Has anyone really tried any of these pulley upgrades, and if so do you really see a difference? thanks
http://ecstuning.com/stage/edpd/page...ategory=Engine

 

in theory, it should make a slight difference. less rotating mass should equate to a quicker revving engine, but whether or not you'd feel it is debatable. a guy I used to work with had an underdrive pulley on his sentra se-r, and he had alternator issues with the car after he did it.

 

i herd not so good on our cars. something about vibrations and messing something up. when im more sober ill expain better

 

i added the underdrive pulley when i did my timing belt kit. i didn't get any vibrations, seems to rev a little easier, but mang was it a b*tch to get on.

 

Ok thanks all!

 

yeah I have the lightweight crank from ecs with the timing belt kit ... no problems been on for 6K miles

engine def revs quicker and teamed up with my other mods I think its a nice upgrade if your going to be doing timing belt other wise dont too much pita for just that

also do a purems snub mount ..nice strong shifts

 

thanks