Underdrive Pulleys
 

Just wanted to know if underdrive pulleys made an improvement on HP and how hard they are to install.

RE: Underdrive Pulleys
 

Are you referring to the Crank pulley? Pepz change their pulley for a lighter one.. from few pounds to few ounce, won’t increase your hp, but would ease on motor rotation so its’ respond a little better. If this is what u looking for, get a lighten fly wheel too, just something to start with. Installation is not that hard.. but would def. need some power tool to remove the crank bolt.

RE: Underdrive Pulleys
 

Well, Is this your only way to make power at this point? If not, id sink money into something else.

RE: Underdrive Pulleys
 

emmmm...i have heard a couple rumors not to combine lightened flywheel with underdrive crank pulley. Cant remember reason. Anyone else heard this, know reason?

RE: Underdrive Pulleys
 

balance of the rotating assy gets thrown off...if you have a harmonic balancer crank pulley - leave it alone.

RE: Underdrive Pulleys
 

ok im gonna lay it down for you. I just got ride of my megan racing crank pulley. I had to use a 5 foot breaker bar with a chain wrench to get the bolt out. i didnt feel one bit of a difference in reving or power. DONT WASTE YOUR MONEY