Personally I think it's worth it at some point 
underdrive crank pulley ???
It's likely not a lot of power on a stock engine, but it's obviously a lot more when other things are added -- just like anything else.
I noticed a quicker-revving engine more than anything else; however, I just have a lid and ported throttle body aside from the pulley.
I noticed a quicker-revving engine more than anything else; however, I just have a lid and ported throttle body aside from the pulley.
TECH Addict
Joined: Apr 2009
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They might add a few hp. Just like an E-water pump, roller rockers, ported tb. The little things add but it all comes down to what your goal is any how much you want to spend. I just bought heads/cam and called it a day. At some point you have to be happy w/ how fast your car is right? 
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The harmonic balancer or dampener are not ran for power "gains" (which I say loosely). On the other hand, just a basic underdrive crank pulley is for power "gains" (again, stated loosely). This is where one sees the difference in price between a Powerbond vs. an ATI.
