Belt slip when belt is in bad condition,or during rain water hits it,or pulley groove has become sharp after so many rotations.

But i mean the slip is the damper between the lcp. As u can see in ur photo,the black damper will twist,causing the outer pulley and the crankshaft one to run away. Once the damper give way,the outer pulley will drop out,and u have no more belt...

Its very normal in cars tat uses this kind of pulley ie mercedes.
Kereta jepun i not sure wat model uses it....i more interested in merc...

So u only read materials ? Have u tried using it technically ? Materials are easy to type out from keyboard warriors technically did u see the market yourself ? Jasma Crank Pulley are undersize and light and yes the lighter the better no wrong there from
those acc shop salesman . Jasma one has been cheap and cheerfull selling so well outthere . Dont juz read materials and create " awareness " . Theory are not always right . Fit in and check out the real thing and how many engine gone case with LCP ? Like one in a million news of it ? Lol

its ok. most LCP r balanced. jus some cheaper 1 more rough workmanship. anyway, till now i never heard any real life prob of belt snap / crank oil seal broken etc

ab d damping stuff, for low bhp car, kalo ada good la.. if dun got, tidak apa.... lol..

There's a reason they're heavy, it's because they act as dampeners so the engine doesn't rattle all the front bits to death. The lack of weight contributes to bearing wear and attached component wear.

Without the weight or the harmonic balancing of a good crank pulley, the car rattles itself to an early grave. That's why people who really really want the most power out of their cars go for an ATI performance or Ross Tuffbond crank pulley, note that these are even more heavily built than standard.

It's the same for lightened cam pulleys, for what little you gain, the fact the advance and retard settings are just held together by 5 shithouse screws without loctite in some cases is just a recipe for a blown head.

Best is stock sometimes

Yes. I read and meet with knowledgeable people to exchange knowledge. I open my mind and accept all convincing facts, I never dispel the fine truth that LCP brings in improvement. Theories may not always be right, but to prove a theory wrong, you need genuine fact to prove how the theory is wrong. Theories serves as a guideline. Just like how rules were set.

I trust, you never read the links I've posted. Those are general information on how crank pulley functions. there is no ill intention stating negatives on LCP.

ratio of 2 out of 6 accessories shop I've visited have knowledge on cars. Generally Most accessories shop salesman will just sell sell sell and sugar coat you with words of improvement assured. After all, it's nothing personal, its business. When you walk back and claim warranty on your wrecked engine, they will give you tonnes of reasons stating, your car is bad from the beginning, you expect we warrant you something sold so cheap for your engine?, we never promise to warrant your engine from the beginning, etc. Hope you will take their words with a grain of salt next time.

Note however, there are still a handful of reputable shops giving good pointers and directions on modding. It's not all lost & hopeless.

Technically, LCP was on my milestone list of upgrades. However, after learning bits and pieces around, I just took a big leap and increase my stock hp and torque with another option.

If you take your stock crank pulley and walk into a fabrication shop. they can lathe machine a much better aluminum crank pulley. Go for bulk, you can sell at a much cheaper price than jasma.

1 in a million still means there is a tendency of it to happen. You may say this now, but things will be different if you're that one guy out of the million.

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Lastly, you remind me of an old man whom I've advised to quit smoking due to health reasons. He told me the same thing. "Son, I've been smoking even before you're born. Look at me now. If smoking is deadly, I wouldn't have live up to this age. You won't understand cause you never smoke." That's how I feel now, having good deed but being hammered as a keyboard warrior

I have no intention on winning this argument or winning a fight. Neither do I want to deter people from installing LCP. I'm like empire23 here just to share some pointers. Good or bad is up to the general public to perceive. Depending on the next wave of comments, I may just remain silent to avoid any conflicts. Like the previous post, I do concur stock is still best.

On the side note, loctite is damn awesome, I've been using it on fluid joints and it never leaks.

This post has been edited by Vervain: Jan 25 2012, 12:11 AM

Whats with the rudeness mate?

