Aftermarket Air Filter At Altitude

Im up here at 6500 feet and routinely go higher, now I know the consensus, and really the objective data found when I searched is that the 2TR does not benefit from an aftermarket air filter by any noticeable amount, notably because the stock air box is not the restriction point in the engine.

What I'm wondering is at 6-10 thousand feet WOULD the aftermarket air filter (afe pro dry etc) make a difference. Would the fact that the air is so thin change the equation - where the motor could really use that small amount of extra air?

Thanks.

 

None at all. Air is less dense up there. Only thing you can do to make the truck feel more responsive is a Sprint Booster or a supercharger from URD. I've got a sprint booster on my 2005 and love it. Made the truck drivable.

 

That sprint booster looks cool but at 300 seems too much.

 

Look at it this way, with the thinner air your stock air filter is already 20-30% less restrictive than at sea level. You won't get more air in, there is just less air to get.

Taking it to the extreme, with an engine in outer space you could reduce the intake to the size of a straw and still do as well as the stock intake.

 

^^ This

 

You can get the same results as the spring booster by pushing your throttle further for free. It doesn't do anything except change your throttle so that at 3/4 throttle it acts like full throttle.

 

It increases throttle sensitivity. That is all it does. Mine made the truck more drivable. I hate the throttle by wire delay and it seems Toyota has the biggest delay in have ever experienced. I could count to 5 before the truck actually responded and Toyota said it's in spec. Thankfully sprint booster fixed it.

 

My same year 2005 5-lug doesn't have any delay.

 

I was up in the Big Bear area and at elevation of 7200ft and as high as 8k ft last weekend and never noticed a driveability problem . I've got a K&N FIPK CAI and a TRD Supercharger with 4.5lbs boost and it ram great at that altitude

 

Did you ever run with the OEM box and filter? A supercharger alone would solve the drivability at high altitude. Forced induction is different and the charger will get the air it is requesting no matter what or it will collapse a duct or tear up a filter to get it. Try the factory OEM box on the charger and see what happens.

 

When I bought the truck from the original owner it already had the K&N FIPK CAI already installed so I don't have a stock air box to try out

 

I thought the sprint booster was a joke when i first heard of it. Now... wow people are actually paying for that.

It should be a late night infomercial, right after the one where using tape is too hard and people that cant use a corded phone without strangling themselves.

 

Its not your air filter thats helping.

 

Correct it's forced induction. That charger will get all the air it requires regardless of filter.