Originally Posted by Gasquatch

I know absolutely nothing absolutely nothing about DIY tuning. I've always been able to bolt in my own powermakers then take my cars/trucks to a dyno and have a pro make them all work together for more ponies/efficiency.

Since getting into this bloody EEC-4 speed density stuff, I've found it impossible to get anyone to tune my truck. As mentioned in this thread, they all tell me to convert to MAF and come back. Just seems silly and unnecessary. So, knowing full well I'll be completely lost and likely break my beloved F250 if I tune it myself, are there folks out there the provide/sell "off the shelf" tunes to be punched into a tweecer or quarter horse, based on provided engine and upgrade specs? Sort of like PCM for less does with LT1 OBD1 and ALDL cars.

I'm savvy enough to install all the hardware, and run the programs, I just wouldn't know what to change, what to look for after, and why.

OR if anyone knows of a local EEC-4 speed density tuner in the greater Phoenix area, that would be fantastic!

Originally Posted by frederic

You don't have to, but it's probably the path of least resistance for you considering all the info and help you'll have access to once you do it. I personally think the big benefit is you can play with lumpy cams and the MAF system is very tolerant. Speed density, because it measures vacuum, won't be very happy.



If you don't want to weld a sensor bung onto your exhaust system, there are no-weld o2 sensor bung kits available. Basically, it's a wide exhaust clamp that goes between two sections of pipe and has a bung centered in between. That might make this part of the job easier for you.

I've seen them in 2.5" and 3.0" sizes and because they're adjustable downwards, that covers 2.25-3.0" diameter pipes well.

Hope that helps.

Originally Posted by Krisverde

I heard good things about AZ Dyno Chip in chandler. Ill probably be taking my truck to them soon.

Originally Posted by 85lebaront2

At least you have someone, my nearest shop that speaks Ford is clear up in Northern Delaware, about a 6 hour round trip.

Originally Posted by 73FOMO

For now I only know of Conanski (Paul) and I with onboard tuning devices, but hoping to find other users. I am sure there are others with custom tuned chips. I have started this thread with hopes of encouraging some discussions around the "mythical black art" tuning on OUR trucks eec (electronic engine control & in some cases transmission controls) and maybe just to help others learn a little bit more about tuning and fyi info on our trucks. I am no expert but I will layout what I know. The great thing about eec tuning is that is a whole lot like tuning in the old days, except it is much, much more precise and flexible and you don't even get your hands dirty. Some spend days figuring out the right jettings, accelerator pumps for carbs and then even more time playing with base timing and figuring out the timing advance, but with electronic tuning all of this is magically contolled by a little box and can be altered with some keystrokes from your laptop sitting in the cab of you truck and many, many combinations can be tried quickly with the correct devices. It doesn't have to be intimidating!

I will be adding to this thread as I can but here are some basics definitions to begin with.

EEC - Ford Electronic Engine Control a.k.a (PCM). Consist of the computer, but also important are all the sensors that report back to the EEC. I.E. Maf sensor, ECT sensor, ACT sensor, TPS sensor, Knock Sensor among others.

J3 Port - An unused port that can be found on the side of your eec (pcm) box. Usually has a plastic plug covering the opening.

Strategy - Definition that the truck operates on. Just think operating system. a.k.a. (box code, catch code). You can cross reference from your Binary Code to find what strategy operates your particular truck.

Binary - Calibrations that are assigned in the strategy (definition). These are the actual numbers that will be adjusted during tuning. This will include fuel tables, spark tables, maf flow transfer flow numbers, injector sizing, idle settings, and even transmission shift pressures and shift points on eec controlled trannies. a.k.a (calibration, tune file)

Custom Chip - Computer chip that is plugged into factory J3 port. Tune cannot be calibrated real time. Requires removing to write the tune. Several different mfg's of chips available.

Tweecer - Device that plugs into factory J3 port used to make calibration adjustments and data log vehicle performance. Can be made in real time on the fly. Comes with own editing software. Data log requires wideband o2 sensor and controller.

Quarterhorse - Device that plugs into factory J3 port used in conjuction with Binary Editor software to calibrate changes on the fly and datalog vehicle performance. Data log requires wideband o2 sensor and controller.

Data Log - Basically a recording of actual readings from your vehicle while running. Data is used to fine tune your calibrations. Without a data log, it's just guessing. Requires wideband o2 sensor and controller.

Wideband o2 - Device that is capable of reading a wide spectrum of exhaust gases to determine air/fuel ratio. (in my own uncomplicated terms).

Hopefully this will help "break the ice" for those looking to Tweak their trucks performance!

More to come!

Originally Posted by Jim Bruns

Time to bring back this post I've got a 95 f150 5.0 E303 cam gt40p heads and the 4r70w Trans with 373 gears

Originally Posted by 85lebaront2

First question, was the 1997 a mass air flow system or a speed density system,.