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Upgrades and Aftermarket - 99 & up 7.3L Engine Upgrading 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.

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Old 01-10-2008, 10:57 PM   #1 (permalink)
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best filter set up for a 7.3

I want a filter for my truck and i was wondering what yall thought about them. My truck is all stock except for smoke stacks. I dont have a chip, i just want a intake to help the milage a little. Im leaning toward the k&n pod style filter.
thanks!
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Old 01-10-2008, 11:24 PM   #2 (permalink)
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Re: best filter set up for a 7.3

If you mean AIR filter, probably the best is the Ford AIS. You can get it for $200 at http://www.powerstrokeshop.com who is also a sponsor of TDS. Much more air, much higher / finer filtration.

You can also make one yourself with the right Baldwin filter and some fittings. Look up the do-it-yourself "DIY intake" or "DIY Tymar" or "Tymar setup" with the SEARCH feature on this site. It'll run you about $50.

After that, you'll have to go with the aFe Stage 2 with the good filter (can't remember the name), and it will run you $400-500. Don't get the cheaper setup of the Stage 2 with the lower quality filter.
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Old 01-11-2008, 12:06 AM   #3 (permalink)
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Re: best filter set up for a 7.3

You can get the Donaldson filter through Amsoil for less than $40, I've got 2 PVC fittings and the filter and don't have any complaints other than it's a little noisy in the cab, a little noise suppression cloth stuff should take care of that.
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Old 01-11-2008, 12:07 PM   #4 (permalink)
 
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Re: best filter set up for a 7.3

Never use a K&N. Bets is either a Tymar or Fords AIS period. All the rest are second and just add bling and lighten your wallet.

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Old 01-11-2008, 02:44 PM   #5 (permalink)
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Re: best filter set up for a 7.3

hands down afe Stg. II with the dry filter!
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Old 01-11-2008, 03:50 PM   #6 (permalink)
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Re: best filter set up for a 7.3

2U2Z9K635AA Each $198.19
7.3L Power Stroke Diesel AIS Severe Duty Filter Kit FA1759

http://catalog.powerstrokeshop.com/p...&siteid=214083

If you want the absolute best that you can get for your application, then Ford AIS part# FA1759 is what you want.

The AFE costs around $400 and would only be any advantage at all if you have lots of modifications to make around 400 or more hp.

If you can't afford $198 for the AIS, then some type of diy tymar is the next best thing.

http://rides.webshots.com/photo/2427...89393685lCUeep

Here is a series of photos that show a simple way of doing it. There are a lot of variations on exactly how to do it.

Here is the filter that you use. Order from fleet filter.

Wix # Napa # Description Price
46637 6637 Air Filter $27.33


http://www.fleetfilter.com/SearchResults2.asp

You can use PVC pipe or exhaust 4" pipe plus a couple of clamps.

Don't use K&N filters. They have been tested and found to let in tremendous amounts of dust that quickly destroy your turbocharger.
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Old 01-11-2008, 06:15 PM   #7 (permalink)
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Re: best filter set up for a 7.3

Ford AIS
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Old 01-16-2008, 07:26 PM   #8 (permalink)
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Before I came on here and learned of why not to use a K&N filter, I had the K&N FIPK system. The air box that comes with it and the tube that it provides to replace the rubbery flex tube stock garbage are second to none, if you can find one used on ebay, do it then do what I did and get the Napa 6637 Filter like the DIY or the Tymar, that way you get the best of both worlds. My system will outflow the tymar and still won't sandblast the turbo like a K&N
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Old 01-16-2008, 07:34 PM   #9 (permalink)
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Quote:
Originally Posted by 37Driver View Post
Ford AIS

I 2nd that.....
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Old 01-16-2008, 07:46 PM   #10 (permalink)
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Another vote for AIS
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Old 01-16-2008, 07:59 PM   #11 (permalink)
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Originally Posted by demoes4x View Post
Another vote for AIS
And another one...
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Old 01-16-2008, 11:30 PM   #12 (permalink)
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The Donaldson 6637 or Napa wasn't easily available, had to settle for the Fram CA6818 and it said "Duralite" on it. This old post TheDieselStop.Com Forums: Are all Tymar style replacement filters created equal? YES!!! seems to point out that whether this particular filter model is Wix, Baldwin, Fram, Donaldson... they're all the same one.

Anyway, I installed the Fram today (I'm no fram fan, haven't used their junk oil filters for years) and can't say I see any more boost or more noise as some people say but I just burned up the hill from my house. Haven't taken it on the hwy yet. Just a quick shakedown run.

Unfortunately Lordco Auto Parts - Home Page autoparts ripped me to the tune of $57cdn for it. Rip off artists. $1.69 for the 4" diameter white plastic pipe piece, $3 for clamp. Just cut the pipe piece to side and chamfered the edges a bit. Was a b*stard to get the pipe into the hard plastic/rubber of the filter. Had to hammer it in with a board on top. Real tight.

Prob my imagination... seemed to spool a tiny bit faster.

Anyone know what the wastegate actuator is set to open at (psi)? From what I've been reading it's adjustable. Which way is more, which way less?

Edit: After a good drive to work and back... the sound under boost isn't any louder than stock. But if you're on it for a while WOT and then snap the throttle pedal closed the turbo stall sound is incredible... it's probably 3 times as loud as OE air box. Sounds like a blow off valve. :-)
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Last edited by westvandude; 01-17-2008 at 09:34 PM.
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