Upgrades and Aftermarket - 99 & up 7.3L EngineUpgrading or adding OEM or aftermarket equipment to your 1999-Up Super Duty or Excursion with 7.3L Power Stroke diesel engine. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.
CRS trick: Make a note, and put the note with other notes of stuff that you may need to "remember" later. Kevin posted a working link, and the part number was in that link, so I wrote it down. Now I no longer need to memorize the number as long as I don't forget where I put that note.
Hopefully the number on the note is the correct one, not the same one you wrote in your post.
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2000 F250 Lariat CC SB 4x4 PSD Auto
So far no problems with the kit. Took about 45 minutes to install.
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2000 7.3L Excursion 4x4, 215K miles, ISSPro gauges, Ford Severe Duty AIS, ART Cryo front rotors and Power Friction pads, WARN hubs, deciding on a tuner....
I don't recommend getting the foam sleeve. I tried it and my air meter gauge still continued to pull in under WOT. It wasn't until I removed the very reduced snorkel extension off of the air box that I could finally see no movement on the air meter thingy under WOT. Some say it lets in too much under the hood hot air if you take off the snorkel. So, if I was to do it again on an early 99....I'd save some money and get the regular 99 AIS kit (not the one specifically for the early 99) and I'd not even put on the snorkel extension at all. My 2 cents worth.
I am going to order the AIS kit for my early 1999 7.3. Losfinch stated he'd order the regular AIS kit. How is the kit different from the early 99 kit, and what is the number for that late 99 kit? Also, Losfinch said he'd "not even put on the snorkel extension at all". I will be purchasing and installing an AIS kit this week.Are you saying to leave off the air intake hose that comes from the grill area, and just have the open hole on the air box front as the air entry? Your opinions are much appreciated, I have no knowledge of these components. Thanks!
I didn't read through every post on the thread, so forgive me if this is a repeat...
When I installed my AIS, the restriction guage would pull about 1/2 with WOT... Instead of removing the snorkel or trying the fender foam sleeve thingy, I trimmed the splash guard (for lack of a better description) that slightly extended over the opening of the snorkel. Now the guage pulls around 1/2 of an indicating graticle vs. 1/2 the whole guage. It may not be the absolute best scenario to relieve all possible flow restriction, but it works good enough for me.
I am going to order the AIS kit for my early 1999 7.3. Losfinch stated he'd order the regular AIS kit. How is the kit different from the early 99 kit, and what is the number for that late 99 kit?
The AIS kits are the same. The difference is that for an early '99, you also have to buy another part
UOM ................Qty Price
XC3Z-9B659-AA Each $35.31
updated fresh air tube-required on trucks built prior to 12/98
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My Sierra Blanca in the sig pic was a great pickup for 11.5 years. I sold it a coupla years ago. I drove a hand-me-down 2003 F-150 SuperCrew 4.6L 2V for a while, but it was unacceptable for towing more than a rowboat. Replacement is a 2012 F-150 EcoBoost SuperCrew Lariat that tows my 5,000-pound TT like a dream.
It has been a while since I installed the AIS on my E99, obviously the price has changed!
I purchased mine from Diesel Power Products and did install the foam sleeve. I decided to use the foam sleeve because the factory air box intake air opening in the fender well was available and I assumed additional air opening surface area couldn't hurt. The rubber "flap" mentioned in the posts does need to be trimmed to provide a clear opening for the snorkel.
The AIS has performed flawlessly, it is a very good upgrade.
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Early 99 (10/98), CC, Dually, LB, Access Cover, ZF 6 w/LUK twin friction disk clutch, 20K Reese Hitch, Ford AIS, Auto Meter Gauges, MagnFlow 3.5 DP w/4inch exhaust, Banks Big Head Wastegate Actuator, MagHytec on Dana 80, Timbrens, DP F6 (No Start, 1200 rpm, 1200 rpm/w EBV, Decel, 40T, 60T, 80T, 60E, & 80E) , 36 foot triple slide 5th wheel (15K), 355K
Sorry, I don't get it. Losfinch stated "I'd save my money and get the regular 99 AIS kit", not the early 99. Is the fresh air tube the hose between the air box and the turbo? If so, could it be used, or does it have the wrong bends, or is too short? With shipping it's an extra 50. Thanks again
No, the foam rubber connecter was not part of the design used in the dusty desert by DoD. As 444-4D stated, it was developed and sold buy an outside party. It sounds logical, but no one has proven that it is better than the original AIS design. I had the AIS on my 7.3L with 60-tow tune, and it worked great without the foam rubber connector.
Not quite so. I searched for the thread, but I guess my results were posted in someone else's thread about cold air systems and air cleaners.
WAAAYYYY back, I started collecting bits and pieces including all 3 versions of the OEM air filters and boxes, some different brands of panel filters (including K&N) to test. When the AIS came (I knew it was coming because I was able to sneak a peek when it was being field tested). I also knew from same engineers that it was going to be one bad-ass filter AND airbox. I also was curious about the ZooDad mod (fender air intake sleeve).
I tested all versions of air systems with and without filters. I started using my Edwards barocell equipment (very large, very expensive and not conveniently portable in my single cab - but SUPER high resolution - down to one millionth of an atmosphere) against a very sensitive air filter vacuum gauge. Much to my surprise, the differences were so great, I could easily read them with the filter restriction analogue gauge, and the barocell was SO sensitive that it confused the data because of the sensitivity to how and where the pressure was being tapped to the barocell.
