Newb with questions (SCT, boost, etc) - Ford Powerstroke Diesel Forum
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Old 02-15-2009, 05:13 AM Fanatic

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Newb with questions (SCT, boost, etc)

Hi guys I new to Powerstroke diesels, but not to turbos or performance cars. My new work truck is a 2005 F250 SD 4 door with the 6.0L. I got it last week and immediately got online and started reading about it. Through my research I found my my SCT livewire (part# 9600) borrowed from my 2007 Mustang GT seems to work on my truck too! Yesterday I loaded the "performance tune" and jeez what a difference. Anybody know what exactly the tune changes? I know on my mustang it changes the timing to take advantage of the higher octane gas as it only runs 89 octane on the factory tune. But I'm puzzled as to what changes can be made on the truck since it's my understanding that there's no real timing to change or worry about. SCT doesn't seem to up the boost either so I guess I'm just trying to understand what changes SCT has made and how they affect the truck.....aside from the tranny stuff.

Also, in conjunction with the SCT performance tune can I raise the boost? Or am I looking for trouble? Can I borrow a Greddy Profec B (electronic boost controller) that I have set aside for my other ride, an 84 mustang SVO. Or should I just disconnect the wastegate like others have mentioned? I'm just worried about running MAX boost with the SCT tune. Maybe down the road I'll add an exhaust and intake but right now I'm just utilizing components that I already have. Any info would be much appreciated.

Oh yeah, I took the truck to a CAT scale yesterday, It weighed 7740 lbs. If I take out weights of me, fuel, and other crap that was in the truck (I weighed everything on a scale that I took out) I get a curb weight of roughly 7370 lbs. Is that about normal for a 4 door. Thanks guys for any info given.
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Old 02-15-2009, 12:58 PM
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Primarily the tuner will increase fueling, and cylinder pressure and ups the ICP, along with other PCM and TCM tweaks.
The SCT already adjusts the boost levels, no need for a boost fooler. I would highly recommend custom tuning for your truck from a reputable writer. It will be a huge difference over the pre-programed tune files. Also as an FYI ,your turbo does not have a wastegate, it uses variable vanes to control backpressure and boost levels. Weight sounds about right to me.
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