ok i posted earlier that i converted my 99 crew cab 2wd to a 4x4 and replaced the motor to a pi heads and intake. What can i do for more power without putting in a diesel motor,and do i need to buy a new pcm to recieve the h.p or will a tuner take care of that? let me know what you guys think.

 

I have a 2001 F250 Super Crew with a 5.4 that's 2WD. I see that you changed yours to a 4x4. Was that a major pain in the butt job, or was it easy. I would like to do that to mine, but I don't know if it's worth it. Thanks

 

A Tuner would help as would a high flow muffler.

Considering that you're willing to do major work like a 4x4 conversion you might consider either adding a supercharger to the current engine or pull a 3v or 4v 5.4 from a Lighting or (I think) a Mach 1 Mustang.

Feel free to correct me.

 

well it was not to hard i pulled the motor and trans for replacement so the front of the truck was empty but you could do the conversion with it in. i was working on the truck after work and some sundays and i did it in couple months i put a dana 60 front end with leveling kit manuel transfer case and i bought the housing for the trans and tail shaft and converted it.

 

well i guess i would say it is as hard as pulling a motor and trans.

 

i know i need to get pics up here but i am retarted when it comes to making a post on here let alone getting a picture on here

 

Hybris is right - you're not sticking with stock exhaust are you?
I put a 3" Magnaflow on mine and a K&N cold air intake and it's really opened the engine up. I don't have any dyno test or anything, but the seat of the pants difference was quite noticeable immediately.

The part numbers are listed (for Jane) in my Garage if you need them.

Also there's a pretty well known guy here in the forum - Mike I believe is his name - who runs 5 star tuning. You can look them up on the web at 5startuning. I have not invested in a tuner yet, but he's thought of pretty highly in here, so if I were considering a tuner, I'd at least see what he had to say.

I think he may have recently posted a thread with some dyno pulls and a tuner on a new 2011 - I'll see if I can find that and send you a link.

 

try this link - it's another thread here in the forum

https://www.ford-trucks.com/forums/9...ith-video.html

if it doesn't work you can search this forum using keywords: "2011 6.2L arrived today"
and that will get you to the thread
could help you out on the tuner question . . .

 

well i will have to put a muffler on it but what about cutting the cat off will i see that much power increase it has 175,000 on it.

 

well I have no experience to speak from with that one - I know Johnny Law might have something to say about it, though.

if you're in a state with emissions testing it would be even harder to get away with something like that - it may be a Federal reg and not worth the risk.

my neighbor runs a muffler shop and has done so for almost 40 years now. He fabbed up a custom full dual exhaust for my 86 F-150 and put the Magnaflow and 3" tailpipe on my 03 SD. We went with an aftermarket cat on the 86 and retained the factory cats on the 03 (109,000 miles). His reasoning (besides legal issues) is that these modern vehicles have so many sensors and are so heavily computerized that it's really not worth the trouble to try and do away with the cat. He's old school though, so you may get a different take from somebody else (younger).

If I recall correctly there are 3 cats under trucks like ours: 1 on each downpipe coming off the manifold on each side and then a third right under the passenger seat. I can't remember how many sensors I counted last time I looked but I'm pretty sure there are at least two if not three.

An option you may consider is using a high-performance cat. I know Magnaflow and Cherry Bomb have these available. (Theory being, one can see some performance gains while still meeting legal and vehicle computer requirements.)

For me in the end, every decision comes down to the bang for the buck. My neighbor is a real straight shooter and won't spend his customer's money on upgrades or repairs that aren't necessary. His view was it wasn't "broke", so we didn't "fix" it. If he thought the factory cats were junk and needed to go, he would have told me so right away. No doubt.

 

well the truck made it there and back towing a 7ooo pound camper 250 miles round trip. i would like to get the hp up and get the rpms down a bit so the motor isnt working so hard. at 70mph the tach was at 3000 rpm, i have a 410 gear should i go to a 373 or stay because it would kill what little power i have. thanks for the input if you have any oh as much as i dont want to i have to have my wife put up some pics.

 

I put a Magnaflow cat-back on my 5.4 F150 and it didn't do a damn thing. Except cost me $800.00

 

OUCH! $800 sounds awful high . . .

did that include a resonator or something? or was that a dual system with 2 pipes, 2 tips and 2 mufflers?

I only paid $350 for my muffler, tailpipe and tip installed - which essentially is all that a cat-back is. And you can move more exhaust through a single 3" pipe than you can dual 2" pipes.

I will agree - (now that I think about it - I wish I'd thought to mention this in the earlier post)
I DID see a clear power gain when we upgraded to the Magnaflow 3" exhaust; but I admit it was modest, not dramatic.

The key point here is this:
When we installed the K&N cold air intake - the COMBINATION of that with the exhaust is what really opened my engine up. I don't think significant power gain will come from either one just by itself.
I'm convinced it's the pair together that made such a night and day difference. The engine runs smoother, actually seems to shift better and has more power. That's been my experience.
All I can say is what I've seen; and doing BOTH those things together cost me less than $650. I consider it well spent money worth every penny.

 

Duals...resonator, nufflers, pipes, tips, etc. I didn't install it either. It was a welcome back gift.

 

if i was to sell my gas 5.4 99 f-250 crew cab long bed that has nitto tires and eagle alloy wheels truck has 176,000 miles just put brand new ford take out motor new trans and transfer case and drive shaft truck body is a 7 out of ten what do you thinki could get. if i was going to go with a diesel.