K N Intake Kits...Do they really give +13 HP ?

[mrgadway]

Has anyone ever dynoed their vehicle or verified K N claims of the horsepower gains they get with their intake kits ? I'm not sure if I believe them or not...thats alot of money for an airfilter and a bit of plastic tubing IMO.

[nikita]

If anything, short of a turbo or premium gas chip reprogram, gave that much increase, Toyota would have already done it. Be careful about dyno tests by magazines (which just happen to be full of K&N ads) and aftermarket manufacturers themseves. Unless corrected for temperature and barometric pressure, dyno charts are worthless, basically a fraud.

[mrgadway]

Yes, you brought some good points. I think maybe that KN sticker is what gives you that "feeling" that all that money you just spent on your intake system was worth it. They say the sticker alone is worth atleast 10-12HP

Seriously though , like you said ,I don't think Toyota wouldn't put all that design work into the 5.7 and shove some crappy intake design on it just to leave an extra 10-15 HP on the table. I mean look at the exhaust system alone...it looks like alot of good engineering went into the design and thats why I bought one. But it would be interesting to see an actual dyno run before and after that was not subject to possible "doctoring" ...I mean the curves they show and claim +12 HP @about 5100 RPM has much bigger gains lower and higher than that particular RPM. Plus I know its easy to make software changes on a dyno and get significant differences on paper.

[Dana_15]

I hate to say it but lets say the 5.7 really does have 381 horse at the flywheel (for arguments sake) and you had 10hp bumping it to 391 hp, that would be an increase of what 2.6% (unless my math is bad)...doubt you would ever notice it.

[stryker709]

Originally Posted by Dana_15

I hate to say it but lets say the 5.7 really does have 381 horse at the flywheel (for arguments sake) and you had 10hp bumping it to 391 hp, that would be an increase of what 2.6% (unless my math is bad)...doubt you would ever notice it.

I gotta agree with this. I had one on my taco, it seemed to improve throttle response a little, but mostly I just like the sound change. I doubt I'll get one on the tundra, 0-60 in seconds in a full sized 4x4 is plenty fast for me.

[wonger]

all aftermarket products say u can gain up to ( key word ) because u can.. but with the right combinations of other mods

intake can give a better throttle response and nice sound..

i would do it for the sound than anything else lol.. all the other crap about them.. doesnt really make much of a difference..

[mrgadway]

Wonger...you are sick ! Is that a R1 in your aviatar ? and a 06 S2000 to boot !! I drove a used 03 S2000 and was really close to buying but backed out at the last minute. I am an autocross addict and would love to have one just for that but for now will have to settle for my front drive four door. My 2 wheeler is an 06 Tuono recently bought to replace 03 gsxr1000...sweet bike but Tuono is more comfortable and lots of fun.

I took out the inner "air" filter in my Tundra over the weekend ( I guess its to trap hydrocarbon vapors so we don't have more "global warming" ..hahaha) How is a motor supposed to breath thru that mess ? Thats got to be worth the same as putting on a CAI from KN ! Oh yea, my vehicle is used just for closed course and never used on the street, I don't want any law suits for removing that filter.

[wonger]

Originally Posted by mrgadway

Wonger...you are sick ! Is that a R1 in your aviatar ? and a 06 S2000 to boot !! I drove a used 03 S2000 and was really close to buying but backed out at the last minute. I am an autocross addict and would love to have one just for that but for now will have to settle for my front drive four door. My 2 wheeler is an 06 Tuono recently bought to replace 03 gsxr1000...sweet bike but Tuono is more comfortable and lots of fun.

I took out the inner "air" filter in my Tundra over the weekend ( I guess its to trap hydrocarbon vapors so we don't have more "global warming" ..hahaha) How is a motor supposed to breath thru that mess ? Thats got to be worth the same as putting on a CAI from KN ! Oh yea, my vehicle is used just for closed course and never used on the street, I don't want any law suits for removing that filter.

haha thanks.. im new to riding.. dont even have a license yet or permit lol.. just ride my friends when i feel like it.. do like autocross but never done.. just dont have the money or time to try it yet... might hit it up sometimes with my friend who has an EVO MR
its a 2007 Honda CBR 600RR white in color. its a buddy of mines and i got to ride it around to get a feel for it
was in the market in getting one because 3 of them all got 07 600rr black. red. and white. now the 08s are out and want a RED but the 08 RED is different than the 07 which looks alot better now to me.. soo looking to get one around this time next year as the 09s come out i get the 08 for cheap

as far as the carbon filter.. i would too take those things out.. global warming is already happening and i dont think u can reverse.. oh well .. and you can gain some power and response in just taking the carbon filter out.. alot of new mustangs have them and dyno proven that taking them out does help in mpg and so on..

