whats a under-drive pully do exactly?
Registered!!
Joined: Oct 2002
Posts: 1,592
Likes: 0
From: San Diego, California, USA, Northern Hemisphere, Earth, Sol System, Spiral arm of the Milkey Way
Rep Power: 0 
The underdrive pulley is a replacement crank pulley for a car. The crank pulley drives the accessories on the car, such as A/C and alternator. The underdrive pulley is smaller and lighter than the stock unit. Because it is smaller and lighter, less energy (horsepower), is used to turn the pulley. The underdrive pulley *does not* produce horsepower -- it simply frees up some horsepower that was being used to drive the stock pulley.
On the 6th gen civic this pulley is also used as an internal harmonic dampner. If that is the case on the 7th gens as well (as I expect it is) you may seriously throw your engine balance off by changing it out for an aftermarket pulley.
On the 6th gen civic this pulley is also used as an internal harmonic dampner. If that is the case on the 7th gens as well (as I expect it is) you may seriously throw your engine balance off by changing it out for an aftermarket pulley.
Registered!!
Joined: Aug 2002
Posts: 102
Likes: 0
From: Philadelphia, Pennsylvania, US
Rep Power: 0 It reduces the amount of power taken from the engine to run the alternator and power steering. $50 sounds like a cheap price if it is a quality part.
btw - interesting choice for a screen name [IMG]i/expressions/face-icon-small-confused.gif[/IMG]
btw - interesting choice for a screen name [IMG]i/expressions/face-icon-small-confused.gif[/IMG]
... whats up with your name... how u get it? 
Thread
Thread Starter
Honda Civic Forum
Replies
Last Post
Bounddyy
Mechanical Problems/Vehicle Issues and Fix-it Forum
19
Jul 20, 2015 02:42 PM
aZnVoYCe
General Honda Civic Forum Archive.
16
Sep 8, 2004 11:00 PM
