Once again, I need help. Im thinking of putting an underdrive pulley on my 06 GT. First of all, I need to know if this will void my warranty(I have the 3 year extension that I paid 1900 bucks for). Ive heard that it can only be voided if something goes wrong and they can prove the mod caused it. Second, how much RWHP can I reasonably expect to get from this? Third, what affects will this have on my accessories, and how much of an effect? Last, can anyone recommend a good maker to get one from, and can I install it myself. Im pretty handy, and I have a great set of tools, so I think I can, but is there anything that I would need a special tool for? Any help you guys can give would really be appreciated. Thanks in advance.

 

Will it void your warranty? - Only if the part in question caused the direct problem. So for instance, if your battery dies, and your alternator goes kaput because you are running the underdrive pullies, then it's your fault, and you pay for it.
Best idea is to keep the old pullies, and swap them out every time you go back to the dealer.

RWHP - ummm maybe 15-30 will be freed up.

Effects on accessories? - Minimal, however realize that you won't be pumping as much coolant, you won't be generating as much voltage, you're AC pump will run slower, etc. The Under Drive pulley just lowers the turning ratio of all your accessories. So, they all still spin, just not as fast. The slower you spin them, the less HP it consumes.

Good maker? - not sure for the 06 GT, might wanna search the forums.

Special Tools? - might be hard to find a belt if the kit doesn't come with one. But who hasn't made 20 trips to the auto zone trying various sizes of belts until you get one that fits? You may also need a pulley puller/installer (but I haven't looked at the 06 GT's pulleys so I don't know for sure).

 

15-30rwhp for UD pullies??? I would expect closer to 6-10. SHM claims 8hp, so I don't believe that a dealer would short change themselves.

As for the dealer, I originally tried SHM (Sean Hyland Motorsports) as they had the best price.

http://www.seanhylandmotorsport.com/...20Mustang%20GT

 

yeah, 8rwhp is about right. i had ford install mine for me so they are covered under warranty and can not be blamed for anything that goes wrong in my car but i have to keep documentation that ford installed them. i went with the steedas and i like them.

on a side note:

people have been saying that if you put underdrives on your car, then you cant put in a system or anything without it putting extra strain on your alternator and dimming the headlights and stuff. well, i just installed a stereo system including a 1200 watt alpine amp and the voltage and battery juice (technical term) stayed exactly the same and my headlights have not dimmed once.

 

Thanks for all the info guys. Mac10, I wasnt even aware that Ford would do that. Will any ford dealer install them and therefor not void my warranty?

 

Sorry, I didn't know about the HP ratings for the GT, I have the V6 (blah blah, I suck, whatever) and the pulley specs are saying 12.3 HP for the V6, so I assumed you would get more from the GT, I just didn't know how much more. Evidently, you get less.

You think just because the dealer installed the part that it can't void your warranty? Aftermarket products, that cause problems with your engine are not covered under your warranty. Your local dealer might be cool, and will agree that they will cover it because they did the work, but that does not say that if you have to go to another dealer for whatever reason, that they will necessarily help you.

1200 Watt Alping Amp with underdrive pulleys? I HOPE you are running at least a full farad capacitor on that puppy, or you could have problems with your amp, speakers, and/or alternator...

What do you mean your voltage and 'battery juice' stayed exactly the same? Are you saying the amp draw never changed? If so, that means your amp isn't drawing power, and hence isn't working, which I doubt is the case.

However, if you have a fatty system, and a couple farad worth of capacitence, then I'll shut up, cuz you already know what I'm talking about. If not, I'd suggest at least a 1 farad cap to save yourself some headache down the road.

 

honestly dont know the answer to that question. a buddy of my dad's is the service department manager at the dealership and he only charged me $75 to install them and put them under warranty for me.

 

I got mine from www.rpmoutlet.com in one of their kits. The pulleys themselves are made by MotoBlue.

It was said before, but warranty won't cover any problem directly related to the installation of an aftermarket part. However, keep your original pulleys(you'll need them if you ever decide to get a SC anyway) and put them back on if something goes wrong.

MotoBlue says the pulleys provide 8-10 RWHP, but I can't really tell. I bought one of their kits, so I couldn't tell you exactly how much HP I got out of the pulleys themselves.

You can install it yourself if you have the tools needed. It doesn't seem that hard, but it can get frustrating. There's a guide to putting on the pulleys somewhere in the 05-06 section. You can also go to Steeda's website to see their instruction kits. It's pretty straightforward, but the balancer is a pain. You'll need both types of balancer pullers, both a 3-claw setup and the bolt set-up. The factory pulleys use the claw and the MotoBlue use the bolts. I actually couldn't get the claw system to grip the factory balancer so I have to fabricate something myself. It wasn't hard, just annoying and somewhat time consuming.

I haven't noticed any change in my electronics at all. I don't run a high watt stereo or anything of that nature, however, so if you have the upgrade 1200 watt system you might notice something, I don't know.

 

alright StupidTodd,

not your fault and i dont think that you suck b/c you have a v6.

if you read my last post, you will know that i told that guy that i didnt know the answer to that question and that i only have that deal through my dad's buddy's service department.

i have a 1 farad rockford fosgate digital cap and have been installing stereo systems for about 8 years now so yes, i do know what the hell i am talking about...

what i meant was that my battery gauge isnt dropping considerably...sorry that you were looking too much into that one. i am sure that everybody else knew what i meant b/c only a dumbass would think that with pulleys and a 1200 watt system, the amp woudnt draw more power. i was simply stating that compared to my past experience with underdrives and systems in the same vehicle, the outcome wasnt as good. ie. dimming headlights, drained batteries, and alternators going out.

thank you for the suggestion but do me a favor and dont ever try to play me for an idiot again; now if i am taking your post too personally, then i appologize in advance...take it easy StupidTodd.

 

boys, lets not get mean here. LOL. it was just a stupid question.