[mrgadway]

The CBR600 is really nice , actually they all are getting pretty sweet, especially the 1000's which I think are easier to ride since they have much more torque. But insurance and initial cost is gonna be higher unless you are old like me.

Man your S2000 needs nothing for autocross...even on cheap street tires those things can fly. You gotta try it, so much fun and completely legal !! We race out here by a huge parking lot right next to a sheriff station. They come over and check it out and are really good people ...I don't speed on the street near as much when I'm tearing it up on a closed course. Well unless I'm driving my new Tundra. What an engine that would be in a 2 seater rear drive sports car...are you listening Toyota ?? Can you say Corvette killer.

[EchoHoLiK]

Originally Posted by mrgadway

The CBR600 is really nice , actually they all are getting pretty sweet, especially the 1000's which I think are easier to ride since they have much more torque. But insurance and initial cost is gonna be higher unless you are old like me.

Man your S2000 needs nothing for autocross...even on cheap street tires those things can fly. You gotta try it, so much fun and completely legal !! We race out here by a huge parking lot right next to a sheriff station. They come over and check it out and are really good people ...I don't speed on the street near as much when I'm tearing it up on a closed course. Well unless I'm driving my new Tundra. What an engine that would be in a 2 seater rear drive sports car...are you listening Toyota ?? Can you say Corvette killer.

Yeah, the S2000 is good straight out of the box so to speak, and with some proper tires that car will hook


And I agree with your closing statement......that 5.7L V8 is dying to be put into a proper RWD sports car!!!

[wonger]

Originally Posted by mrgadway

The CBR600 is really nice , actually they all are getting pretty sweet, especially the 1000's which I think are easier to ride since they have much more torque. But insurance and initial cost is gonna be higher unless you are old like me.

Man your S2000 needs nothing for autocross...even on cheap street tires those things can fly. You gotta try it, so much fun and completely legal !! We race out here by a huge parking lot right next to a sheriff station. They come over and check it out and are really good people ...I don't speed on the street near as much when I'm tearing it up on a closed course. Well unless I'm driving my new Tundra. What an engine that would be in a 2 seater rear drive sports car...are you listening Toyota ?? Can you say Corvette killer.

22 living with parents ( not really because they work out of town and stay out there 5 days of the week ) i do what i want and work full time.. accords paid 2k for cash used 4-5 years ago.. s2k i got in augs of 06 and almost paid off. so next toy will be a cbr 600rr.. be a year till than.. and i can have 10k cash ready for it.. lol. and insurance.. is like 20-50$ a month if u insure it as a weekend toy

but toyotas not really into the RWD sports cars.. or even much into high power easy to customize sports cars.. compare to hondas.. and the scion lines suppose to take care of all that .. which to me is kinda weak

s2k just needs a set of nice tires and a wing.. autocross here i come.. hehe

[patricksd333]

Originally Posted by mrgadway

Has anyone ever dynoed their vehicle or verified K N claims of the horsepower gains they get with their intake kits ? I'm not sure if I believe them or not...thats alot of money for an airfilter and a bit of plastic tubing IMO.

The short answer is I doubt it. This truck was designed with some degree of performance in mind - i.e. exhaust manifolds, true dual exhaust (as opposed to y-pipe setup, etc). Because Toyota did a good job engineering this thing from the start, I doubt anyone would see 13 rwhp by just adding an intake.

Now, other vehicles are different. For example, I had a 2001 Camaro Z28 LS1. GM used a crappy intake and exhaust setup on it. So, installing an intake and catback could net 10-15 rwhp by itself. That is by no means a norm, but because the stock setup was so bad, aftermarket parts could wake it up.

Personally, I wouldn't waste my money on an aftermarket intake unless I was adding a supercharger, turbo, or making more than 450rwhp in some other fashion.

[mrgadway]

OK, the consense seems to shoot down the bucks for a K N but I am interested in trying a true dual exhaust kit all the way out. Again however the grand for a TRD exhaust seems high. I am thinking a local shop could make a dual kit which would exit both out the passenger side since the first look underneath looks like the fuel tank is probably gonna make it hard to exit on the drivers side although I see the TRD kit comes out the left and right sides.( Maybe thats why its pricey). I wonder what would be a reasonable amount to pay for a cat back dual exhaust custom made. Anybody have a idea ? And what sort of resonantor would work best since the stock one would have to go ?