Lets see how many threads I've made similar statements in:
Write Up: Power Potential of the 6.0L PSD
New Air Filter
Build Thread: TowBoss F350 6.0L PSD.
And that's just recently. Now here's the counter point (other than the beaten horse of the stock unit supporting
500RWHP): The stock unit holds 1303 grams of dirt, dust and debris you don't want running through your investment. Where as even the best aftermarket filter will only hold 170 grams. [Source: S&B's independent test, failure point reached at 28" vacuum] That puts a replacement of an aftermarket unit at 13% of the life cycle of the stock Donaldson.
I agree it will hold most builds back by 15-25RWHP depending on level of performance, turbo selection, and electronic tuning. But that number is in the over-3,000RPM band, not down low where I doubt most drivers will notice the change in power itself, but instead focus on the intakes audible differences and turbo performance.
There are those of us, who cannot, or choose not, to discard the filtration provided by the stock airbox, Adrian. Now with the statements made in the first post, are you trying to say there will be issues if the MTW is ran on a stock intake?
We know the "Durastroke" has been abused and used heavy under towing with Wikewa, with no adverse effects. Do you feel it is different with the Hybrid, and larger stage turbos?
This isn't a bash on you Adrian, I actually enjoy this debate on the ORG. Typically gets some good information passed.
I did just notice another post of yours Adrian, concerning a Stage 2 owner running a stock filter, then shifting to aftermarket. Have any other details?
I'm looking at the Stage 2 or Hybrid, as most folks here know, utilizing the stock box and rarely operating over 3,000RPMs.
Another theory of mine, perhaps we can start getting some MAF numbers on these turbos with stock and aftermarket intakes, get some solid numbers and put an airflow ceiling to the stock box for the purpose of discussion?