Steeda Underdrive Pulleys 10 GT???
10-07-2009, 10:24 AM
#1
4th Gear Member
Thread Starter
Join Date: Jul 2004
Location: MD
Posts: 1,589
Steeda Underdrive Pulleys 10 GT???
Hey guys, I have been reading about performance gain by using the underdrive pulleys on the 3v. I remember wanting to do them on my 2v a few years ago but was scared after someone told me, that my A/C would not blow as cool and my lights would dim. Now Ive heard that was a problem on the 5.0 but what about the 4.6 in the summer or winter, are these hard on the car? Will they throw anything out of whack? And lastly would I need to get a tune sent to my Xcal?
10-08-2009, 12:59 PM
#2
Former Sponsor
Join Date: Oct 2008
Location: FL
Posts: 630
Hey guys, I have been reading about performance gain by using the underdrive pulleys on the 3v. I remember wanting to do them on my 2v a few years ago but was scared after someone told me, that my A/C would not blow as cool and my lights would dim. Now Ive heard that was a problem on the 5.0 but what about the 4.6 in the summer or winter, are these hard on the car? Will they throw anything out of whack? And lastly would I need to get a tune sent to my Xcal?
On my old 96 Cobra it had underdrive pulleys. After 6 years with them one day the lights started dimming at idle at night. That was because the alternator output deteriorated from when it was new and not caused by the pulleys themselves. A new alternator solved the issue.
You are right that pulleys causing problems was a 5.0 thing. On 96-newer vehicles that are in good condition there are no issues with them whatsoever.
Gus
10-08-2009, 02:33 PM
#3
2nd Gear Member
Join Date: Jun 2009
Location: IN
Posts: 168
I hate pullies and will NEVER have them on another car! Just as someone told you the a\c doesn't spin fast enough, the alt. doesn't spin fast enough, and the powersteering doesn't spin fast enough. The car will run hotter because the waterpump spins slower. The alt. is the worst as the light do dim at stop lights and the car will kinda idle slower. They just suck! Worst money I ever spent!
10-08-2009, 05:02 PM
#4
1st Gear Member
Join Date: Jan 2007
Location: Stuttgart, Germany (Hometown: Miami, FL)
Posts: 78
I hate pullies and will NEVER have them on another car! Just as someone told you the a\c doesn't spin fast enough, the alt. doesn't spin fast enough, and the powersteering doesn't spin fast enough. The car will run hotter because the waterpump spins slower. The alt. is the worst as the light do dim at stop lights and the car will kinda idle slower. They just suck! Worst money I ever spent!
10-08-2009, 05:29 PM
#5
2nd Gear Member
Join Date: Aug 2009
Location: Arizona
Posts: 297
I agree UDP's will only make existing problems you already have more evident. I have put UDP's on almost every car I have owned and plan to with the Mustang too.
Steeda posted a dyno with a 10rwhp gain from just their UDP on their 2010 GT. I plan on getting them after I get my intake and tune.
Steeda posted a dyno with a 10rwhp gain from just their UDP on their 2010 GT. I plan on getting them after I get my intake and tune.
10-09-2009, 10:27 AM
#6
1st Gear Member
Join Date: Jul 2009
Location: CT
Posts: 88
I agree UDP's will only make existing problems you already have more evident. I have put UDP's on almost every car I have owned and plan to with the Mustang too.
Steeda posted a dyno with a 10rwhp gain from just their UDP on their 2010 GT. I plan on getting them after I get my intake and tune.
Steeda posted a dyno with a 10rwhp gain from just their UDP on their 2010 GT. I plan on getting them after I get my intake and tune.
10-12-2009, 03:52 PM
#8
Former Sponsor
Join Date: Oct 2008
Location: FL
Posts: 630
I've owned 4 Mustangs including 5.0's and have had underdrive pulleys on all of them. Won't own one without them (unless it was supercharged of course).
I'm even about to put one on my 2008 Mercury Milan. If they make one for a car I own, it gets a set. Pulleys work.
I'm even about to put one on my 2008 Mercury Milan. If they make one for a car I own, it gets a set. Pulleys work.
10-12-2009, 04:06 PM
#9
Former Sponsor
Join Date: Oct 2008
Location: FL
Posts: 630
Ok...from what I understand from reading just about every post in this section for the past three months is that a tune is specific for your PCM and mods also. Dosn't this mean that you should order your tune after you install UDP's? Or would you get your tunes updated/rewritten from whomever you got the tune from? Does this incur added costs? I'm not trying to be a smartazz, just trying to learn.
