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Engine & DrivetrainDiscussions about the engine and drivetrain of your vehicle.
This is a discussion thread titled "Calling all you filter & airbox experts!!", within the Engine & Drivetrain forum, part of the Technical & Vehicle Assistance Forums category.
I know this topic has been discussed before, but I want to confirm my thinking on what I have experienced.
I have an '05 Sequioa and put in the TRD air filter at about 1,000 miles. I now have about 14,500 miles on the odo and I am much more comfortable with how my ride performs under my normal driving conditions and with different fuels.
The other day I was checking fluids and decided to check the TRD filter. I noticed that it seemed dirty (from my memory of how it looked new) so I yanked it out and replaced it with the stock filter, which is basically brand new. I set the TRD filter aside, intending to order the clean & re-charge kit for it. After driving it a few days now with the stock filter back in there, I am surprized that it feels different. Since I am much more experienced with how my engine performs, it seems like I have a tad more low-end torque and it seems to breathe easier at higher revs. It's not dramatic and it is hard to describe. I usually run 91 octane, but sometimes fill up with 89 ethenol blend and I definately can feel the difference with the higher octane fuel. That is how I can best describe it. It equates to about the difference in performance between those two octane fuels in terms of what I am exeriencing with the stock filter back in.
Given all that.......is it logical to assume that the TRD filter was restricting flow compared to the stock filter?
Has anyone had this experience? I'm considering giving up on the TRD filter and not spending any money on the cleaning kit and just going with the stock filter.
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05 Sequoia 4x4 Ltd. Phantom Grey Pearl, Weld 20" wheels on Toyo tires, MagnaFlow cat-back, Amsoil fluids, custom 15" overhead DVD system, Eclipse NAV system w/camera, Sirius tuner. DLS Nobelium components and coaxials, TRU B-2110 and H-1 amps, 13" eD sub, iPod hookup. SilverStar lamps.
The Toyota V8 engine is a touchy little TeRD. Since I don't see that you have headers it may work better with the OEM filter versus a more flowing filter.
However you should also clean your TRD filter between 10 and 15k miles to keep the flow rate up. You have had it in your truck for almost 14k miles so you are due for a cleaning and the OEM filter may actually flow better right now because you have a dirty filter. Get the kit and clean it and then decide.
Good luck.
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08 Silver Crewmax 5.7 4x4 SR5... ICON, CAMBURG, ALCAN, RBP, TOYO, ECLIPSE, SAVV, FOSGATE, KICKER, JL AUDIO, V-LEDS, PIAA, HELLA www.wheelersoffroad.com for all your suspension needs!!!
Has anyone tried True Flow foam filters? I recently saw a demonstration as was surprised out how much dirt and particles if caught from going into the intake. I'm thinking of switching my TRD filter for a True Flow.
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2003 Tundra Imperial Jade TRD offroad Performance modifications
2.5 Camburg C/O w/ King 14" 600lb springs, Skidrow Automotive Skidplate
285x75x16 Goodyear Wrangler ATS, 16x8 Ivan Stewart Wheels
4.30 ring and pinion gears, Stock exhaust w/ Magnaflow 18" muffler, TrueFlow filter, Superlift TruSpeed Cosmetic modifications
Debadged, De-decaled and De-labeled sun visors
Pace Edwards Retractable Cover, Toyota Sport Grille
TRD radiator cap, TRD oil cap
RS 3200 Plus Upgrade Modification wishlist
TRD or JBA titanium headers
JBA or possible custom y-pipe
TRD supercharger
IPT valve body mod
Custom Offroad Bumper
Demello offroad sliders
rear disc conversion
Moonroof and power sliding rear window
Where does it ever end
Stock filter actually does flow better than the TRD
Quote:
Originally Posted by czechm8
I know this topic has been discussed before, but I want to confirm my thinking on what I have experienced.
I have an '05 Sequioa and put in the TRD air filter at about 1,000 miles. I now have about 14,500 miles on the odo and I am much more comfortable with how my ride performs under my normal driving conditions and with different fuels.
