2008-2009 BULLITT The Bullitt is Back!

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Old 8/22/08, 08:43 AM
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UDP

I am told that it is a no no to install a UDP on our 08/09 Bullitts. Some people all ready installed them, without having any problems.
I guess what I need is more input on , If I should or shouldn't do a UDP
Old 8/22/08, 11:28 AM
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What could they hurt?
Old 8/23/08, 08:33 PM
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What is a UDP????
Old 8/23/08, 09:16 PM
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under drive pulleys. slows the rotation of the accessories to free up power but it can lower the accessories effectiveness
Old 8/23/08, 09:25 PM
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Yep, good for .99999 hp. Oh, heck I don't know.
Old 8/24/08, 08:31 AM
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On my 07 Mustang GT I had a UDP on it .
I had it Dyno'd before and after the UDP install. 7 rwhp and 5 rwtq at about 4500 rpm!
Old 8/24/08, 01:44 PM
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I doubt you could even tell the difference with the additional 7rwhp, or could you? Not being a smart a$$ here, just wondered if 7 rwhp is even noticable?
Old 8/24/08, 05:11 PM
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I'm not sure it is noticeable but the dyno doesn't lie. The udp doesn't make power! It reduces the load!
Old 8/25/08, 05:52 AM
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I have heard they give an increase in mpg's. 7 hp probably can't be felt but its part of the total package.... its a start in the right direction.....for some!
Old 8/25/08, 08:14 AM
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I guess we have a 12 percent driveline loss, a UDP, aluminum driveshaft, will reduce the driveline loss percentage.
Old 8/25/08, 10:08 AM
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make sense to me
Old 8/25/08, 10:50 AM
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The noticeable part of the UDP addition for me was the quickness of the rev during driving. I have a short throw and always ****** second...third, right around 6100 (tuned for 6500 redline). Once I installed the UDPs I hit the rev limiter a few times. My timing was off based on my experience without them. I assume if I'm a half second behind on the shift, then the car is 1/2 second faster.

I know 7hp isn't noticeable, but take away 7hp and you'll notice something is missing. I did get better hwy fuel economy and combined with a CAI, tune, UDP, proper tire inflation and cruising in 5th at 67mph I can consistently get 27+ MPG highway.

Now, burning the tires and snatching gears puts me at 20mpg city (to and from work).

20/27 from a 300 Hp car seems reasonable.
Old 8/27/08, 05:32 PM
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I didn't notice any difference after my UDP install other than the backache.
Old 8/29/08, 06:47 PM
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So does anybody know a reason why you can't put them on a new Bullitt?
Old 9/19/08, 01:10 PM
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Originally Posted by ARBO
Yep, good for .99999 hp. Oh, heck I don't know.
Actually probably good for 8 to 10 flywheel HP.
Old 9/19/08, 01:50 PM
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UDPs don't require a tune, and the Bullitt engine is a base GT engine with a CAI and tune from Ford, so since they don't require a tune, I don't see how putting UDPs on the Bullitt would be an issue.

-danny
Old 9/19/08, 02:36 PM
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Originally Posted by pegasusphototx
UDPs don't require a tune, and the Bullitt engine is a base GT engine with a CAI and tune from Ford, so since they don't require a tune, I don't see how putting UDPs on the Bullitt would be an issue.

-danny
The Bullitt engine has a unique dampener.

From one of the Ford Engineers :

The crank damper is retuned for incresed rpm capability. I wouldn't recommend changing it.
Old 9/19/08, 04:50 PM
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That could be costly if something goes wrong. Shake the dice and let it role.
Old 9/19/08, 06:41 PM
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I think a damper is a damper as long as it is of good quality. Ford's are cheap with a rubber insert. Aftermarket is much better made. I would put UDPs on my Bullitt without even worrying about it. Also I have read that the part number is the same on all really late model Mustangs, but I have not confirmed this yet. I will be looking into it.
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