NAPA 6637 - And other air filtering options

[Jack_Toepfer]

NAPA Filter #6637 was the best thing I did, aside from the V3, DP, and muffler delete. And was very easy.

I didn't have to change out my stock air tubes going to the turbo. I simply removed the factory air box, sanded down the outside of the opening on the new filter and then put some buck screws through the hose clamp so it would stay on. Just sanding the filter let it slide off of the factory tube after I closed the hood. There isn't a lot of room under there after you put a filter this big on the truck. I banged mine out on the last oil change... but it is still pretty clean. Its been on the truck for almost 10k.

I haven't dont the ZooDad mod yet. Thats basically cutting out some of the plastic behind the grill to allow more air to get to the filter. With this much surface area... I think you get as much air as you need anyway.

The factory box is fine for what it is. The 6637 will out flow it, and will allow you to hear some more turbo whistle. I think the added surface area also makes it last a little longer. It is probably overkill for most applications... but whats wrong with that?

When I ordered my tuner from Jody at DP Tuners he strongly recommended an aftermarket intake. I think this one is just as good as the $300+ intakes.

[Hawaiian Diesel]

That's the same filter I use. I used a Poly pipe connector I found at Home Depot to connect the stock tube to the filter.

I believe it was originally called a Tymar filter.

What's a zoodad?

[frashdog]

This is the "tymar filter"

I just ordered 4 for $130 shipped from fleetfilter. It cost me near $50 last time I got one at napa. Still worth it when compared to whet else is out there. I change it once a year. I have the stock filter minder fitted into the intake tube, never moves.

I do remember seeing a bench flow test with all the top filters out there including the tymar. The tymar was right up there. They all have more than enogh flow capabilities.

Aside from the tymar the fords severe duty AIS is sweet just no whistle like the open element filter. Around $250. You can pay over $500 for some other performance air filter set ups. Probably not worth getting anything either than a tymar for the whistle and big truck look or the ford severe duty AIS for superior filtration especially in really dirty areas.


The zoodad mod is cutting out some plastic in the grill area between the driverside head light and radiator. Oh yea, this mod's like 4hp on the sotp dyno. If you follow the stock air filter box intake route through the grill. You should see the obvious obstruction. Cut it out. I used a rotozip bit on a dremle tool. Maybe some one has pics.

Don't forget the foil delete mod. Take all the foil off the intercooler tubes. Get like 3hp right there. Or the hood insulation delete mod. And for those who are true turbo whistle freaks go righ to the exhaust delete mod. Turn the down pipe 180degrees up out the hood and cut it just enough so the smoke clears the roof.then they tell people it's a "puller"

[Jack_Toepfer]

Don't forget the foil delete mod. Take all the foil off the intercooler tubes. Get like 3hp right there. Or the hood insulation delete mod. And for those who are true turbo whistle freaks go righ to the exhaust delete mod. Turn the down pipe 180degrees up out the hood and cut it just enough so the smoke clears the roof.then they tell people it's a "puller"

Haven't gotten to these yet.

I'm not cranking the exhaust up through the hood... I think I'm going to drop it out behind the front tire. Then I can put a new veggie tank right next to the stock one. I won't have sloshing issues and my back passenger tire won't be black from my current exhaust modifications

[skyskijason]

JUST changed my 6637 the other day - 50k miles. I THOUGHT my peak boost was off a little. If it is, its 'cause my up-pipes are leakin' (yours prolly are too!).

I used a 3" PVC coupling and a clamp (besides $38 NAPA 6637).


The Excursion has Ford AIS (by Donaldson) I got for $200ish at www.powerstrokeshop.com This is best filtration and best flow possible for PSD. HUGE honkin' element lasts a long time too!

Zoodad - lift up rubber thingy between radiator and grill. Look down where air intake stops just behind header panel. Many drill (2) 2"ish dia holes in the fiberglass header and get abit of a 'rammed air' effect. I finally added a screen to mine to cut down on the big bugs that were makin' in there!

I'll be happy to snap a pic if ya don't see what I mean.

[Hawaiian Diesel]

Thanks guys,

I'm on the Zoodad as we speak!

[triplemoutdoors]

[QUOTE=frashdog;3156]
Don't forget the foil delete mod. Take all the foil off the intercooler tubes. Get like 3hp right there.QUOTE]

frashdog,

I did the foil delete just because I think it looks better. I did not know you get a little more hp with it. How?

[skyskijason]

[QUOTE=triplemoutdoors;3181]

Don't forget the foil delete mod. Take all the foil off the intercooler tubes. Get like 3hp right there.QUOTE]

frashdog,

I did the foil delete just because I think it looks better. I did not know you get a little more hp with it. How?

It works just like CHROME. More shine = more HP. More 'whine' = more HP too!!

See, its exactly the same, only different!

[triplemoutdoors]

[QUOTE=skyskijason;3183]

It works just like CHROME. More shine = more HP. More 'whine' = more HP too!!

See, its exactly the same, only different!

Right! Pass me another beer.:cheers:

[Jack_Toepfer]

I did the foil delete just because I think it looks better. I did not know you get a little more hp with it. How?

My thought is that the factory put that foil on there for noise reduction. By removing the insulation you're allowing ambient air to help cool the charge. Though it is not necessarily substantial, every little bit helps.

[Tampa450]

Not knocking your set-up... but I personally like the AIS system for my situation.

- filters BETTER than stock
- draws Cool outside air
- Has extremely good fit/finish/seal

Thats what I have on both my 7.3's.
That - and I guess what you could call a 1/4 zoo-dad mod.

[skyskijason]

Not knocking your set-up... but I personally like the AIS system for my situation.

- filters BETTER than stock
- draws Cool outside air
- Has extremely good fit/finish/seal

Thats what I have on both my 7.3's.
That - and I guess what you could call a 1/4 zoo-dad mod.

RIGHT YOU ARE! I did the 6637 mod when I had little to spend and it performs excellently (and lasts a looong time). And I kinda like the noise.

I put the AIS on wifes Excursion for the reasons you mentioned.