People politely sharing info but you have this sudden urge to flame him and call names? Its not like he pulled this info out of thin air.

Did you even read the links he so thoughtfully posted before launching on your tirade? Come one day no one will share any knowledge on Lyn for fear of being ridiculed and flamed, and i will know exactly who to blame.

Just chill and take it as what it is, some friendly info sharing.

This post has been edited by dares: Jan 25 2012, 12:55 AM

ermm... action speaks louder than words? its been tested locally..

this matter already been discuss many many times around d world..i guess he kinda frust liao...lol.

again, those rubber thingy is good to have, takda also ok for small engine...btw, d metheology shows malaysia apa pun boleh..lol


u guys will b surprise dat stock crank pulley do cracks... aftermarket provide better material, t6 aluminimum yada yada.

edited:typo

This post has been edited by low yat 82: Jan 25 2012, 01:48 AM

Without theory, you cant understand how anything works..this will just lead you to taking your car to a shop, paying the guy up front for stuff you dont need or understand, go drink some coffee and come back once the job is done. Take your ride for a test drive later and achieve godlike speed in your head.
point :just because something sells, doesnt mean its good or useful. read : magnetic fuel saver yada yada..
My point is similar to vervain..ive got nothing against jasma or using an LCP, but before you go out there and spend money on a mod, you need to know the pros and cons and the best way to find out is by reading about it and asking in forums. Theory may not always be right, but you cant also go and buy every part out there just to test it and decide.

Dude, ive seen aftermarket "pro street" clutch covers which were supplied with allen screws..to quote you, 5 shithouse allen screws. Now thats gonna keep it all together eh?

Orh >.< i been using lcp for 2 yeard and my car has been half my track and daily drive car . Lcp has boomed my engine and it became Optimus Prime . Basicaly hks , m7 , Trd , works , arospeed , redline , mythelogy all can close liaw lor if its so bad ... And in world of performance modding without buying try and test it out trial n error u wont know which is best . U hoping people will share thier setup with u ? Lawl . Shoot me all u wan but.. remember that LCP are still
used worldwide by famous tuners and yah that 2 famous brands mentioned above heavier LCP i wanna see u use that in your car when air con is on . Track car an afford to use it cause they dont even have air con .

This post has been edited by Peekab0o: Jan 25 2012, 09:27 AM

Understood where you are coming from.

But the fact is shit happened to some who used LCP, so it's good to know that there is a risk, even if it's one in a million. Vervain did not shoot down LCP, he is merely pointing (in good faith, I might add) out that there is a risk, however slightly, to this particular upgrade, just in case others dunno about it.

If I am interested in LCP, I won't be put off by his information, but I will be glad now I am better informed and will be more cautious when selecting a LCP for my ride.

Not all aftermarket is gewd that's for sure. Not everything lighter is better. Good engineering isn't common.

Well if someone buys something liddat, the least that can be done is 2 titik aerospace grade loctite.


I've got a Ross rebuilt dampener in on my RB25DET running 13 PSI of boost. No problems with aircon mate, still cold.

If they made one for my 4B11T, I'd get it.

Trial and error is fine, but like Tesla's theory versus Edison's trial by error, I'm siding Tesla . I mean I've seen HKS lightened cam pulley adjustment run out due to fiddly screws, so just because it's branded doesn't mean it is good.

You may not have heard of other brands like Quaife, Pfitzner, BorgWarner, PAR, DBA, Alcon and so on, but they make good stuff. You don't need to be famous to make decent parts and doesn't mean if you're famous, you do.

since there is no LCP for my peugeot. do u know any workshop that can make one for me? head they cn clone the original LCP and make it lighter

stock original already Lcp? then buy new original one..hehe

I have heard of most of those brand except PAR
Some more uncommon brand:Buschur Racing,Bulls Eye Power,OS Giken,ATS,Full Race

PAR is Precision Automated Robotics, an Aussie company that makes MTs in Melaka.

OS Giken makes really hard clutches, a workmate of mine runs an R30 with an RB25DE with an OS Giken twin plater. Those buggers are on-off.

