I some questions???, help??? Options

[celimanST]

I was looking through the parts database and founds some parts that don't much about:
1)overdrive power pulley kit
2)adjustable cam sprocket
3)underdrive crank pulley

At the risk of sounding stupid what do these do???

William

[SpedToe169]

1) Reduces parasitic losses due to accessories by putting bigger pulleys on them and turning them slower.

2) Allows you to change the cam timing. Note: The 7a cams are geared together, only one of them is turned directly by the crank, therefore you can only adjust them both together, which probably won't get you anywhere.

3) Same as 1) but uses a smaller crank pulley to do the same thing. Not recommended to be used with 1) because your stuff will turn too slow and not work right.