Fleet air filters...anyone use them?

The air cleaner hanging off the side of the hood has to slow the air down and direct it down the pipe, that is restrictive. The air box used in a freightliner uses the same technology as Nascar uses there is a high pressure zone in front of the windshield. it actually gives the air a helping hand into the housing.
What I always ask is warranty, if it fails will they cover down stream damage, It was stated it has a 3 year Guarantee

 

volvos suck air from the side's of the hood (low pressure zone) not from the back of the hood (high pressure zone) like aero freightliner's. but that aside if the FILTER is less restrictive the turbo doesn't have to work as hard to make boost psi. so a less restrictive air intake system will yeld more hp and better mpg.

 

I have the older Volvo 770 (98) and have often wonder if some type of scoop mounted on the hood air inlet would help like the Fleet Air Filter did by putting more air pressure into the filter box?

I think the Freighliner has somekind of chrome looking scoop box on their hood that I thought about getting one to retrofit to the the Volvo.

I even thought about plumbing in a 2nd air filter box under the hood with a new inlet since changing to the Fleet Air Filter showed me how restricted the stock OEM paper filter was in that tight air box.

 

I have wondered the same thing .adding a ram air affect what'd you see the results .

have you seen any improvements since adding the fleet air ?

 

3/10ths to 4/10ths mpg on my 1998 Volvo 770 with Cat 3406E that has PP Box, Exhuast manifold, turbo, FASS, Walker Megaflow mufflers and Microblue wheel bearings and rear ends....worth it to me because the Fleet Air Filter paid for itself in 3 weeks.

Filled up yesterday and got 8.93 mpg my last dedicated run.

 

how heavy do you run usually ? I'm never under 80,000 pounds . if I cannot find k&n then I will get the fleet air

I tried the manifold on my 610 which has a volvo 465 .no improvement it was from another company not PP

 

also which you like better walker or Donaldson?

 

Ram air = drag
Unless you get it under your bumper or in front of your windshield where it already is you will likely see negative results.

 

There are a lot of things that you can do to make the motor more powerful, there are a few things you can do on an old unit to make it more efficient. An air filter is not one of them. like I said I have ran a lot of units on the dyno and if having no air filter does not affect hp it can not affect mileage. The one that I found interesting was that when the exhaust was removed the HP came down.

 

True ,some engines need some back pressure to operate at their optimum.
Not nearly as much as they get from most exhaust systems so a high flow usually does improve performance.