Long story short (I no longer have the data, but it is still here somewhere in a post about air intakes) the most restrictive thing of all was the original, standard housing with the skinny filter (that would collapse under airflow and dust the engine if it got loaded with enough filtrate to restrict flow - guess how I found that out). The stock airbox itself was VERY restrictive. The oft-hyped K&N didn't improve pressure at all measurably in that box, at least not beyond the later, deeper pleat elements in the box with the support (to prevent collapse). The fancy aftermarket cold air intakes DID flow significantly better, IIRC about as well as the stock AIS. The Donaldson element in the (Donaldson) AIS made no significant difference in restriction (again, the BOX was he limit, not the element). When I did the AIS with Zoodad, it had significantly less restriction than the aftermarket cold air system (big name "forgotten" to protect the advertiser).
While I was truly thrilled to pieces to have usable data to know I had the best possible airflow, it was finding that the Donaldson blue element (worth over a C-note up here) did not load up enough to move the restriction gauge away from it's normal (all measurements made under full load, full power at 3,000 rpm) home for over 80,000 miles of highway, gravel, farm and construction site use. On top of that, I have seen the filtration data knowing how infinitely superior that hundred dollar element is to anything else available.
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2000 F450 Lariat 4x4 tractor, rebuild at 200k in '12, Air Dog, Reg Mod, HX & HP all in hard SS lines, bypass filter, Banks Power Elbow w/3.5 dp, no intake heat, CCV mod, AIS (w/extra hole), some big Alliant single shots, GP indicator LED, custom 4" exhaust, 4" USG exhaust brake, custom alum. rear diff cover extension (dipstick & temp), Detroit locker, ESPAR D5 aux. heat, custom alum tow deck and fuel tanks, Bushwacker 1 1/2" flares, 9k winch, gin poles, JWSpeaker 8900 LED headlamps in XL grille, Lightforce 240GT (still Halogen, but VERY bright), Hella Micro DE HID fogs, KW = vision plus (Isspro) instruments, more to come & lots of other diesels
Not quite so. I searched for the thread, but I guess my results were posted in someone else's thread about cold air systems and air cleaners.
WAAAYYYY back, I started collecting bits and pieces including all 3 versions of the OEM air filters and boxes, some different brands of panel filters (including K&N) to test. When the AIS came (I knew it was coming because I was able to sneak a peek when it was being field tested). I also knew from same engineers that it was going to be one bad-ass filter AND airbox. I also was curious about the ZooDad mod (fender air intake sleeve).
I tested all versions of air systems with and without filters. I started using my Edwards barocell equipment (very large, very expensive and not conveniently portable in my single cab - but SUPER high resolution - down to one millionth of an atmosphere) against a very sensitive air filter vacuum gauge. Much to my surprise, the differences were so great, I could easily read them with the filter restriction analogue gauge, and the barocell was SO sensitive that it confused the data because of the sensitivity to how and where the pressure was being tapped to the barocell.
Long story short (I no longer have the data, but it is still here somewhere in a post about air intakes) the most restrictive thing of all was the original, standard housing with the skinny filter (that would collapse under airflow and dust the engine if it got loaded with enough filtrate to restrict flow - guess how I found that out). The stock airbox itself was VERY restrictive. The oft-hyped K&N didn't improve pressure at all measurably in that box, at least not beyond the later, deeper pleat elements in the box with the support (to prevent collapse). The fancy aftermarket cold air intakes DID flow significantly better, IIRC about as well as the stock AIS. The Donaldson element in the (Donaldson) AIS made no significant difference in restriction (again, the BOX was he limit, not the element). When I did the AIS with Zoodad, it had significantly less restriction than the aftermarket cold air system (big name "forgotten" to protect the advertiser).
While I was truly thrilled to pieces to have usable data to know I had the best possible airflow, it was finding that the Donaldson blue element (worth over a C-note up here) did not load up enough to move the restriction gauge away from it's normal (all measurements made under full load, full power at 3,000 rpm) home for over 80,000 miles of highway, gravel, farm and construction site use. On top of that, I have seen the filtration data knowing how infinitely superior that hundred dollar element is to anything else available.
The ZooDad mod and the fender air intake sleeve are not the same thing.
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2000 F250 Lariat CC SB 4x4 PSD Auto
The E99 factory air box collected the fresh air through the fender well opening, the tube/hose that connects from the air box to the turbo is a different diameter (at the turbo) than on the 99.5 on.
The AIS uses an air intake snorkel (like the 99.5) and requires the smaller diameter hose at the turbo for the E99. Diesel Power Products modifies the air box by cutting a hole in the air box and suppling a foam sleeve to fit the fender well opening (like the E99 factory box), air is supplied through the fender well and the snorkel.
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Early 99 (10/98), CC, Dually, LB, Access Cover, ZF 6 w/LUK twin friction disk clutch, 20K Reese Hitch, Ford AIS, Auto Meter Gauges, MagnFlow 3.5 DP w/4inch exhaust, Banks Big Head Wastegate Actuator, MagHytec on Dana 80, Timbrens, DP F6 (No Start, 1200 rpm, 1200 rpm/w EBV, Decel, 40T, 60T, 80T, 60E, & 80E) , 36 foot triple slide 5th wheel (15K), 355K
Solve the MYSTERY! 1999 f250 cc 7.3 built 6/98, vin 1FTNW20F5XEB28929 with late air box(has grill back snorkel, no fender air port), 4" air box discharge, what appears to measure(hose still attached) 3" hose size at turbo(Garrett p/n 1825878c91). I bought the truck used, but everything appears undisturbed factory components. The mystery question is: Early or Late 99?
Your truck is an early 99. If it has a snorkel going to the front of the truck, someone has changed the intake. Look at the link in post #24. If your rubber connector looks like the early one, you need to buy a new one. If it looks like the late style, it will work on an AIS.
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2000 F250 Lariat CC SB 4x4 PSD Auto
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