Do you need a tune after installind UDP?

Sleeperstang07 · 11-18-2008

I just bought some steeda underdrive pulleys and I was wondering if i need to tune the car after the install?

TheKurgan · 11-18-2008

Nope just slap it on there and start her up.

**stlwagon** · 11-18-2008

General rule of thumb... If it doesn't affect air flow it doesn't require a tune.

sleeper108 · 11-18-2008

yeah, you're not adding any horsepower, just freeing some up. no tune needed

hotshot · 11-19-2008

how hard is it to install an UDP? I heard you need a belt tensioner and some fancy stuff. I was planning on a UDP but the install kinda turned me off from this mod

TheKurgan · 11-19-2008

Quote:

Originally Posted by hotshot

how hard is it to install an UDP? I heard you need a belt tensioner and some fancy stuff. I was planning on a UDP but the install kinda turned me off from this mod

Belt tensioner comes with the car. You just need a 1/2" socket wrench to free it and the belt comes right off. It's a pretty straight forward install with no special tools needed.

sleeper108 · 11-19-2008

Quote:

Originally Posted by TheKurgan

Belt tensioner comes with the car. You just need a 1/2" socket wrench to free it and the belt comes right off. It's a pretty straight forward install with no special tools needed.

3 jaw pulley (gear) puller and a impact wrench will go very far on this install. extremely useful

Steeda Underdrive Pulley install (with pics) - MustangForums.com

i used that site, and it worked very well for me. although i did need a brass piece to make the bolt on the gear pulley go a little further. otherwise the bolt would have never seated and it would have never come off.

I had ABSOLUTELY NO experience working on cars when i did this, and got through it fine. i did my CAI, tune, and axle back while i was at it too.... good weekend

**stlwagon** · 11-20-2008

Get a Chrysler 3-jaw puller from Autozone. Works like a champ. You'll also need a harmonic balancer installer.

07StallionGT · 11-20-2008

what are the gains from this mod? any bad side effects of it ?

sleeper108 · 11-24-2008

Quote:

Originally Posted by 07StallionGT

what are the gains from this mod? any bad side effects of it ?

you dont necessarily "gain" but you will see 10 more HP at the wheels. no bad side effects, unless you plan on going F/I in the future, in which case you should stay with the stock pulleys (right?)

**stlwagon** · 11-24-2008

Quote:

Originally Posted by 07StallionGT

what are the gains from this mod? any bad side effects of it ?

Not sure if there's a direct link but my alternator eventually failed.

hotshot · 11-25-2008

My mother's battery on her espace died the other day but it was not from a weak alternator, it was from her driving habits. She would turn the car on, drive the 1 mile to work, then turn it off. Get in, drive 1 mile home and turn it off. Eventually the battery died because the alternator never had sufficient time to charge the battery. Not to mention the engine never gets a chance to actually warm up. She had the car since March and has 1,200 miles on it. She should belong to Mr V's PPR with that kind of mileage

six5mustangfan · 11-25-2008

Quote:

Originally Posted by 07StallionGT

what are the gains from this mod? any bad side effects of it ?

As I understand it if you have a shaker 1000 stereo then you should not get pulleys because it takes too much power from the stereo.

smokeshow · 11-25-2008

A friend of mine and I just installed the Steeda UDP's last month. He's a lot more experienced in working on engines than I am, but, having done it once with help, I think I could do it again by myself. So, if you have a friend that you can bribe with a case of beer to help (or even to hang out and give you a second opinion!) it definitely goes alot more smoothly.

The tutorial that sleeper108 linked to is the main one we used, but I read through a bunch of different ones, plus the Steeda install instructions beforehand.

An impact wrench definitely makes the job a lot easier. I wouldn't want to have done it without one.

One part that I ignored in the instructions that I shouldn't have was the part about disconnecting the battery. The pulleys ran fine for a few days, and but at one point, I hammered on the car and the check engine light came on. The codes indicated a misfiring cylinder. Someone else on a different forum had had the same issue, and they also hadn't unplugged the battery. I unplugged, and let it sit, and haven't seen the CEL since.

**stlwagon** · 11-25-2008

Quote:

Originally Posted by six5mustangfan

As I understand it if you have a shaker 1000 stereo then you should not get pulleys because it takes too much power from the stereo.

Not really true but if you have anything larger it might be an issue.