OK, I have tested the TAG.

Heres a few numbers in regards to EGT with a specific combination of BOMBs on my 04 6 spd HO 4x4 3500 Dually...

BOMBs are as follows:

Ram Air 3
6 level EZ on level 6
Adjustable Wastegate elbow, nearly shut.

WOT throttle on a 6% grade I could hit 1350F up to 150 Kilometers per hour or about 90 MPH. It was a slow climb in temps. ACCEPTABLE EGT's.

At cruise at 70 MPH or around 110 KMH I was seeing 650-700F on the flats.

With the TAG and the above BOMBs...

WOT on the same hill similar ambient temp I could not hit 1275F I was pretty much sitting at 1250 and the speed and RPM climbed.

At cruise...600 to a shade past 600F.

Throttle reponse was better!

Just like several folks were or still are skeptics on the EGT reduction of the Scotty Systems, I was a skeptic about this product. So I called Dave and offered to test one. He had one to me the next day.

Boost was very similar but the TAG did show one or two PSI higher at WOT.

In spite of my doubts I found that it must assist the air...into the turbo...I speculate that its shaping the air after the twists and turns of the factory turbo inlet hose.


These tests were done with an empty truck.

I'll test more with different BOMBs and loads.

I'll admit it left me a bit surprised...it works!

 

It sounds like a conspiracy to me.

 

TAG? Thermonuclear Atomizer Gizmo?

 

Men, the Tag principle works. Search the net or do a home test with a pipe, fan, and screen of different mesh sizes. Send smoke through the pipe with the fan. Put different screens on the end of the pipe one at a time. Measure the distance that the air travels before swirling. Different screens give differnt lengths. FACT!

Disclamer: I am not jumping on the wagon. I have researched and discussed this before and Scotty and I discussed it briefly. This is sound engineering principle.

Draw your own conclusions. - JKE

 

Looking at the one I had (sold it), the holes were less than 1/4" in diameter. It just seems like it would be restrictive, to the point of taking away from some of the benefit. Wonder if they made one with hole sizes in the 1/2" range what the results would be. It would definitely let more air through and lend to feeling better about purchasing one. Look'n at it, it blocks a lot of the air way.

 

I wish somebody could do the same test on a torque tube (or a homemade intake) as well. The smoothness of these seems to counteract the theroy of the TAG...

 

Yeah dat be me...all about conspiracies.

Like I said...Skeptic was me.

To each his own.

I understand the concept of air flow, turbulence, laminar flow, resistance, restriction, etc etc.

Certain types of disruptions to flow can benefit, some do not.

So how come the winds that are say 40 MPH are actually faster after they hit a building and deflect?



Straightening air or controlling its path is very old technology.

It does have to be matched just right and of course the variable like demand from the engine, density, swirl pattern etc etc are all parts of the problem/solution.

Speaking of swirl pattern...how come Cummins heads are lowered in effiiciency when most machinists tinker with that swirl chamber?

There are beneifits to port and polish the head but not that swirl area.

What about those things people are sticking on their trailers and trucks? Those plastic items that change air flow and slip stream characteristics? Bogus or legit?

A lot of parameters have to be considered and all I did was put the thing on the truck and voila...results I thought might be snake oil are actual and tangible.

I guess I had to step outside the ' box ' and I learned again...some things do work in spite of theories.

 

So you think I ought to figure out a way to incorporate the TAG into my new intake tube?

I guess I will have to force it into the lower 90 rubber boot...

 

I have to agree with Scotty. I was skeptical about this thing but couldn't resist the urge to try one. Turbo spools much faster, especially on any type of hill or when loaded. Gained about 2 psi boost at full throttle and boost runs a few pounds lower at cruising speed. Egt's about the same while cruising but much lower at full throttle or climbing hills. I just finished my first tank of gas with this thing and gained 1.3 mpg. My truck is noticiablly more responsive and just runs smoother and quieter. I don't have any idea why it works but I'm convinced it does in real world driving. I'm happy with the investment.

 

I would be interested in hearing from Car_nut57 on the different sizes of vanes they tried during R&D and their results. Surely they didn't just make the thing as is and said "here ya go." Maybe there is a reason for the vanes being so small. The theory passes the common sense test. If they made one with about 1/2" vanes, I would buy one and "make" it fit my intake tube just to test it.

 

Do they make one for us 2nd gen guys?

 

What BigBlue asked, and where does one acquire a TAG?

 

I am not sure if it would work with a different intake tube...I am sure testing would reveal if its something to add or not.
It may need to be slightly different.

I know that my buddy who is an engineer was all over this thing measuring it, measuring the turbo inlet, the length of the turbo inlet hose on the truck and mumbling all sorts of calculations.

His conclusion was that it would probably reduce the effort of the turbo to get air and improve the flow and the result should be lower temps.

He's never tinkered on these engines, I never told him the results of others. He does not have a computer.

There is a TAG for 2nd gens. Folks using the Scotty II and adding it are seeing reduced cab noise and I think Forrest on here has some good results.

I'll let the designer comment on this further.

It does definately improve throttle response or spool up.

I have to agree that when I first looked at it I figured it was going to be a huge restriction. Well, I was proven wrong.
Dave asked that I tell it like it is and never once made a claim.
I feel that he just wanted me to find out for myself. I assured him I would tell what my findings were...good bad or indifferent.


The TAG should be found here...

http://www.dieselpowerproducts.com/dodge

 

Thanks scotty. I love the Scotty 2 and the noise. Faster spool up would be nice (especially when I put an EZ and 275's on here ).

 

I just happen to have one for sale on the classifieds if anyone's interested? Its never been used.