GT Performance Mods 2005+ Mustang GT Performance and Technical Information

Underdrive pullies - are they worth it ?

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Old May 4, 2006 | 06:58 PM
  #1  
LordBritish's Avatar
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I'm considering getting underdrive pullies for my 05 GT (Steeda?).

Are they really worth it?

Do you actually notice a difference?

I'll be paying somebody else to do the install.

Furthermore, I need my A/C to be working 100% - live around Los Angeles. Gets hot here in the summer.
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Old May 4, 2006 | 08:58 PM
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Car pulls harder. As it is gettign hot out here, i have had the A/C on for a few days, with no problems.
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Old May 5, 2006 | 06:13 AM
  #3  
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I just installed the steeda, no issues, and car seems to rev quicker
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Old May 5, 2006 | 09:23 AM
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Rev's quicker, just another brick in the performance climb. You cannot beat it, it averages 10 hp, so on sale, it costs you 20 buck per hp. not too bad.

I have them and love them....make sure they replace the bolt as in the instructions on the alternator.

I got a CAI, tune, pulleys.....bout time for some gears...going with 4.10's if the wife ok's it
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Old May 5, 2006 | 09:32 AM
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I am in the same boat as you British, but I am thinking about doing the install myself possibly. I am apprehensive to do the install and was wondering for those of you who have done it themselves; How difficult is the install and what does it require?
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Old May 5, 2006 | 09:34 AM
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Some people on the forums would recomend just to be on the safe side to get a electric water pump since the pump will be spining slower at idle. If the pump is spinning slower at idle for example stuck on the freeway with heavy traffic your running the potential that your car can over heat. Anybody correct me if I'm wrong.
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Old May 5, 2006 | 09:46 AM
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Sal are you saying instead of pullies go with an electric water pump? Or in addition to the pullies? I know in collaboration with new pullies and an electric water pump you need a longer belt but if you just replace the water pump is it still necessary to get a longer belt?
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Old May 5, 2006 | 09:54 AM
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I have heard others post that the temp is not an issue (some live in AZ). I helped do mine and all you really need is a decent gear puller(we used a cheap POS). Mark you belt locations and I even put tape on it to try to hold it in place.

Follow directions and torque the crap out of the bottom pulley. I had to put the car in reverse to get the extra turns after the torque was applied.
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Old May 5, 2006 | 09:57 AM
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<div class='quotetop'>QUOTE(DjSaL @ May 5, 2006, 10:37 AM) Quoted post</div><div class='quotemain'>
Some people on the forums would recomend just to be on the safe side to get a electric water pump since the pump will be spining slower at idle. If the pump is spinning slower at idle for example stuck on the freeway with heavy traffic your running the potential that your car can over heat. Anybody correct me if I'm wrong.
[/b][/quote]

Watch the temp gauge and if needed give the car some throttle. I don't think that will be much of a problem.
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Old May 5, 2006 | 01:41 PM
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I was saying that in addition to the pullies you would need a electric water pump but that's just what I heard. It may or may not be a issue but it is something to consider. What Jason said is correct but what if you are stuck in traffic and you can't move your car much. Your car can over heat since the water pump will not be spining fast enough to cool down the car. It will cool down when you give it some throttle. Allot of people on the forums have bought a Electric water pump when they installed there pullies.
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Old May 5, 2006 | 02:54 PM
  #11  
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I put mine on in Seattle last year, then drove the car down here to Las Vegas, and got through the hottest weeks of summer here without a problem. Steeda pullies, installed by me, no overheating or ac problems at all. Only problem I had was with the slick roads around here, I spun the tires more than I did in Seattle. Not necessarily a bad thing, except on the wallet. [img]style_emoticons/<#EMO_DIR#>/smile.gif[/img]
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Old May 5, 2006 | 03:02 PM
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Do you notice any SOTP difference?
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Old May 6, 2006 | 02:30 PM
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<div class='quotetop'>QUOTE(LordBritish @ May 5, 2006, 5:05 PM) Quoted post</div><div class='quotemain'>
Do you notice any SOTP difference?
[/b][/quote]

Yes!! Revs a lot faster too!!
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Old May 6, 2006 | 02:57 PM
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I'm hoping pullies will put me over the 300 mark at the wheels. Should find out actual gains in a couple of weeks.
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Old May 6, 2006 | 03:10 PM
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Do you need to retune for the pullies?
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Old May 6, 2006 | 03:14 PM
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<div class='quotetop'>QUOTE(GRAYPNY @ May 6, 2006, 5:13 PM) Quoted post</div><div class='quotemain'>
Do you need to retune for the pullies?
[/b][/quote]


My understanding is no, you don't need a retune. Just install, and go.
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Old May 6, 2006 | 08:49 PM
  #17  
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I would like to get more feedback on the pullies. I live north of Sacramento and in the summertime the temp is in the 100's on a regular basis. I don't get stuck in traffic much and my car isn't a daily driver but I would like to hear more pros and cons about the UDP. BTW I found them for $189 if anyone is interested. Not sure if I should post the company name since they aren't a sponsor of TMS.
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Old May 7, 2006 | 05:08 PM
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Graypny, can you pm the vendor name (or post it...). Thanks.
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Old May 7, 2006 | 06:45 PM
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I have a set of Saleen pullies in the parts for sale section if anyone is looking for some.
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Old May 7, 2006 | 11:57 PM
  #20  
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From: Lost Angels
what do you guys think of the MMR pullies?
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