SCT w/ custom tunes vs FCIM with custom tune - Ford Powerstroke Diesel Forum
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post #1 of 12 Old 10-04-2010, 06:23 AM Thread Starter
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SCT w/ custom tunes vs FCIM with custom tune

Can someone please help me understand the difference? I've tried some searching but I'm not finding an easy to understand difference. Thanks!!!

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post #2 of 12 Old 10-04-2010, 06:27 AM
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FICM tune gives better throttle response and mpg, and a tad more power.

SCT lots more power.

Run both in conjuction with each other and

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post #3 of 12 Old 10-04-2010, 06:32 AM Thread Starter
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So they can be run independently or together. I know that the upgraded FCIM gives more power does that electrical power go to the injectors?

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post #4 of 12 Old 10-04-2010, 06:34 AM
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What Dave said. Basically, a custom tuned FICM (Fuel Injector Control Module) will give you small increases in horsepower, throttle response, and fuel economy. A custom tuned SCT change the majority of the parametes in your engine's programming usually resulting in 180 additional horsepower at the wheels (250 hp stock and around 430 hp with a custom tuned SCT). The SCT program will also change your shift points, shift firmness, etc....
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post #5 of 12 Old 10-04-2010, 07:31 AM Thread Starter
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Good info thanks guys.

I think just one more question. If you start with a custom SCT and then later upgrade the FCIM do you need to get a new custom tune for the SCT?

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post #6 of 12 Old 10-04-2010, 07:32 AM
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What Snake said. SCT tuning does not touch the FICM, it is all in the PCM. The FICM does fine control of the injectors if you will. Reprogramming the FICM will help as stated above. You can do the FICM whether or not you run SCT custom tunes and vice versa.

There is also Swamps Diesel Hot FICM which boosts the output of the FICM to 58v instead of the oem 48v. That should not be confused with programming the FICM. Electronic components in the FICM are upgraded to increase the output. This enable the injectors to fire more rapidly and may also give you a little performance boost. The 58v upgrade is also independent of and programming.
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post #7 of 12 Old 10-04-2010, 07:37 AM Thread Starter
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Ahh ok so the 58v deal is that something that someone looking for a mild / moderate setup would do? Or is that just for the big boys.

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post #8 of 12 Old 10-04-2010, 07:42 AM
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Quote:
Originally Posted by bfrank81 View Post
Ahh ok so the 58v deal is that something that someone looking for a mild / moderate setup would do? Or is that just for the big boys.
Do you tow heavy or often? They don't reccomend the 58V for towing, as it can get pretty hot. And you could definitely run it, it's not just for the "big boys."

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post #9 of 12 Old 10-04-2010, 07:59 AM Thread Starter
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Originally Posted by SickStroke6.0 View Post
Do you tow heavy or often? They don't reccomend the 58V for towing, as it can get pretty hot. And you could definitely run it, it's not just for the "big boys."
Pretty much only a dual axle MC trailer weighs in around ~5K with 2 touring bikes and a bunch of gear. Down the road a few years we are planning to get a camping trailer probably bumper pull but maybe 5th wheel. So anything I do I want to keep that in mind and set it up for towing a pretty heavy load over a long distance.

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post #10 of 12 Old 10-04-2010, 09:14 AM
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Quote:
Originally Posted by bfrank81 View Post
Pretty much only a dual axle MC trailer weighs in around ~5K with 2 touring bikes and a bunch of gear. Down the road a few years we are planning to get a camping trailer probably bumper pull but maybe 5th wheel. So anything I do I want to keep that in mind and set it up for towing a pretty heavy load over a long distance.
Then I would just keep it with 48v. I would still consider PHP's or IDP's moderate tuning. Your towing will not affect it in the future.
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