Secondary air filter?

Why don’t you get us some dyno results and solve it? You can’t obstruct an airway with a filter and not have a reduction in horsepower. It’s the very basics of engine performance.

 

Did you notice any improvement in fuel economy?

 

Sorry to resurrect a dead thread here, but was a consensus ever reached? I'm all about incremental horsepower gains, no matter how small

 

Noted.

(no gains)

 

No gain.

FWIW. Air flow restriction is based on the air speed and the cross-section area of the flow path. These trucks have very large intake cross-section permitting a very large flow area. This means the air speed ahead of the throttle body is very low. The restriction is very low.

Once upon a millennia ago, the engine in my ride was a 455 cubic inch V-8. This engine gulped air and fuel. The air filter housing had a snorkel on the can with perhaps a 6 square inch opening. Much higher restriction.

Today's intake systems are very sophisticated, designed for maximum performance and economy.

Sure, you could completely alter the intake system on the Taco. Although, I doubt if you will see much in actual real gains. I'm sure the butt dyno and the ear will say, "Yep, gots loads more power. Good I yanked out the restrictive charcoal filter."

Do as you wish. I'm sure your seat dyno will provide the data you desire.