[allanzx3]

Does anyone have a dyno chart with before and after adding an UDP? Looking to see if there is much difference at the wheels. I know it make the most difference in the lower gears but i was trying to see if it was worth messing with.

Also if you do have a chart, can you post up which pulley it was that you used?

 

[crazymechanic]

maybe 3 hp tops. they don't do much of anything.

 

[allanzx3]

They do help a bit down low, Espically in stop and go traffic.

 

[swk110]

I would say the biggest thing for me is being able to drive with the A/C on.

 

[b16sir1991]

They dont "add" hp, they free up the engines ability to make the Hp. They are effective especially, like they said, when the a/c is on. One thing though, if you do run, one, i do suggest that you have a tuner to you can bump up your idle slightly for charging issues.

 

[SlammedZX3WI]

I installed the FC Crank and Water pump pullies. My idle never flucuated or nothing. I don't see why you'd get the most power with the AC on tho...

But, I noticed a difference when I get on it in first with the UDP on

 

[HTP Designer]

I have all 3 FC underdrive pullies and my car will stall once in a while. Not sure if it is the udp or the MSD DIS 2. I installed both on the same day and really didnt feel like uninstalling either to find the problem.

Any sugestions would help I guess. All in all, I am happy with my pullies. I am machining a titanium power steering pully out at the end of this month. We'll see how that goes.

 

[svtguy88]

^^^^How low does your car idle? If the idle is low, I would lean toward the UDP's.

 

[sleepyboy]

Here is a dyno chart it added 3 hp everywhere they don't say how much the flywheel added but it added about the same if you compare dyno charts. I suggest reading all 4 installments of the project focus from there web site I have all the magazines with it too. It has everything a focus onwer with the zetec needs to know in it.

Heres the link
http://www.sportcompactcarweb.com/projectcars/0110scc_project_ford_focus_zx3_part_2/index.html