2020 Silverado HD

ShinerBock wrote:

Cummins12V98 wrote:
I am talking stock truck.

My argument still stands even in stock form. Yeah, the stock air box with the flap blocking the front intake can take in X amount of air, but how much harder does the turbo have to work to move that amount of air pulling from the fender versus from the front which it rarely does versus the GM truck. That is a major reason why the new L5P Dmax is able to outperform the Ram in most fuel economy tests since its release.

It is not about how much can be pulled, but rather how easy it can do it. With the Ram's active air having the front intake being closed 95% of the time, it has some room for improvement. There is a reason why some intakes improves efficiency in some diesels, because they don't make the turbo work as hard to move the same amount of air.

I get that you don't like owning something that is not the best, but there is much to improve with the Ram active air box especially in regards to when it pulls air from the from. It is not anywhere near to 100% of the time like GM's system.

BTW Cummins12V98, if by any chance you or anyone else wants to perform this mod of taking the front flap off, but want to add a one way drain valve similar to what the GM intake has, here are the part numbers from Donaldson.

Vacuator Valves

You can probably get these at any place that sells Donaldson filters or Medium/Heavy duty truck dealerships for a lot less than the GM one. I used the P149099 which is less than $5 for regular walk in customers at my company's dealers.