]

haha ....thanks bro skywalker and renxun.
my next plan is change better drop in air filter 1st like KNN one. then the campulley ah, i still don know la ....i like the pick up and the same time i like top end torque also ....very hard.....(thinking of change engine to mivec lah....easier... sure got power one la. ...wakakaka)

yesterday, i try to do an experiment by myself. i took out the airfilter cover and just left the airfilter(the round white color) oli. and i tested from seremban(as i went to visit friend house at seremban) to kl. respond at 100km/h to 120km/h (RPM at 3500)is good la and can feel abit diff from stock.hehe .. but, i found out the FC also high oredi after i did this "openpod". why ah ?

and one more thing, like what bro renxun said, change to bigger pistons with stock engine block,will it spoil the block faster ah ? and my engine 1300cc and carb injection , can bore up to how many cc ?i mean maximum la ....

sorry bros, need advice and commend again. newbie ma.........hehe

 

[nitrus]

yesterday, i try to do an experiment by myself. i took out the airfilter cover and just left the airfilter(the round white color) oli. and i tested from seremban(as i went to visit friend house at seremban) to kl. respond at 100km/h to 120km/h (RPM at 3500)is good la and can feel abit diff from stock.hehe .. but, i found out the FC also high oredi after i did this "openpod". why ah ?

Sorry to burst your bubble my friend, but what you felt was most probably psychological effect.. Or maybe just very very slight effect only at higher rpm because the air around wasnt restricted to your stock filter cover at high speed. But you're still using your stock filter.. Remember? Same size, same filtration.

The higher FC was most probably the result of your right foot testing out the 'new found power' and end up revving more than usual. :)

But if i'm wrong then, shoot away.

 

[SkYwAlKeR]

haha ....thanks bro skywalker and renxun.
my next plan is change better drop in air filter 1st like KNN one. then the campulley ah, i still don know la ....i like the pick up and the same time i like top end torque also ....very hard.....(thinking of change engine to mivec lah....easier... sure got power one la. ...wakakaka)

yesterday, i try to do an experiment by myself. i took out the airfilter cover and just left the airfilter(the round white color) oli. and i tested from seremban(as i went to visit friend house at seremban) to kl. respond at 100km/h to 120km/h (RPM at 3500)is good la and can feel abit diff from stock.hehe .. but, i found out the FC also high oredi after i did this "openpod". why ah ?

and one more thing, like what bro renxun said, change to bigger pistons with stock engine block,will it spoil the block faster ah ? and my engine 1300cc and carb injection , can bore up to how many cc ?i mean maximum la ....

sorry bros, need advice and commend again. newbie ma.........hehe

change to k&n filter first la... after that retune ur carburetor afr... sure u can notice some difference... will result in better fuel consumption as well...
if u got the money, change mivec engine lo... prepare 10k for it...

fc high because u constantly playing with ur throttle revving it up... can say physcology lar... if u maintain ur throttle at constant level, i'm sure fc will decrease compare to previous... most important, retune ur afr regularly as carbie afr easy lari....

i've tested this method before... (diy open pod by removing the airbox)... vr good at mid to high speed... because less air restriction due to the small airbox... cruising at highspeed also result in lower rpm as less air restriction... as a result, melaka-ipoh trip can save me about quarter tank of fuel...

not recommended to bore ur 1.3 block la... best bang for buck is to find 1.5 block and bore it to fit bigger oversize pistons.... 1.5 block has thicker cylinder block wall compare to 1.3 block... hence, it can bore even more to fit even bigger oversize pistons...

Sorry to burst your bubble my friend, but what you felt was most probably psychological effect.. Or maybe just very very slight effect only at higher rpm because the air around wasnt restricted to your stock filter cover at high speed. But you're still using your stock filter.. Remember? Same size, same filtration.

The higher FC was most probably the result of your right foot testing out the 'new found power' and end up revving more than usual. :)

But if i'm wrong then, shoot away.

can i shoot??....

by removing the airbox, u are experiencing open-pod effect... hence, u are free from air restriction due to small airbox problem... standard airbox has a small opening at the end which measures 2.5" in diameter... how much air volume can pass thru it at high speed.... remember, the amount of air sucked by engine is alot at mid to high rpm... that small 2.5" lubang poses some air restriction when air needs to travel into the airbox into the carburetor...