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Engine & DrivetrainDiscussions about the engine and drivetrain of your vehicle.
This is a discussion thread titled "K & N Fipk", within the Engine & Drivetrain forum, part of the Technical & Vehicle Assistance Forums category.
I have read mixed post concerning this product at different sites. Most are positive though. What have been your experiences with this K & N add on.
Thanks
I had it on my truck for about 2 months. Made my truck sound like it had dual exhaust when I hammered on it. Made no difference in fuel economy. Also, I think I lost a bit of torque. So I sold it on ebay for a loss. Do not make the same mistake I did. The way I look at it is.....Toyota spends millions developing their engines. I'm sure that many hours were put into the design of the airbox and many tests done. Who am I to go and change all that? I'm sure the factory air box is just fine, especially in our trucks. Just but a K&N drop in filter. I did and then I noticed a bit of incresed economy. Just my 2 cents. Good Luck.
I do not necessarily buy that Toyota designed the air intake system to provide the BEST solution possible. Remeber that MOST folks do not push their trucks to the rpm limits. Also, the ECU is tuned to provide performance at a VARIETY of environmental conditions (altitude, temp, etc). This alone should tell you that the air intake system is not optimized for high rpm's in a race-like environment.
Having said that, however, I do concur that the FIPK does cause you to loose a HP off of the low end, but this is offset at the mid and upper rpms, where you get a few extra ponies and the "Nascar sound" as it were.
All depends upon what you are looking for.
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Originally posted by TMS2U I do not necessarily buy that Toyota designed the air intake system to provide the BEST solution possible. Remeber that MOST folks do not push their trucks to the rpm limits. Also, the ECU is tuned to provide performance at a VARIETY of environmental conditions (altitude, temp, etc). This alone should tell you that the air intake system is not optimized for high rpm's in a race-like environment.
Having said that, however, I do concur that the FIPK does cause you to loose a HP off of the low end, but this is offset at the mid and upper rpms, where you get a few extra ponies and the "Nascar sound" as it were.
All depends upon what you are looking for.
That is true, but the Tundra is not meant to be raced. We are not talking about a sports car. Most people buy them to haul stuff not haul ***. I am sure that you are right, it is not optimized for high RPM's but it is not really possible because of the automatic. If it was a V8 with a 5 speed or 6 speed, that would be different, maybe. If it were a sports car and the upper rpm's we what you want to be in, I would agree, but since it is a truck, all it does is make you lose bottom end and make noise. Waste of money in my opinion. Since we have a cammed engine and not a pushrod, I need all the bottom end I can get.
I guess I am comparing my car which is a mustang to a new mustang. I have an 86 with the 5.0 pushrod engine. If you compare it to a 4.6 Modular engine, it blows the modular away with low end torque. Now I realize that the 5.0 and 4.6 are different, but they are comparable since they are within .4 liters. I'm sure the Toyota puts out some good low end torque, I should know, my tires want to break loose all the time. Take a look at the Corvette Z06. Pushrod and 405 hp. Same thing with the Viper. over 8 liters and 500 hp, and over 500 lbs of tiremelting torque. In my opinion, for a sports car with good low end torque that is naturally aspirated, pushrods are the way to go. Sure multiple camshafts are the way of the future, but I will always have a love for the pushrod motor. That's why almost all of the 5.0 mustangs that win drag race after drag race that pull 8.0 seconds in the quarter are pushrod. That and the modualr aftermarket is almost non existent. I'll bet the tundra would scream with a set of ported heads, that and perhaps a free flowing intake.
Wow... I have never heard that the Filter Charger kit makes you lose low end? What makes you guys dought this 300$$ upgrade is not going to do what K&N says it's going to do? I would love to read more about this if anyone has any resourses, please pass them along...
Originally posted by Ohno5point0 That is true, but the Tundra is not meant to be raced.
Hence the need for modifications IF you do want to TRY to be a racer. If you have a 4x4 and are into prerunner style of romping, you will be spending ALOT more time at 3500 rpm than at 2000 rpm- and the upper rpm range is where the kit is helpful.
Quote:
We are not talking about a sports car. Most people buy them to haul stuff not haul ***. I am sure that you are right, it is not optimized for high RPM's but it is not really possible because of the automatic. If it was a V8 with a 5 speed or 6 speed, that would be different, maybe. If it were a sports car and the upper rpm's we what you want to be in, I would agree, but since it is a truck, all it does is make you lose bottom end and make noise. Waste of money in my opinion. Since we have a cammed engine and not a pushrod, I need all the bottom end I can get.
My initial point exactly
I think we are saying basically the same thing from different points of view!!
Quote:
Originally posted by zsp Wow... I have never heard that the Filter Charger kit makes you lose low end? What makes you guys dought this 300$$ upgrade is not going to do what K&N says it's going to do? I would love to read more about this if anyone has any resourses, please pass them along...
Do a search of the old threads on "FIPK" and you will find ample reading. $300 is too high BTW, more like $225
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Originally posted by scdanny I have read mixed post concerning this product at different sites. Most are positive though. What have been your experiences with this K & N add on.
