skinz

I would have to say change you gear ratio. Was thinking abou doing that to mine. I get 14 to 16 no matter how I drive, so who knows if that would work. Mite not for the 4.9

abycat

Hey guys. been lurking around the forum for a bit. Theres months of reading on our GEN of trucks. I have a 94 f-150 reg cab slong box with 4x4 and the 300 I6 and a 5-speed it gets great mileage as far as i can tell. I havent calculated it yet. but for example it gets way better than my old 2.8L s-10, which isnt quite a good example (highly modified)
My f150 has 285,000 km and it doesnt make any bad engine sounds and doesnt smoke at all ever. It sounds like it has 3 kms on it. i throw 10$ in and i can drive it to work all week and do some errands once and a while.
I will calculate it one day for everyone.

I think the guys are right, spark that doesnt ignite fuel is like a hole in your gas tank. a basic or advanced tune up and codes read and fixed if needed will help alot on any engine. Tire pressure is a major one, and im pretty sure a tailgate net or a tonneau cover makes a big diff.

Also i think the gears are also a good and cheaper place to look too. I cant stay in 4th on the highway, its revving like 3250 rpm so i think i have a different gear ratio than some on the forum. So i can use all 5 gear effectively. Anyway keep it up guys and thanks for the cool forum.

mustangGT90210

I already have gotten 18 once or twice, back when I still had 235/75s. Got 31s now and pull in 15-17, normally 17, but if I wanna go anywhere kinda quick, it drops. 3.08 gears do great for gas. But I want 3.55/3.73/4.10, anyone wanna trade axles? Mine's 3.08LS

'89Lariat

Since when have gears been "cheaper"? Cheaper than what, an engine swap? I agree that the right gears can help (they did on my 302) but they were by far the most expensive modification I've done, even including all the suspension work.

Just sayin'.

heathmeador

no it dont, someone been teaching you the wronge stuff, these trucks dont need that much back pressure so straight pipe with highflow cats is fine, if your so concern bout it just straight pipe it and messure the back pressure and compair it to oem specs.

'89Lariat

You already know my 3.55s are available, but it's just the gears. Just let me know...

ProZach

From what I've understood the more flow, the better the high end horsepower but complete loss of low end torque. There was a thread about duals saying to add the X (or is it Y) pipe rather than the H because it creates more pressure for torque

http://www.fullsizechevy.com/archive.../t-303516.html

Never heard what you're saying about straight piping. Can anyone else chime in and clear this up.

Sorry for thread jacking i'm just curious now

heathmeador

[quote=zchpro;639905]From what I've understood the more flow, the better the high end horsepower but complete loss of low end torque. There was a thread about duals saying to add the X (or is it Y) pipe rather than the H because it creates more pressure for torque

http://www.fullsizechevy.com/archive.../t-303516.html

Never heard what you're saying about straight piping. Can anyone else chime in and clear this up.

Sorry for thread jacking i'm just curious now



straight pipe will increase the flow but as long as u dont like run open headers and u still have all the bens in the pipe when it goes over the rear end and stuff youll be fine with back pressure and wont kill your torque, (striaght true duals is what i run on my 5.4) wich a striaght 6 has plenty of torque cuase longer the crank the more natrual torque it will have. Thats why u see all these striaghts 6's out pull v8's.

Y pipe is singal to dual or dual to singal. X is where the pipes cross in a x. With this straight 6 he has he can only do singal to dual which is what i would do. and u really dont see any improvment in performace with the x pipe on V engines.

ymeski56

The best bang for your buck & only one I know of, that increases performance & MPG's at the same time. Ignition system upgrade w/ base timing bump (don't skimp on wire quality. You will regret it. MSD Superconductors 8.5's/Taylor Thunderbolts 8.3's/Ford Racing 9's) And stay away from Double Platinum Plugs, especially Bosche! http://fullsizebronco.com/forum/show...ht=timing+bump

'89Lariat

Is this just because you can't gap them? Is this only relevant when you are running a significant timing advance? I'm interested in a few more details. I typically run single platinums and have considered doubles, so I'm curious.