im planning on using a lighter crank pulley. would it work? any result? will it have some bad results as broken pump or something else?
so. should i get one?

 

I wouldn't use a "lightweight" or unbalanced pulley on a stock engine, or one that hasn't had the bottom end balanced. The stock pulley is made to absorb vibrations from the crank.

I'd say no.

 

hmm.. and if i balance only the pulley ?

 

You can't balance a pulley.

Your not going to see any real gains in power with a "lightweight" pulley anyhow. I would just save your money for some real mods.

 

i just runned 400awhp on pump gas and stock turbo! im installing a ku engi inatke mani.. i didnt knew i have to make so much mods to get it in!! so lets see if i can gain something for the effort im making!