lighten crank pulley (alloy)

[ashyu90]

whether lighten crank pulley (alloy) is a much help in improving the performance of the engine???? :hmmmm:

there are many differences from the oem crank pulley???

 

[hachiroku clan]

its lighter so it gives your engine faster response and it unleashes a few hp.. but sifu's from here can help u out more i guess..

 

[ashyu90]

sifu..plz help...any idea???

 

[amrancharger]

read somewhere that without the dampener in stock crank pulley, it will shorten the life of the engine...
i wonder how far is the truth in it... :hmmmm:

 

[ashyu90]

yup..i also need to know what the advantages using lighten crank pulley (alloy)??

 

[amrancharger]

LCP(Lighten Crank Pulley) shud give u more pick up due to the lighten characteristic.

wat i read is dat...smaller/underdrive pulley will sacrifice your top speed plus burden the car electrical system but gives u the biggest gain in terms of butt dyno...coz it shud be very small and light...

if u wanna use LCP, try to get LCP that is OE size.
other than the pick up...i dun see any significant of using this LCP...

btw...i m using one in P.Myvi...well its a small cc car and manual...just felt the car revs very quickly/eagerly...and my butt dyno says i does increase the pick up...but i never got the chance to try top speed as i dare not push the pedal anymore...uhuhuhu!

 

[^pomen_GTR^]

my opinion....

to keep thing in balance when we change lighten crank pulley...change into lighten flywheel also...

 

[amrancharger]

if we do lighten the flywheel also...wouldn't it affect the car ability on hilly roads...
heard dat cars with lighten flywheel will have less power to climb hilly/steep roads...

my fren with lighten flywheel broke his car clutch plate if not mistaken when trying to overtake cars on genting road as he just use third gear all the way in order to overtake..ahahaha...

 

[Viera Sasaki]

if we do lighten the flywheel also...wouldn't it affect the car ability on hilly roads...
heard dat cars with lighten flywheel will have less power to climb hilly/steep roads...

my fren with lighten flywheel broke his car clutch plate if not mistaken when trying to overtake cars on genting road as he just use third gear all the way in order to overtake..ahahaha...

From my experience using the lighten flywheel, it does decrease the torque and it became worst when going uphill. But it does increase the throttle response a lot.

 

[ashyu90]

so, what the disadvantages using thats part??

 

[DanzEterna]

hurts your wallet :)

 

[93na]

you will feel lighter and more responsive, i am using works wan now on my 1.8 its help together with cam pulley and better clutch.. he he he.............

 

[amrancharger]

you will feel lighter and more responsive, i am using works wan now on my 1.8 its help together with cam pulley and better clutch.. he he he.............

hi there...
i have a few doubt on works LCP...
coz read in the advertisement...it is smaller size than OE.

so want to know yr feedback how was the top speed afterward?
tq in advance...

 

[^pomen_GTR^]

under-drive pulley.....

reduce the power steering load, alternator load, A/C compressor load from engine rotation....

means engine can turn easier (and might release a bit of missing power)......

but downside.....battery charging only happens at higher rpm than std..not good for those who always stuck in jamm.....and a/c oso not really cold during idle...coz the rotation of those a/c and alternator was reduced....steering might become heavy at slow speed oso


how it change the result i didn;t really know....u need to test wether to check if u like it or not...

 

[ashyu90]

i have a problem here...i have using LCP since 2 or 3 years ago...no problem with my engine...but now, when i do majot modification n get more power...i have problem...last 2 weeks...i "tarik" my car until rpm 9k...something bad has happen...my crank pulley was broken..crank angle crash...damn...now i use oem crank pulley...pomen said...better safe to use oem because there are have rubber that can absorb the vibration.....

 

[amrancharger]

wat brand of LCP bro?

IMHO, the crank pulley is a component directly attached & bolted down to the crank, it has no electrical or mechanical parts, pretty UNLIKELY it would failed. for example if i ever turbocharged my Myvi with additional....say 50 hp, the engine would pull stronger and quicker that's all, the RPM redline should remains the same. The pulley will not go out of shape nor break apart from the extra power.

However, chances of belt slippage is possible when there's a sudden surge in engine RPM = less grip on the drive belt i guess...due to the extra power.

This happens when there's a sudden RPM surge, the engine turning so quickly that the grip between the pulley & belt slips momentarily. it is very quick mili-sec squeaking noise from the belt slippage. but that should not damage the engine nor the pulley.

however if my myvi produce power more than 150hp...i would avoid the LCP...

 

[civicskunk2]

just bought LCP. first drive was very good. during traffic jam is good as easy to accelarate. but when no cars on hway to reach 140km so damn hard. damn!!!!!. so to cucuk bigger cars is like hell. cars revs up more but car not moving fast. so moral of story i seek for accelarate duirng start stop & traffic jam i end up scrificing stop speed. u cant have both worlds with LCP. i think i need to get the oem back. really frustrated. maybe i need to retune my emanage. i think thats the way to get both.

 

[DanzEterna]

im using LCP...pick up good but top end not very good....

 

[Izso]

Not all LCPs are undersized. I personally don't recommend undersized either unless your car's a race car and is always high revving the crap outta the engine.

I'm using the Mythelogy LCP which is slightly (3% to 5%) undersized... and the difference is the acceleration. That's it. Top speed, torque, HP, all not affected.

However there's a risk when using LCP, the rubber dampener on stock CP is called a "harmonic dampener". It absorbs minor or any sort of vibration caused by imbalanced crank or generally the whole assembly. Without the rubber you run the risk of wearing out your crank oil seal or the crank pulley much faster. No catastrophic damage or whatever scary stuff.

My crank assembly and my original pully was balanced when the engine was rebuilt. When it spoilt (the pulley) I changed to 2 original pulleys and each one got damaged one way or another. Imbalanced pulley la, damn loud squeeling noise la, then finally I swapped to the LCP. Now I change my crank oil seal about every 5 to 6 months because of leaking problems.

So not only do I have to worry about harmonic vibration, I have a problem with balancing too but at least the CP is no longer breaking down like the earlier 3 OEM ones.

 

[D7zul]

on 20v, the crank pulley has no rubber what-so-ever..

from what i see la..