Power Driven Diesel Tests The “TAG” Theory: Turbo Air Guide Testing

If you’re frequently on YouTube, and you’re on here, chances are you’ve stumbled on Power Driven Diesel‘s YouTube page. They have been doing all kinds of testing of products and covering different industry theories and today, we found out they are testing out the “TAG” modification that was once a thing back in the day. What once was a for sure power adder, is now put to the test to see if it was fact or fiction.

Todd Welch, the owner of Power Driven Diesel, starts off by explaining what a “TAG” is, or also-known-as a Turbo Air Guide. “What a Turbo Air Guide is supposed to do, or supposedly does, is it directs turbulent incoming air into the metal honeycomb screen allowing the turbocharger to ingest smooth air which results in more horsepower,” Welch explained.

Now, if you’re looking at it, it looks like an air intake hose. Well, you’re right it is, but someone has added the screen to hopefully improve the performance of your truck. “I found this thing in my garage from a long time ago, and back then we didn’t have a dyno,” said Welch. “Now that we have a dyno, we’re going to test this once and for all.”

The truck they’re using for this test is no newbie to the rollers. It has been on the dyno many of time and has been averaging 370-horsepower. So, before any of the testing began, Todd and his crew took their bets on whether or not the TAG would improve the performance, or maybe even take horsepower away. “I’m a positive guy and I’m saying that with the TAG, the truck will pick up 5-horsepower setting us at 375-horsepower,” exclaimed Welch.

So, after the TAG was installed, the truck ended its series of dyno runs at 359-horsepower. But, others at Power Driven said they thought it would lose power from having the TAG installed. So, it was removed and a few more runs were made. After probably a bit of heat soaking, the truck didn’t make near as much. We can’t guarantee that it lost power because of the TAG and can’t guarantee that it helps with power.

“So, the reality is the TAG probably does zilch for increasing horsepower,” Welch said. “So, you’re better off saving the $100 for this unless you’re wanting to quiet down your turbo because it does do that.”Although this doesn’t end with incredible results, at least now you know what they have to offer if you see one out in the marketplace. Stay tuned to the Power Driven Diesel YouTube page for more cool videos. Stay tuned for more of the industry news right here on DieselArmy.com!

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About the author

Artie Maupin

Artie Maupin is from Southeast Missouri and has an extreme passion for anything diesel. He loves drag racing of all kinds, as well as sled pulling competitions.
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