http://www.blackclouddiesel.com/Dodge/tag.htm
Anybody have any experiance with one of these? It claims to reduce the turbo noise, bad thing, but claims to increase boost, HP, and MPG,and dramatically increase spool up time,. I learned long ago not to believe everything you read and only 1/2 of what you see.

 

I have one on mine. It does quite the turbo noise down when crusing, but it still whistles nicely. I have the bottom of my stock box completely open. My boost seems to be a little bit lower for all situations 1-4#, but my EGTS are cooler 50-100* depending on situation. I've seen about a little faster spool up. I don't haul heavy, but I do alot of 2-5,000# loads. I've seen about 0.5-1mpg increase.

 

why would you want to reduce boost pressure?

 

It just reduces boost while driving correct? It doesn't actually cause enough restriction to reduce your max boost levels does it? I could see where reducing the boost while driving would be helpful because of an increase in MPG's, but I wouldn't want to reduce the max levels.

On a side note...... I just saw in the description that they say it will not work with the aFe Stage 2 intake systems. That cancels me out......

 

It has lower boost needed for crusing. The max boost is the same. As flow dymanic go you're getting more air per rev out of the turbo with the TAG than with out. So less boost pressure is required for the for a given input.

 

That's what I was thinking but I wasn't 100% positive. The concept does make sense.....

 

I've have a TAG III and to be honest other than slightly lower boost level while cruising I can't say I have seen any significant improvements. I originally had the TAG and Dave gave me a good deal to "beta" test the TAG III.

I also had a TAG exhaust primarily to cut the drone of the MBRP aftermarket exhaust and it did cut the drone a bit. I ended up replacing the MBRP muffler from the kit with a Rokktech Silent Might and that sure cut the drone without the exhaust TAG.

I understand the idea of laminar flow but not too far after you straighten the flow out it enters the violent world of the turbo compressor wheel becoming turbulent flow again. I probably would not purchase another one. Just my $.02 worth.

L8r,...........Dave

 

I got one to try out when I was living at high altitudes and here is what my experience was. I was living in WY and CO and figured I would try it to help out turbo lag, when I moved up there my SPS 66 had a more turbo lag than when I lived in TX. When I got it the first thing I did was flow it on a SUPERFLO flow bench with my intake and then flowed without the TAG and I did see a better flow with it than without. When I moved back to TX however I thought it was hindering me and it turns out that I could spool faster without it than I did with it in. It did quiet down the whistle from my turbo a bit. So the way I see it is its six one way and half a dozen the other.