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Cold Air Intakes worthwhile
IMHO it's a coin toss at best.
An improved air flow one end of the system means little without doing anything at the other end. You can't ram more in, than the exhaust allows back out.
In my own toy, errr, ummm, I mean truck, a Ford PSD, I did both ends, a K&N at the front, and a 4" mandrel-bent SS exhaust from the manifold back with no muffler, just a resonator. (A little re-programming occured too.)
It does NOT need one of thoise "boom, boom things that goes in the trunk", above about 1,750rpm it stats getting a little throaty, from about 2,750 up to the governor it can best be described, and is by my neighbours, as "jet wash"......
The $250 air cleaner is a waste of his hard earned bucks if all he's going to do to the truck is that. It won't do much for sound, improved gitty-up-go, or mileage.
I'd be willing to bet he'd be a LOT happier with a $250 stereo in his 'new' ride.
Best of luck.
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Cold Air Intakes worthwhile
AC5ZO raises an interesting point, fuel economy.
Before I started tinkering with my Ford PSD, it pretty consistently got 15 mpg around town, and 18 mpg on the highway, after changing the exhaust, intake box and some re-programming it now gets 18 in town and 21 or 22 on the highway, roughly a 10% increase in economy.
I'm told this is due to increased efficiency resulting from optimizing the performance.
I suspect a lot of mechanical engineers are over-ruled in the design process by stylists, bean-counters and environmental requirements during the design and manufacturing of a vehicle these days.
I don't think 'souping up' a gas job would do the same thing at all.
I have a friend who runs a family trucking business, he maintains VERY meticulous records on his fleets economy, he swears by synthetics and says he has proven that replacing every fluid in a highway tractor will result in a 9 month payback period and about a 7% savings from then on in fuel, and about 20% in maintenance and break-downs.
Best of luck.
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Cold Air Intakes worthwhile
It's kind of like those Visa card commercials.
To see the look on peoples faces when a dually 4x4 that weighs 4 tons eases past them at the lights is, as Mike put it, "delightful" .....
When they see the tandem trailer and 40hp tractor passing them too, that is "priceless", to say the least .....
The improved mileage I (usually) get is entirely dependant on my right foot, and in direct relation to it's position, the farther down my foot goes, the farther down my mileage goes..... but it's worth every drop of recycled dinosaurs.
I have definitely been guilty of leaving the odd jerk 'in a cloud', literally ......
Best of luck.
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08-05-2005, 08:31 
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