- Nov 29, 2002
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Cutler03GT said:I recomend Steeda's pulleys, they are S.F.I. approved and unlike BBK's it is a one piece ballancer that replaces the factory one, BBK makes you bolt on a different pulley to the back of the stock one. I have the Steeda's and have had no problems.
Yeah, some thoughts, but some bad advice...BossShinoda9701 said:IMO I dont think U/D pullies are a good idea.
They replace your crank, water pump, and alternator pulley.
smaller crank...ok...put t/a with that and it will run correctly
smaller water pump...bad...less cooling and more heat engine has to disperse
smaller alt.....inbetween...just wont charge battery as good.
If you do get them...keep your stock alt pulley on so you get a good charge.
The only pulley I would change would be the crank and only doing so if I had a programmer/ timing adjuster.
Some thoughts.
twogts4us said:Yeah, some thoughts, but some bad advice...
You apparently know nothing about underdrive pulleys, so please don't give advice. If all three replacement pulleys were smaller, don't ya think the belt would, like, fall off??!?!? And smaller pulleys would mean the device they are attached to would actually spin faster given the same engine speed.
The truth of the matter is, Steeda U/D pulleys are proven to make power, even with SN-95s, though not as much as they did with the 5.0 motor - this is simply because Ford has done a better job of engineering the OEM pulleys. The crank pulley is smaller, but the water pump and alternator are larger. The way underdrive pulleys add power is that they reduce parasitic drag on the engine. Drag, or friction, is created by engine accessories and by slowing the speed of the accessory drive belt, the accessories spin slower, thus reducing friction or parasitic drag. The result is increased power to the wheels.
manicmustangman said:Are there ANY negative side effects to installing these pullies? I was looking on Stangnet's partshopper and it said this about them, "These pulleys slow down your accessories about 25%, reducing the drag on your engine. They can even bump up gas mileage." What does the mean about slowing down the accessories? And does that mean that these pulling will INCREASE your MPG? I always thought they decreased it.