Light weight crank pulley good or bad

**cnxnet** · 10-08-2008, 04:18 AM

want to know more about light weight crank pulley
some say good, some say no good for top speed
some say can gain hp but some say is rubbish.

any one can share?

**zac** · 10-08-2008, 05:28 AM

I used it b4, install lightened crank pulley in my E34 520 BMW, also coupled with elec fan... the old bmw shifu was murmuring at first that i was wasting my money so on so forth, but after we tested the car together he was impressed with the acceleration, he said can compete with 525.

My top speed still the same. The pulley is exactly same size as stock, just that much lighter... some aftermarket not only lightened but also became smaller then will have bad effect... anyway, all is just based on me beginner's exp, so pls check wif other senior ppl as well..

**SkYwAlKeR** · 10-08-2008, 06:06 AM

not to say rubbish... it has its benefits.... it reduces the mass of rotation... making ur engine easier to rev/accelerate....

**chaiwl** · 10-08-2008, 08:19 AM

after u try u will know it. the acceleration response is better.

**payed_4115** · 10-08-2008, 08:25 AM

agree with u.....

shinrei · 10-08-2008, 09:01 AM

oic... there's many brand out there but which one is value for money?

**cnxnet** · 10-08-2008, 10:30 PM

Thanks for the usefull reply, any member use that on mivec or V6 engine? what is the result

Quote:

Originally Posted by zac

I used it b4, install lightened crank pulley in my E34 520 BMW, also coupled with elec fan... the old bmw shifu was murmuring at first that i was wasting my money so on so forth, but after we tested the car together he was impressed with the acceleration, he said can compete with 525.

My top speed still the same. The pulley is exactly same size as stock, just that much lighter... some aftermarket not only lightened but also became smaller then will have bad effect... anyway, all is just based on me beginner's exp, so pls check wif other senior ppl as well..

**GT_AUTO** · 10-09-2008, 03:44 PM

to be honest,don't expect a lot of power for this mod.sometime it came back nil on
dyno.some claim to add around 5-6hp.the main thing is acceleration or pick-up.
like what sky sifu said.imagine shaving up to 2kg on ur crank pulley.it can turn faster
w/o much effort.that the reason y this thing was invented.

**JINEIL2EN** · 10-09-2008, 04:33 PM

just be wise when choosing a set of lighten pulley....

**cnxnet** · 10-09-2008, 05:50 PM

Quote:

Originally Posted by GT_AUTO

to be honest,don't expect a lot of power for this mod.sometime it came back nil on
dyno.some claim to add around 5-6hp.the main thing is acceleration or pick-up.
like what sky sifu said.imagine shaving up to 2kg on ur crank pulley.it can turn faster
w/o much effort.that the reason y this thing was invented.

why come can gain hp some can not? we should choose the bigger pulley or smaller pulley or just same size with our original one?