06-24-2012, 05:00 PM
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The Silent Service
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Join Date: Dec 2010
Posts: 4,993
Feedback Score: 0 reviews
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An excerpt from my performance thread:
Write Up: Power Potential of the 6.0L PSD
Quote:
Cold Air Intakes
There is a lot of debate about the cost-benefit ratio of upgrading the stock air filter and intake assemblies on the 6.0L. The old mindset was that the stock air filter was good to 500RWHP, and for the most part that is still correct. However once you building beyond the limits of electronic programming, you are limiting your gains by the stock box.
507RWHP was put down with 175's and the Powermax turbocharger, it was truck builds similar to this that gave folks the impression that the stock air filter can and will support builds upto that level of power. Depending on your driving evironment, and personal perferances, the stock filter may not be best for your 500RWHP build. Dusty areas, and dirt roads, situations were filtration is more important is were the stock filter surpasses anything on the aftermarket for filtration and protecting your investment.
When you look at the gains of these advanced builds being put together now. 485RWHP on an S&B intake, exhaust, stock injectors, and a Stage 2 turbo, with ECM/FICM tuning. (Only 22HP shy of that 175, Powermax, stock air box, ECM tuning only.) With the investment of a turbo or injectors (between $850-$3600, plus instalation), its pretty clear you are holding your build back with the stock air filter (roughly a $400 upgrade). There are two leading filter systems out there, the first is the S&B intake and the other is from AFE.
When you look at weather your build requires the addition of a cold air intake, look at that filtration to performance balance.
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Hope this points you in the right direction. There was just another truck put down over 500HP on the stock air filter setup, with both injectors and turbo. The flow is there for those builds. If you are starting to modify your 6.0L, the money is better spent elsewhere for the time being.
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The stock air filter is not a real hindrance till 500hp but a CAI will flow better albeit at the cost of some filtration.
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