low92, it has 3.55 gear ratio

 

3.55 ain't a bad rear to have. has a reasonable 0-60, but doesn't kill the gas mileage. if you aren't too worried about mileage you could swap out for a 3.73 or 4.10. that'll definately move you off the line faster. (might go thru some rear tires though)

my advice, start simple, see how things feel as you go along. don't know how much you have to budget. a healthy start would be a better intake, maybe some shorty headers, but definately some exhaust upgrades (and who doesn't love those deep gurgling engines)? if you're willing to spend the dough with the intake, maybe a new throttle body. you may find that's just the extra umphf your truck needed. have fun and good luck.

 

Wow, this is a hot topic now anyway, yea i'll defitenly do exhaust and k&n filter im trying not to spend so much since i have an '04 dodge im working on too. i just dont want to leave my good Ford abandoned!

 

yea, I can tell you right now, your not getting no 70 horsepower from exhaust and intake alone. I'd think 20-30horsepower might even be pushing it a little to tell you the truth. True horsepower is so overrated these days, but you could defintly benefit from these little mods.

 

20-30 with col air intake, larger MAf if so equipped and full exhaust done, headers, Bassani Y pipe, 3" mandrel bent, catco or Random Tech free flow cat and free flow muffler ahould get you somewhere in the 20+ range.

I would consider switching over to electric fans too, its a real "feelable" increase in HP. This will probably give you one of the higher bangs for the buck on bolt on improvements for HP.
Wanne go faster? go with a stroker engine, check out my 393 in my gallery ( last gallery) or the 408 Supercharger that was in the Bronco. YeeHaa...

 

I really find it amusing how a lot of the cold air intake kits leave the cone-shaped filter under the hood behind the headlights, where the vast majority of the airflow it gets is from the engine compartment. Engine compartment = hot air.

I've seen some newer kits that have a shield or a box, which is much better, but honestly, you don't need to spend huge dollars on such a kit.

If you want to increase airflow, there is an easy way to do it. Simply replace your airbox with a larger airbox (and larger tubes) with something out of a junkyard. Remember that the F-series is really a "toy truck" as compared to a lot of trucks on the road. Isuzu diesels being the smallest of the "big trucks", and have huge airboxes, for example.

It also depends on the engine. I put an isuzu airbox (which is massive, I must say) into my 351W powered F350 crewcab and didn't notice any increase in power by using my *** as an accelerometer (meaning the seat didn't push me any harder). But then again, a 10-15HP gain (if it even is that) on a 7000lb truck isn't really noticable.

Thats why I'm building a 500cid twin-turbo stroker. I want to feel the acceleration. I figure when I splinter the sterling rear, I have enough power

Anyway, instead of K&N, consider a larger junkyard airbox. Isuzu box trucks are fairly common in truck junkyards, I bought mine for $25, and the filter I got from GM for another $25, though I'm sure even poop boys or auto zombie can get the filters cheaper.

 

Hey Frederic, I'm going to have to go check out those Izusu Diesel air boxes. The Pro-M 80mm MAF with the large open element K&N that we put on the 393 definitely wont fit in the factory air box and you can feel the decrease in power as you get heat soak in 100 degree ambient days.

 

Well, i put the K&N in, and im more impressed than what i thought i would be. My dad had dont changed the air filter ever since he bought it back in 96 . Now when i accelerate, i can really hear that engine growl!