Is it worth just buying the crank pully for my 93 5.0 for $50, and will I tell a difference?

 

Stick with a 3 piece set. I run ASP ones. Also be sure to get a 1.75" alternator pulley (for charging at idle) and a 905 length belt if you still have the smog pump.

Oh yeah, power wise 8-12rwhp noticable and worth the $100 with smaller pulley and belt.

 

I agree with Hit Man X, if you do use them, do not underdrive your alternator! Lead cell batteries do not live long when they have to discharge frequently. The Mustang pulleys will make your alternator spin so slowly that it will not charge at idle, and discharge the battery. If you don't have A/C, then there's not really any accessory worth underdriving. If you underdrive your power steering, it becomes difficult to steer, and underdriving your alternator wears your battery out. A/C and smog pump are worth slowing down, but if you think about it, Ford spent a good deal of time designing the accessory speed, and it turns the way it does for a reason. I'd invest in an electric cooling fan first, that will make more of a difference IMO. TK

 

Heck I upgraded my alternator to a 130A unit and I still need more idle charge. I have A/C, headlights, and an amplifier on my stereo on and I am ~12.7-12.9volts!

I was going to do electric fans but I have to go to a 200A alternator until I can go with fans.

 

sounds like you oughtta look into using Overdrive pulleys! Seriously, March Performance makes a set that will overdrive your alternator. For me, my original 40A piece still makes 14v at a slow idle with my cd player, headlights, and MSD ignition. The heater/defroster blower gives a hard time though. It still makes 37 amps (peak) after 26 years! I'm going to rebuild it when the time comes, it'd be so dissapointing to replace it with a parts store rebuild that lasts 6 months after 26 years of reliable service.

 

The pulley that I have on the 130A is the one that came with the ASP kit...it is acutally the stock size one!

I have the $30 1.75" one but finding a 24mm impact socket to fit inside of the pulley to install the nut has proven to be a huge task for me. It is really weird...I may just use a chrome socket and hope it won't break...Craftsman and Husky haven't let me down!

With just the stereo on I pull ~13.3volts at idle...as soon as RPMs get over 100 it is just over 14.

I don't undercharge too badly...what I mentioned is with the A/C on Max blow also. I also have MSD 6AL, TFI Coil, and well that's it for aftermarket electronics. My amp is an old but good PPI Art Series and a '99 year Pioneer Premier. Oh yeah I forgot about my Autometer Monster Tach also.

My smog pump is gone too so I run a slighty shorter belt now, don't ask how long it took me to find the correct lenght!

 

Well, I have ac and where is the smog pump located? Should I remove it to gain some hp? If I do, what size belt will I need? I dont think I want to underdrive the alternater cause I plan on putting a decent stereo in it and Ive had problems with charging in the past on my mustangs with pulleys.

 

The somg pump is located right under the alternator. It doesn't gain power by being removed, it was jut in my way as the emission crap it was hooked to was missing. You'd need an 858 length with the 3 piece pulley set.

Please be sure to upgrade that junk 65A alternator to a 130-160A if you already have not.

 

yea but if I underdrive a newer 160 amp alternator, whats the use of getting a more powerful one?

 

Oh I didn't know you already had a larger alternator!

 

I dont have a larger alternator yet till I get my system put in but I put pulleys on my stang and it had a 140 alt. and it was at half charge at idle and I hated it.

 

PM, When you asked why underdrive your high output alternator, you were on the right track. It's just silly.

If you underdrive your pulleys, you'll;

Undercharge your battery. That will make life difficult for the vehicle's computer.

Slow down the water pump and the fan. You'll have cooling issues.

Slow down the power steering.

If you add a high-amp alternator to compensate for the underdrive pulley, you'll;

Undo the reason for the underdrive pulley. The high output alternator will take back the power you gained by underdriving the stock alternator.

Add weight to the front of the vehicle.

Add inertial mass to the rotating assembly of the engine. This robs power.

Spend a lot of money to compensate for the money you spent to try to gain power.

If you take the AIR pump off you'll,

Cause the HEGO sensors to get fouled by unburned hydrocarbons.

Cause the EGR to get clogged by unburned hydrocarbons,

Cause your cats to get clogged by unburned hydrocarbons.

I don't see the advantage of any of this.

 

guess pulleys arent the best way to go.

 

Panteramatt , I've had pullies on my truck for a year and have had ZERO problems, but I am running an ASP overdrive alternator pulley. They make a nice power increase.

I've had no cooling problems even in 105* temps. with long periods of idling. The steering feels just a little bit firmer but I like it that way.




Keep on truckin' ...Mike

 

Ummm no, my Power Steering works fine, my computer works fine, NO cooling problems what so ever, my A/C is fine. I dunno where you got this information from...

You gain 2-3 HP for underdriving an alternator. There is no reason you should still be running the stock 65A, it is weak and prone to fire. One of the first things I did to my truck was upgrade to a 130A unit. Hmmm running a 65A at 80% capacity or the 130A at 40%, larger output is good.

The smog pump deleted doesn't effect my vechicle either...it drives fine with it gone. The smog pump just pumps air into the heads or down to the cat COOLING IT OFF, which is the opposite of the purpose of a cat...it needs to be hot. I pass the sniffer better now with cleaned up emission controls under hood and utilizing my current setup.

If you have never installed and used pullies do not post up your "assumptions" or "heard it through the grapevine" experiences. These misconceptions keep this nonsense up. I have had them on my truck for close to TWO years now and they are fine. I have never heard of any other problems you speak of other than undercharge with a tiny alternator.