Thanks
I have the FIPK on my '02 Ltd and love it. It has worked perfectly from day one. I drive my truck on the freeway and don't tow anything or race from stop lights. I have all the power I need to enter the freeway or pass cars w/ease. Do you lose low end torque w/it...? Yes. To what degree I don't know.
I can tell you that since I installed Tremo's RAP system for the FIPK, my truck has regained all the low end power the FIPK supposedly makes you lose and more. I have a lot more throttle response @ 1800- 2200 rpms or 30-40 mph. This kit is well worth the money. I highly recommend it if you have the FIPK installed already. JB
I too like the FIPK. I did some side-by-side 1/4 mile testing using the stock air box, the stock air box and my Ram Air Performance System, and the K&N FIPK (got rained out before I could test FIPK and my RAP system) and I posted the results here:
FIPK performance gain over stock: 0.317 (over 3/10ths) and 1.93MPH.
I guess it may depend on where you live and how you drive as to what you get out of it. For me up here at 5000+ feet, it works very well...even better when you install my RAP system!
Seee-ya!
Jim.
__________________ Base: '02 Tundra SR5 Imperial Jade Mica 4WD w/ TRD Off-Road, EVP Convenience & Tow Packages, Oak Interior & Captains Chairs, 6 Speaker/6-Disk CD, VIP 3K, Chrome Wheel Locks, & Anti-lock Brakes with DRL Mods: K&N FIPK II, Ram Air Performance System (RAPS), Unichip, Ivan Stewart Flares and TRD Grille, 2" Cornfed Front Suspension Lift (How-To Guide), BFG A/T 265/75's, Hellwig Rear Anti-Sway Bar (How-To Guide), JBA Headers & 2" Highflow Y-Pipe, 2.5" Exhaust Cutout with QuickTime Performance Electric Cutout (QTEC), Flowmaster 50 Series™ Delta Flow® Performance Muffler with Dual 2.5" x 18" Chrome Tips, ASP Racing Underdrive Pulley, PPD Billet Goodies, Rhino Liner, Tinted-windows, etc. Planned: My Tundra is done for now. Next up: Build new 400ci for my '69 Pontiac Custom S
I still find opinion pretty devided! It's like the Exahust thing everyone has a differance of opinion on what works for them. Now I have an FIPK and I think it's ok. I don't think it was worth the Money. But it seems to help me tow my stuff out to the Desart.
Now has anyone tried a FIPK with a supercharger and or Headers? Low end power is what it's all about for me. If I never get over 80mph I'm good witht that. I do alot of towing so any thing to help out is great.
I've made the mistake of purchasing too much at once guys. My '02' TRD 4X4 was bumped up a notch 5,000 miles ago when I put the TRD supercharger kit under the hood. I also installed the complete K&N intake with heat shield and everything at the same time. The next morning I completed the job of installing the upgraded computer that came with the SC kit. Inside the plastic, static-gaurded, sealed pouch containing the "brain" were a few pages of instructions and, to my suprise, a warning that" ALL WARRANTIES WILL BE VOIDED BY USING ANY AFTERMARKET INTAKE/AIRFILTER SYSTEMS WITH THE SUPERCHARGER". It sure would have been nice to know that before I spent $215 for something I can't use!
(Couldn't resist driving it to work 2 days before going back to the stock box with a K&N drop in element.)
There was a noticeable drop in performance going back to the stock box. And yes the check engine light went out all by itself after a day or two, (ooops).
Toyota says the reason is that the air flow sensor in the intake tube was not designed with the expectation that so much air would ever go past it. The K&N simply works too well. The sensor/computer just reach their limits of programing before the supercharger stops sucking big wind which results in dangerous "leaning" of the mixture.
Hope this helps someone
Very interesting. I didn't know that there was a warning that you get when you get your supercharger. I am sure glad I'm keeping all my stock parts.
Kinda funny though it's the same thing that happend when I first got my fipk kit. The tude was desinged wrong. After figuring this out I called K&N. They shiped me out a new tube and everything has ran great.
The warning was packed with the computer and not mentioned in any other instruction. (30+ pages worth!). I talked with the Toyota techs before ordering the SC and they thought the Intake was a good idea. Apparently they didn't know either. I had to go waayyy up the chain to find someone with an explaination for the warning. I'm hanging onto my K&N components with the hope that someone will develop a new program or air sensor that can deliver the amount of fuel required to keep the mixture right.
BTW, the SC is working GREAT. Pulls like a bear at any speed. It does seem to run out of fuel above 109 mph though,(not that I would drive that fast). That may be related to the same airflow sensor/ fuel mixture limitation.
Also, with the cruise set on 60 for a 100 mile trip over rolling countryside I've gotten 20.8 mpg. Turn the cruise off though and I'm back to 17-18mpg.
K & N Fipk
If you have a 4x4 and are into prerunner style of romping, you will be spending ALOT more time at 3500 rpm than at 2000 rpm- and the upper rpm range is where the kit is helpful.
Re: K & N Fipk
