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#1
Sun, November 22nd, 2009, 10:52 PM
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Noise, roughness, and jumps in pressure can cause a touchy or jerky accelerator pedal. Besides, I think that certain MFD becomes inefficient at certain ICP values. I can't say for sure, it's just my opinion.
Yeah, the P1211 codes were a side effect. Actually, the HPOP was forced to work harder ALL THE TIME. With most aftermarket tuning, the ICP is actually virtually unchanged. So when driving normally, the HPOP isn't working harder than stock.
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Tuning, PCM flashing, and burning chips for 7.3s since 2008. Repairing all aspects of 7.3L Powerstrokes for 25 years. Eight 7.3L PSDs in the driveway including a 1994 Crown Vic and 1973 F100/2002 F350. Looking for the next victim. 
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#3
Wed, December 9th, 2009, 11:33 PM
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This is why I need a 20 position chip... I was trying to shorten the PW and raise the ICP by the opposite amount. IE lower PW 10% and up ICP 10% thinking less fuel but better atomization...
I am wondering how advanced of the SOI would be safe at my altitude. wondering if there is a guideline like 1 degree per 1000 feet elevation for example. Now Cody is suggesting the SOI is not a big influence on economy right? I'm trying to get a good fwy econo tune thus I am working in the 1700-2200 rpm range with my mods. Cody, Do you think pulling the MFD down on the low end of the APP would have a bigger effect? the downside is that would affect the whole RPM range at that APP Dave, say hi to Santa for me and tell him I been a good boy(lie) being you live in the same town as him
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DJ Phoenix (my modded) Hi-1200/240Tow/75FS/80DD/100/140SS +Minotaur ASE Master Auto Technician  2001 Ford Excursion 7.3 4x4 Projects. 1970's Hustler and Max II Amphibious ATV's
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#4
Thu, December 10th, 2009, 12:52 AM
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Quote:
 . There is no magic number. Without retyping everything I typed in the SOI thread, I will just say that there arefar too many variables to put a number on it. I didn't suggest that SOI wasn't a big influence in economy....only that there are far more adjustments that can be made on top of SOI to help increase efficiency. Pulling MFD down will do nothing for economy except slow your acceleration for any given physical accelerator pedal position. If you want to accelerate at a given rate, you will be injecting a similar amount of fuel whether or not you're at 20% APP in one program or 30% in another program with a less sensitive pedal. Besides, once you start really screwing with the MFD map, your shift points get out of whack and then you need to adjust them again (remember how shift speeds are based halfway on APP). 
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Tuning, PCM flashing, and burning chips for 7.3s since 2008. Repairing all aspects of 7.3L Powerstrokes for 25 years. Eight 7.3L PSDs in the driveway including a 1994 Crown Vic and 1973 F100/2002 F350. Looking for the next victim.
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#5
Thu, December 10th, 2009, 11:14 AM
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Quote:
 Will do, next time I get outside of the igloo to go and feed my penguins. Just gotta watch out for those polar bears! 
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#6
Thu, December 10th, 2009, 01:29 PM
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Quote:
Cody, do you feel like this would be a accurate way to increase ICP, or is there "a rule of thumb"  when raising/ lowering ICP?
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#7
Thu, December 10th, 2009, 05:56 PM
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Got a joke for you,
Why don't Polar bears eat Penguins????? . . . . . . . . . . . . . . .. . . . . . . . . . Cuz Penguins only live on the South Pole and Polar Bear's on the North...
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DJ Phoenix (my modded) Hi-1200/240Tow/75FS/80DD/100/140SS +Minotaur ASE Master Auto Technician 2001 Ford Excursion 7.3 4x4 Projects. 1970's Hustler and Max II Amphibious ATV's
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#9
Fri, December 11th, 2009, 12:43 AM
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Quote:
Just like those eco-nazi terrorists that think that cows fart and want to pass legislation to tax them....... Cows CAN'T fart.
__________________
Tuning, PCM flashing, and burning chips for 7.3s since 2008. Repairing all aspects of 7.3L Powerstrokes for 25 years. Eight 7.3L PSDs in the driveway including a 1994 Crown Vic and 1973 F100/2002 F350. Looking for the next victim.
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#10
Thu, December 17th, 2009, 07:30 AM
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Quote:
The thing to remember about the ICP/PW relationship is that the pulsewidth is already based partly off of ICP. So technically, if you raised the ICP then the pulsewidth should drop automatically. You shouldn't have to go in and make any further changes. Unless I change the injectors, the main pulsewidth table doesn't get touched. It's all handled elsewhere. Cody... Cow farts. That's funny right there, I don't care who ya are!
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Bill Cohron - The Mad Doctor   Power Hungry Performance - The ORIGINAL in Ford performance tuning... Since 1997! (678) 890-1110 www.gopowerhungry.com - Home of the Hydra Chip, Minotaur Tuning Software, and the new Orion Reflash System for Navistar! Bring back  Windows™ XP and 7. Windows™ Vista and Windows™ 8 is a pain in my a$$!  Windows™ 10 is only slightly less annoying!  Windows™ 11 is garbage!  Much to my surprise, I'm actually quite enjoying Linux! 
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