Horsepower
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Senior User
Joined: Mar 2003
Posts: 306
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From: Mobile, ALABAMA
Horsepower
ive got a 90 f-150 w a 302 running true duals k and n filter and 383 gears....looking for something off the wall maybe cheap to make it pound the pavement better...any ideas?? 
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Senior User
Joined: Mar 2003
Posts: 306
Likes: 0
From: Mobile, ALABAMA
Horsepower
thx for the info mike.....i was thinking of getting some pulleys, thats about 15 hp and getting/making cold air intake systems, another 15+....i think ill notice a major diff..... 
Elder User
Joined: Mar 2000
Posts: 725
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Horsepower
No problem , yeah pullies make a noticable difference in power and they're cheap too . I just bought a K&N and cut the bottom off the air box to make my own air intake system.
There really is no limit to what you can do with these engines they respond pretty well to modifications.
Keep on truckin' ...Mike
. I just bought a K&N and cut the bottom off the air box to make my own air intake system.There really is no limit to what you can do with these engines they respond pretty well to modifications.
Keep on truckin' ...Mike
Junior User
Joined: Aug 2003
Posts: 64
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From: canada
Horsepower
if you off road don't try this but for a steet truck its pretty sweet. do the old ram air that hot rodders did. make an airbox and run some dryer vents to the grill making a hidin ram air set-up. it might be worth 19-15 hp fo about 5 hours work and under 50 bucks
Senior User
Joined: Apr 2003
Posts: 112
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From: Northwest Arkansas
Horsepower
The pulleys that they are refering to are underdrive pulleys. Basically they are oversized pulleys that go on all your engine accesories such as A/C, water pump, and alternator this causes these items to spin slower causing less parasitic drag on the motor thus giving it more power.
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Elder User
Joined: Mar 2000
Posts: 725
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Horsepower
My underdrive pullies are considerably smaller than the factory ones. I bought an overdrive alt. pulley to help with charging at idle it was 1 3/4" vs 2 1/2" stock. Like mentioned in the previous post the pullies slow down the water pump, smog pump, power steering and the air conditioner reducing drag on the engine to increase horsepower.
For the money they are a good engine mod, easy to install and a decent power return .
Keep on truckin' ...Mike
For the money they are a good engine mod, easy to install and a decent power return
.Keep on truckin' ...Mike
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Postmaster
Joined: Apr 2003
Posts: 2,703
Likes: 4
From: Harrisburg, NE
Horsepower
k&n, true duals, good place to start, after the cold air and pulleys i would put on a hotter coil and open up those spark plugs! another big point is making sure the truck is up too snuff, new plugs, wires, rotor, cap, oil and filter, and make sure your running synthetic lube, i prefer the quaker state stuff in the clear bottles, while your at it put the synthetic stuff in your tranny and rearend, well, the trucks rearend.
. Get the pullies you won't be dissapointed, very easy to install