will changing to lighter pulleys change my tune, I'm asking if I change to unorthodox main, alt, water, and power steering aluminum pulleys will it mess up my tune or not?

 

It shouldnt affect your tune.
Just make sure the main pulley has proper timing marks on it.

 

Yeah, make sure it is guaranteed on time before swapping them out, and see if they line up. Many (most?) aftermarket pulleys for 13B's have improper timing marks.

 

i thought the timming was controlled by the CAS? If the main pulley is what does what do the marks look like ive never looked

 

Youll see two notches.

Blue and orange. But ive seen different colours as well.

 

The FD has a trigger wheel on the front pulley... if the triggers are not in the same spot as the one you are removing then the timing could be effected

The FC uses a CAS similar to a distributor which will have no side effects when swapping pulleys out... However the replacment pulleys could have different timing marks, so if you wanted to verify the timng you would need to make sure the marks were in the factory positions