Well this is not your typical FICM tuner vs PCM tuner. I have researched a lot on the subject. First I want to list the things I do know, and then maybe someone can fill me in on the things I dont' know.
Things I do know:
- Huge increase over stock tuning
- Slight increase if you already have a big PCM tune (SCT Tune)
- Inscrease throttle response
- Dyno proven to increase power
- Raises egts significantly
- cannot tune anything except the FICM (not tranny, turbo, etc...)
- Has the possibility of increasing fuel mileage
- Some report smoother idle
This link to the gopowerhungry website has a ton of info and is good for reference. It shows dyno graphs, talks about how Ford reprogrammed many trucks and made the trucks slowy, run worse, and get bad fuel mileage. It shows many different combos of how it increases power over stock.
Power Hungry Performance - FICM Reprogramming
Things I don't know:
- What exactly a FICM tuner does
- What parameters a FICM tuner can adjust
- Does a FICM tuner adjust the pulse width
- How exactly it changes the power
What I have been able to research so far is just he results of FICM tuning, not the cause for the results. I would like to know exactly what it is doing to the FICM that an SCT tuner can't do???
These questions have come about because I have been looking into injectors, nozzles, pulse width, tuning, timing, cylinder pressure etc. I have also had the injectors apart and I was surprised as to how simple they are. What I mean by that is there is not too much that affects the fuel except the pulse width and hpop pressure (fuel pressure and nozzles affect it but are not part of my thoughts) so what exactly can a ficm tuner adjust to make things different? Is it simply making the pulse width longer, faster, harder??? which in effect advances timing, which when combined with stock nozzles and an extreme tune it sounds pretty dangerous. These questions might sound dumb and that is because I am not educated on the subject and have not been able to find the right info to edumacate my self.