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The Turbo Air Guide (TAG) is device invented by Diesel Power Products, which when used in the intake of a turbo charger can help to get more air smoothly in to the compressor. The TAG straightens air flow into a laminar flow and directs it straight into the compressor of the turbo, resulting in more power, cleaner burning and better mileage. Click on the PDF file below for more information.  Scroll down to the bottom of the page for an article written by John Holmes for the Turbo Diesel Register (TDR).
TA [1.12Mb]
94-02 5.9L Dodge Cummins TAG-I $99
Click Here for Product Details!The Turbo Air Guide (TAG) works by redirecting air entering the compressor side of the turbo charger into a laminar flow. This redirected air reduces drag on the compressor wheel due to turbulence and redirects the air straight into the compressor. This is the TAG you want if you are running twin turbos in your 2nd Gen. Dodge. For more info and testing on the TAG please refer to the links on the Home Page.
94-02 5.9L Dodge Cummins TAG-II $149
Click Here for Product Details!The Turbo Air Guide (TAG) works by redirecting air entering the compressor side of the turbo charger into a laminar flow. This redirected air reduces drag on the compressor wheel due to turbulence and redirects the air straight into the compressor. Guys that have used both the Dodge TAG I and the TAG II say that the TAG II gives better low end response than the TAG-I. The TAG II is being phased out due to high production costs. It is a great product and an impressive looking part. Get them while they last. More info on the TAG is available through a link from the home page.
94-06 5.9L Dodge Cummins TAG-III $129
Click Here for Product Details!The TAG-III is a more suitable option for 2nd Gen. trucks running aftermarket 4" i.d. smooth bore intake hose like our Cool Hose. The Turbo Air Guide (TAG) works by redirecting air entering the compressor side of the turbo charger into a laminar flow. This redirected air reduces drag on the compressor wheel due to turbulence and redirects the air straight into the compressor. More info and testing data can be found on our home page.
94-03 7.3L Ford Powerstroke TAG-1 $99
Click Here for Product Details!99-03 Ford 7.3L Powerstroke TAG-1 This Turbo Air Guide installs in the small end of the existing factory turbo inlet hose. The Turbo Air Guide (TAG) works by redirecting air entering the compessor side of the turbo charger into a laminar flow. This redirected air reduces drag on the compressor wheel due to turbulence and redirects air straight into the compressor. The OT305 is the smaller TAG in the picture. Upgrade to the combination of the OT304 and the OT305 for even better results. Please see links on Home Page for more info on the TAG.
94-03 Ford Powerstroke 7.3L TAG-II $189
Click Here for Product Details!Get more of what the TAG gives you in turbo performance with the TAG-II. In this application the existing factory inlet hose (shown in the photo) to the turbo is used in conjunction with two Turbo Air Guides, one small one which installs into the inlet of the turbo and a larger one which installs in the large end of the intake hose shown in the photo above. The larger TAG serves to direct and smooth the air flow to the smaller TAG while the taper of the hose accelerates the incoming air to the smaller TAG. TAG-II kits include a large and small TAG with installation instructions. Please refer to the Home Page for more information and testing on the TAG.
94-03 7.3L Ford Powerstroke TAG Upgrade $99
Click Here for Product Details!For those who already have a TAG-I and want to add the second TAG to make a TAG-II, this is the larger TAG sold separately. Please see links from Home Page for more info on TAG.
03-05 6.0L Ford Powerstroke TAG $99
Click Here for Product Details!The Turbo Air Guide (TAG) works by redirecting air entering the compressor side of the turbo charger into a laminar flow. This redirected air reduces drag on the compressor wheel due to turbulence and redirects the air straight into the compressor. Please refer to the Home Page for more info and testing on the TAG.
5.5" Turbo Air Guide $289
Click Here for Product Details!NEW TAG for turbos with 5.5" hose inlet such as Holset HT-60. This TAG is very similar to the configuration of the TAG-III used for the smaller Holset turbos on the Cummins powered Dodge pickups. The 0T315 TAG is now available and in production. As test results become available we will post them
6" Turbo Air Guide $309
Click Here for Product Details!Turbo Air Guide to fit large turbos using a 6" connection hose. This new TAG features the same velocity stack funnel used on the small TAG-III, but the funnel is long and made to fit the 6" inlet connection of large turbos such as the CAT.

Here's a copy of an article published in the Turbo Diesel Register (TDR)

 

Turbo Diesel Register article by John Holmes, issue #44.

 

In the last issue, on page 158 in the TDRelease section, Robert introduced you to the Turbo Air Guide (TAG).  Dave Meheen, of Diesel Power Products in Pasco, WA, sent one down to Carson Dodge for me to test.  I selected our ‘02 because it is fully instrumented for testing such products.  The installation was about the easiest of any aftermarket product I’ve ever tested.  Just snap it in the rubber boot that feeds the turbo inlet.

 

It was interesting to see what happened from this simple honeycomb looking piece of metal.  Whether it be Airtabs or Turbo Air Guides, the study of air flow is fascinating. This gadget is basically an air straightener.  The air coming through the flexible boot is curving and bouncing around over the “ribs” in the tubing. The TAG gets the air flow straightened out and feeds it into the compressor of the turbo so that it doesn’t “fight” the turbo in doing its job.  This cuts drag and noise while decreasing turbo spool up time, plus it increases engine performance/efficiency.

 

I didn’t get quite the dramatic results that are cited in Meheen’s technical literature, however, that may be due to our altitude...we’re sucking in less dense air.  We have a 6% grade close to our ranch that I used for the “pulling” part of the test.  It was a calm, 42 degree day.  I made three runs each way across a five mile flat and then up a two mile grade, first stock to establish my base line, and then with the TAG.

 

As predicted, I found only a slight improvement in the flats at 70 MPH.  I averaged about one pound reduction in boost, around 25 degrees in EGT and surprisingly ½ pound increase in fuel pressure.  With such light loading I was showing only 500 degrees and eight pounds boost at 1825 RPM without the TAG.

 

When working the engine harder, I got more dramatic results.  On the grade, at 65 MPH, I saw a drop of 75 degrees in EGT, three pounds of boost and a full pound increase in fuel pressure.  I might point out that on the grade I still wasn’t working this truck very hard.  Without the TAG, I was showing 20 lbs and 700 degrees.  With a loaded trailer I would have been at 30 lbs and 1000 degrees.  Note that the increase in fuel pressure with the TAG shows the engine wasn’t working as hard as without it.

 

I noticed quicker turbo spool up, not just by the seat of the pants, but also in how quickly the boost gauge jumped up.  The thing that really got my attention was the noise reduction.  Our ‘02 has always had the noisiest turbo of any of our five Rams.  Not only did the TAG greatly reduce the whine of the turbo at high levels of boost, but it almost completely eliminated turbo “stall” or “surge”....that loud sneeze/snort sound you get when you come off the throttle quickly after having your foot in it.  For that alone I’d buy the thing! 

 

By the way, if you order one be sure to mention that you’re TDR.  That drops the price from $149 to $129.  Check it out on www.dieselpowerproducts.com.

 

Turbo Air Guide | Diesel Turbo Charger | Diesel Turbo Intake | Diesel Performance Parts

 
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