home made air filter
Senior User
Joined: Sep 2003
Posts: 275
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From: Anderson, SC
Fisher-
The air is not coming back out, just slowing down. The design of the turbo wouldn't allow it to come out if it wanted to. If air was forced back thru the compressor wheel, it would actually reverse. Think of it this way, air is moving at a constant high speed from point A to point B. In the middle is a compressor wheel which is turning at a constant high speed. The compressor blades are fixed, so any change in air speed will change the compressor speed. If this speed is decreased slowly, the air moving thru the blades will remain laminar, the compressor will slow gradually, and the blades will keep their "bite" if you will. If the air speed is dropped suddenly, the blades will create turbulence as they try to adjust and regain their "bite". This is the noise that is heard thru the Tymar. This does happen with the factory airbox, and I am convinced that the Tymar does not make this better or worse, just audible. The Tymar does, without a doubt, flow much more air, but the speed at which the air flows is the same as the stock box.
The air is not coming back out, just slowing down. The design of the turbo wouldn't allow it to come out if it wanted to. If air was forced back thru the compressor wheel, it would actually reverse. Think of it this way, air is moving at a constant high speed from point A to point B. In the middle is a compressor wheel which is turning at a constant high speed. The compressor blades are fixed, so any change in air speed will change the compressor speed. If this speed is decreased slowly, the air moving thru the blades will remain laminar, the compressor will slow gradually, and the blades will keep their "bite" if you will. If the air speed is dropped suddenly, the blades will create turbulence as they try to adjust and regain their "bite". This is the noise that is heard thru the Tymar. This does happen with the factory airbox, and I am convinced that the Tymar does not make this better or worse, just audible. The Tymar does, without a doubt, flow much more air, but the speed at which the air flows is the same as the stock box.
Post Fiend
Joined: Aug 2002
Posts: 5,324
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From: Denton,TX
Originally posted by fisher_of_man
john....I'm intrested in knowing how long ( years and miles) you have had your Tymar on.
john....I'm intrested in knowing how long ( years and miles) you have had your Tymar on.
Posting Guru
Joined: Jun 2003
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From: West Texas
John...
yeah...that's where I've been doing all the reading lately on the turbo stall/surge subject and I guess that's what got me second guessing this whole deal.
Phat...sounds reasonable....and I'm with you as far as it has always been there, but the tymar makes it more audible. so what your telling me is that this shifting into OD and the decreased air flow isn't stall or surge? and if it is one of these, which one?
yeah...that's where I've been doing all the reading lately on the turbo stall/surge subject and I guess that's what got me second guessing this whole deal.
Phat...sounds reasonable....and I'm with you as far as it has always been there, but the tymar makes it more audible. so what your telling me is that this shifting into OD and the decreased air flow isn't stall or surge? and if it is one of these, which one?
Senior User
Joined: Aug 2003
Posts: 273
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From: Texas
After using the Ford AIS intake system for about 90 days I have found that it filters great. The downnside is, that it starves the turbo and engine for air. The filter indicater was at 50% and the filter is perfectly clean. I reset it and went for a run with the 110 HP setting on the SCMT and after 5 miles of agressive driving the indicator was about 25% and on the return trip back up to 50%. I would think this would mean the turbo is starving for air??
Tuned
Joined: Aug 2003
Posts: 284
Likes: 5
From: Mena, AR
Mine does the same thing with the Diablo 60 HP tune. Smokes a lot as well. I was thinking the same thing - not enough air for that increase in fuel. Also found the EGT's to be 1200+ at WOT. Ouch! I backed off to the 40 HP tune until I can get 4" exhaust put on.
Posting Guru
Joined: Jun 2003
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From: West Texas
hmmm.....that suprises me. I have read several things (especially on ford-trucks.com) that suggest that the new AIS flows just as good if not better than the Tymar and filters just as comparablely. I don't know what I'm gonna do....for now, the Tymar stays on and the noise has either lessened or I'm getting used to it. Either way, at the moment I'm happy with what I"ve got.
Post Fiend
Joined: Aug 2002
Posts: 5,324
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From: Denton,TX
Originally posted by fisher_of_man
hmmm.....that suprises me. I have read several things (especially on ford-trucks.com) that suggest that the new AIS flows just as good if not better than the Tymar and filters just as comparablely.
hmmm.....that suprises me. I have read several things (especially on ford-trucks.com) that suggest that the new AIS flows just as good if not better than the Tymar and filters just as comparablely.
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Joined: May 2001
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From: Cabot, Arkansas
I have read several things (especially on ford-trucks.com) that suggest that the new AIS flows just as good if not better than the Tymar and filters just as comparablely.
Senior User
Joined: Oct 2003
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From: memphis
FOrdFOever believe it or not I did catch the year model of your truck. I have a 96' that I pull a 36' Sundowner with out to Wyoming from Tennessee. Have to keep passenger mirror on exaust to make sure I don't load up the motor and look like I brought an old steamer from the Mississippi to the Big Horns. No Air! I'd like to know if any extreme mods had to be made putting on my filter? I have a question to Phat02. What about water? I still run the stock box. I've been in some real frog stranglers down south. Is the Tymar set up for my truck? I haven't check out webshots.com but heading that way now. I like the sound especially going up the hills in second! Ok, I'm only going 35mph but it sounds great!
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From: West Texas
Originally posted by horsecop
Where's a good place to get the 4" stainless pipe from? Can it be aluminum?
Where's a good place to get the 4" stainless pipe from? Can it be aluminum?
so Michael....you made the switch from the AIS to the Tymar?
