Anyone here fitted a lightened crankpulley or crankshaft in your car?
If Yes, how much effect doest it make?

This crankpulley is the part where you fit your Timing belt if im not mistaken?
and the Crankshaft is the thing that controls you car's valve timing?

Plan to do it on my car, But dont know how much would it cost, or how adverse the effect be. And most importantly, do you need to modify your intake/exhaust system after these mods? As you are pumping more power out of your engine?

As many people will normally go for Air-filters and Exhaust, This is internal engine Mod stuff

dude crank pulley is not consider as internal rite? i think it's still external (internal usually means ur pistons, valve springs, valve, blocks & etc).....depends on wat engine is on ur ride...just imagine holding a 5 kg crankpulley & start turning (for ur 1st test)....then 2nd test u use a 1kg crankpulley & start turning...which will turn faster & more turns? if u got the budget lighten ur flywheel as well...i heard if lightening ur flywheel will kill ur top ends faster as well i wonder isit true?

there are currently two types of lightened crank pulley in the market, one of which is undersized, and the other which comes with a damper. most of our standard pulleys comes with a rubber damper to absorb the critical vibrations comming from the crank.

advantage of having an undersized pulley is that the revs climb much faster. this is what we use in our race cars. with most race cars, we rebuild out engines much after every race, so con rod bearing wear is not a problem as we change the bearings during each rebuild. so con rod bearing wear is not a factor.

advantage of having a lightened and dampened pulley is that the revs will climb slightly faster, not as fast as the undersized pulleys, but with the damper in place, we will have peace of mind when it comes to the wear & tear of the con rod bearings.

hope this answers your questions on the crankshaft pulley

hmm true true as i know mythology lighten crank pulley came with a rubber damper which almost similar to ori pulley....hmm btw mad driver just a question...i know the revs will climb faster than usual but how about when you stuck in a traffic jam accelerate & decelerate situation when u decelerate will it have more jerk due to the innertia of the pulley have been lighten? how about hill climbing? will it hard to climb on hill compare to ori pulley due to innertia (or does this case just apply for flywheel ligthening oni)?

And I bet you gain a few horses by having it installed? Or more to "freeing" some horses.

same horses

but reduced moment of inertia, which means while your rev climbs fast it drops as fast as well.

general speaking u will hav an accelerated engine, but how it feels like I hav nvr experience

haha if it drops as fast i guess it the car will jerk when u decelerate i guess...u will feel the engine braking much greater than b4...

so far, the only jerk that i encounter during a traffic jam situation is that motobike that goes in and out of traffic

So you're saying better throttle response, is that it?

has anyone actually fixed it in their car before?

how much would a piece like that cost in your car?

I think all in all the engine will seem lighter than stock..but what CFS said is kinda true, If the Engine Rev's easier, it will Jerk easier too when you release your throttle.

mythelogy pulleys cost RM600
I am planning to install it in my car and see the difference

haha good 1 there lolz....but i'm sure mythology 1 is one good stuff..nvm i try friend car this weekend see got any effect or not 1st..mythology is quite light but not as light as those without rubber damper1 haha hehe

what car is your friend driving?

s4ph lolz u know ler...hehe actually a couple of friend install the normal type without damper type (from thailand made forgot the brand name adi) & a couple of them install mythology which comes with damper...from what i get feedback from them is dat the mythology is not as light a the normal without damper type....i wonder is there any issue on reliability on long term hehe

This post has been edited by CFS: Mar 16 2007, 11:12 AM

CFS,
i guess if u had the $$ u would go to the one with damper... firstly u will save ur engine a bit becoz it has a damper, secondly, if its too light then u will lose a bit of low end torque, by looking at the methology pulleys i guess that the torque loss is neglectable in the lower range. try to see the dyno chart for the one without the damper and compare.



cheers

haha i guess u know me well....i will get the mythology1 rather than the other1 due to it's rubber damper haha....the dyno chart i saw long ago adi hehe...
cheers

Mine will be ready next week so wait for my comments
Still got performance plug cables haven't install yet, will do them 1 shot with some injector cleaning and other services

so which is better in terms of torque in the lower end, say below 4K?
and power in the high end, ard 6K?

some of the members tat had done it
MYTHELOGY

thanks, i also have seen this b4, what i was referring to was if there was one to compare with the cranks pulley without the damper.

and also for a long time i have wondered, stock neo 0-100km/h is 8.4 sec???
stock gen2 manual is about 10sec so a car about 50kg lighter can do so much better?