The other day I was checking fluids and decided to check the TRD filter. I noticed that it seemed dirty (from my memory of how it looked new) so I yanked it out and replaced it with the stock filter, which is basically brand new. I set the TRD filter aside, intending to order the clean & re-charge kit for it. After driving it a few days now with the stock filter back in there, I am surprized that it feels different. Since I am much more experienced with how my engine performs, it seems like I have a tad more low-end torque and it seems to breathe easier at higher revs. It's not dramatic and it is hard to describe. I usually run 91 octane, but sometimes fill up with 89 ethenol blend and I definately can feel the difference with the higher octane fuel. That is how I can best describe it. It equates to about the difference in performance between those two octane fuels in terms of what I am exeriencing with the stock filter back in.
Given all that.......is it logical to assume that the TRD filter was restricting flow compared to the stock filter?
Has anyone had this experience? I'm considering giving up on the TRD filter and not spending any money on the cleaning kit and just going with the stock filter.
Because of all the folds in the stock filter, there's about 1000 sq inches of surface area. The TRD filter has only about half that. So although the TRD's gauze has more porosity (less resistance) per square inch of surface, the hugely greater surface area of the stock filter more than makes up for its lower porosity. The net effect is the stock filter has less overall resistance to airflow and does indeed produce slightly better power. One TS member did back to back 1/4 mile runs with the K&N drop in (very similar to the TRD drop in) versus the stock filter and got slightly lower ETs with the stock filter.
Of course, the stock filter is much more efficient at removing fine particulates (because it has smaller pores). And unlike the TRD (and all other oiled gauze filters), it also won't shed oil onto the MAF and gum up the sensor wires.
__________________ Ray
Natural White '03 Access Cab V8 SR5 4X4 with TRD Off Road Suspension, Limited Slip Differential, and Towing Package
Towing & Performance Mods: JBA Headers, Gibson Muffler, 4.30 gears, Michelin LTX M/S Tires, Hellwig Anti-Roll bar, Prodigy Trailer Brake Controller, Autometer Z-Series Transmission Temperature Gauge, Magnefine Transmission Filter
Utility & Misc Mods: Genuine Toyota OEM Step (Nerf) bars, Peragon Tonneau Cover, TracRac Rack and Rail System, Muth Signal Mirrors, Pop&Lock tailgate lock, TruSpeed speedometer calibrator, "$20" RS-3200 Upgrade, Auto-Dimming mirror w/ Temp and Compass, Clear/Red/Clear Taillights with Silverstar Signal bulbs, 3M Clear Bra
Because of all the folds in the stock filter, there's about 1000 sq inches of surface area. The TRD filter has only about half that. So although the TRD's gauze has more porosity (less resistance) per square inch of surface, the hugely greater surface area of the stock filter more than makes up for its lower porosity. The net effect is the stock filter has less overall resistance to airflow and does indeed produce slightly better power. One TS member did back to back 1/4 mile runs with the K&N drop in (very similar to the TRD drop in) versus the stock filter and got slightly lower ETs with the stock filter.
Of course, the stock filter is much more efficient at removing fine particulates (because it has smaller pores). And unlike the TRD (and all other oiled gauze filters), it also won't shed oil onto the MAF and gum up the sensor wires.
Thanks for confirming my thoughts on this Ray! I think this may be one of those things I just leave stock. Toyota seemed to have got this one right! I'm sure there is much more engineering behind the stock box and filter than we all realize.
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05 Sequoia 4x4 Ltd. Phantom Grey Pearl, Weld 20" wheels on Toyo tires, MagnaFlow cat-back, Amsoil fluids, custom 15" overhead DVD system, Eclipse NAV system w/camera, Sirius tuner. DLS Nobelium components and coaxials, TRU B-2110 and H-1 amps, 13" eD sub, iPod hookup. SilverStar lamps.
Has anyone tried True Flow foam filters? I recently saw a demonstration as was surprised out how much dirt and particles if caught from going into the intake. I'm thinking of switching my TRD filter for a True Flow.
I have had one in for 30k miles. I like foam filters, I run them in my bikes and cars. They performe well and when you use TwinAir filter oil it is actually dry and tacky when it goes in the truck so you don't have to worry about getting oil on the MAF.
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08 Silver Crewmax 5.7 4x4 SR5... ICON, CAMBURG, ALCAN, RBP, TOYO, ECLIPSE, SAVV, FOSGATE, KICKER, JL AUDIO, V-LEDS, PIAA, HELLA www.wheelersoffroad.com for all your suspension needs!!!
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Calling all you filter & airbox experts!!
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