2F Air Filter – FJ40 (01/75 – 06/80) FJ60 (08/80 – 07/87) Toyota Land Cruiser RL1249 (EN8-2F)

2F Air Filter – Toyota Land Cruiser
FJ40 (01/1975 – 06/1980)
FJ60 (08/1980 – 07/1987)

You do not hear many people talking about “performance” from a 2F Toyota engine, but here at Red Line Land Cruisers, our DNA is wrapped in 2F engine exploration! No, we will not make bodacious claims of 5 horsepower by simply swapping air filters. What we are monitoring on our 2F is AFRs! AFR or Air Fuel Ratio. So, let’s break that down…

The stoichiometric air-fuel mixture for gasoline fuel is about 14.7:1, meaning that 14.7 grams of air are required for every gram of fuel. The fuel flowing through your carburetor is “fixed” or tuned via the jets in conjunction with the air. The variable now is the air. Variable how? There are two ways: barometric pressure and elevation. Atmospheric pressure, also known as air pressure or barometric pressure, is the pressure within the atmosphere of Earth, and that fluctuation affects the “amount” of air or density level. I know, I know, we are talking tractor motors here! So what about elevation? Elevation does not care if your engine is a field plowing tractor or a Pikes Peak Hill Climb purpose-built race engine; for every foot of elevation gained, you’re losing power because you are “losing” air!

We are not racing Pikes Peak with our Land Cruisers? True. But, while many Land Cruiser owners live below 5,000 ft of elevation and rarely drive above 7,500 ft of elevation, here in Colorado Springs, the city’s downtown flat area is sitting at 6,035 feet, and we are not even in the woods yet until 8,000 feet. We have less “air” up here. It’s why you are breathing so hard when you drive up to visit our 14,115-foot peak of Pikes Peak. Your engine is just like your body. It needs air to function. As you drive up, you notice that the vehicle does not have the power at the top as it did down below due to the lack of air to mix with the fuel.

Air filters are restrictive, but they provide protection. Everything is measured on a sliding scale of benefits and trade-offs. Yes, there are less restrictive air filters than this one, but we do not recommend them for use on dirt roads or off-roading. Not unless you are looking to rebuild your valvetrain sooner than later. This particular air filter we use is the right combination of “flow” and “protection” for a 2F engine in an FJ40 or FJ60 being used as Land Cruisers should be used – IN THE DIRT.

We found this air filter to be one whole AFR numerical unit less restrictive than another filter we were using. Think of it as the equivalent of driving down about a thousand feet of elevation. At the same time, this filter offers the proper filtration needed and recommended by Toyota because this is the company that makes Toyota’s air filters for Land Cruisers – DENSO!

We have set up an ” AFR monitoring stand” to monitor the air/fuel ratio when tuning carbureted Land Cruisers. Carburetors are known to be finicky, so we must be fastidious about collecting actual data that can be scientifically analyzed. Numbers do not lie! We are not building hot rod race cars but want to keep vintage Land Cruisers great! Stacking tiny, minute details together makes for the best overall scenario!   

ALSO SEE:
Air Filter Canister Gaskets (2) Lid Gasket and Bottom Pan / Canister Gasket, FJ40 (1975 – 1980) – RL1211 A/B

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ALSO:
• 2F 30K Cap & Rotor TuneUp Kit for 1973 – 1987 Toyota Land Cruisers

• 2F Ventilation Kit FJ40 Toyota Land Cruiser RL1170.A/B