ATS has a lot of nice kit but Full Race and their manifolds....... ......

Either way, in regards to the LCP, really, what is the point unless you want to dampen something? If you can keep the dampening and balancing at the same level while losing weight, fine, good, but the reality is most of the time, you don't.

Behind the crankshaft you have the rotational mass that is the flywheel, the clutch and the whole damned car. In front, you have the aircon, alternator and so on. A reduction of a 2kg tops in just isn't going to bring out the beast in your damned car.

For the amount of money spent on the LCP, I can buy myself KFC and some minyak, go for a hard drive and set my tune correctly and still get more power. Malaysians are just in love with anything shinny when it comes to modding.

U were right ab d 2kg tingy. But d reduction means alot for puny engine..(dun expect too much though...lolol)

for engine powerful like urs, dampening d torsion force is d main reason, but for puny 4g15 d torsion force n vibration r soo...

LMAO.. behind the car is a booth full of shit and a 200kg subwoofer.

Another thing I dont get is this :

Wheel (before)
Power 96 hp (72kw) @5868 rpm
Torque 130 Nm @ 4173 rpm

Wheel (after)
Power 99hp (74kw) @6141 rpm
Torque 129Nm @ 4378 rpm

Well, shouldnt your HP be higher (obviously) at a higher rpm? My car makes more HP at a higher rpms without an LCP
In fact right up to 4500rpm, your stock crank pulley is doing a better job than a lightened dampened billetted forged titanium aluminium hybrid alloy crank pulley with a piece of rubber. (LDBFTAHACP + PR)

HKS japan sold LCP few years back even before malaysian know about it . so how a big company would risk ? as long the pulley is balance in some way how it could wreck ur crank ? wreak crank or crank oil seal my cause by improper instalation oil seal . when the oil seal is improper install it my cause the valve seal to worn out or the inner retaining wire in the oil seal may came off and scratch the crank hence crank damage and unrepairable oil leak .

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Added on January 26, 2012, 4:16 pmso if using lcp could ruined ur engine so how about using lighten flywheel ? since it could effect the same way like the pulley ? some time the info u found on web aka information highway can be olso MISINFORMATION HIGHWAY .

This post has been edited by sinister_sid: Jan 26 2012, 04:16 PM

People don't want to believe that gaining power isn't easy. There ain't no magic pill for it. Even for example the air intake. You upgrade the air intake and for a while you get extra power, because more airflow means the system runs leaner and timing can advance to suit. But once the ECU figures out what you've done, 7 out of 10 times the bugger will downtune the car to rich, although the car will still be more responsive on the throttle because of flow velocity, all because ECUs are dicks.

Also some of these pulleys aren't the same size as stock most of the time. Meaning they underrun the components connected to the belt. That's shite.



I put poop in a box and got General Electric to put their name on it, does it make it any good? For example, among Evo X owners here, the HKS Hipermax is known as crap and so is the shit made by TEIN. They're both big names but most would go for the cheaper and better Eibach Federn kit or having the dosh, the Ohlins DFV. Brembo makes good brakes, but I'm trading them in for Alcon goodness.

Just because it is balanced doesn't mean it wont kill it. No balancing act is perfect. So there is always some vibration, now vibration is once thing, but as all engineers know when vibration hits the right note you have resonance, which is a form of harmonic that rattles bits to shitsville. That's why you also call the main crank pulley a "Harmonic dampener" for a reason. Issues won't show up right away, but increase wear and tear.

So why isn't the lightened flywheel in the same league as the LCP? Because the LCP itself must get rid of harmonics, the lightened flywheel has the springs located in the hub of the clutch to absorb any harmonics . Do you know why racing car with lightened flywheels and unsprung clutches have to have their hubs, screws, prop shaft and all have to be replaced regularly? Driveline shock

err... myth lcp is a 1 piece unit with rubber belt slip in the groove... if u got see properly laa...
if u say the rubber will twist, means the whole pulley can twist???....

flywheel has springs??... cannot brain bro... got picture??... sorry for my noobness...