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Engine & DrivetrainDiscussions about the engine and drivetrain of your vehicle.
This is a discussion thread titled "K&N FIPK and TRD Duals", within the Engine & Drivetrain forum, part of the Technical & Vehicle Assistance Forums category.
How are you going to get increased gas mileage with an induction system that produces less hp and an exhaust that just makes more noise?
If there was a mileage increase, do you expect these things to ever pay for themselves (dreamer!) or are you just trying to find a way to sell the idea to your Mrs?
KLS,
Why the need for sarcasm? axlman is asking a valid question and you are speculating about his motives. I don't believe this forum is here to belittle people and intimidate those who have a legitimate inquiry.
axlman, I have noticed a very small (maybe .3-.5mpg at most) gain in mileage with the TRD duals. Of course any savings on a regular basis is clearly offset by the fact that since the Tundra sounds so sweet with the exhaust, you'll be lead-footin' it alot. I don't have the FIPK, but would guess that if a system (air intake, exhaust, etc...) is efficient and less-restrictive, it would inherently produce better performance (possibly in the form of increased mileage).
I have the TRD duels, and did not notice any mileage increase at all. But, they do look, and sound, good. Not too loud. Not too quite. Just right. Keep in mind tho, looks, and sound, is very subjective. All matter of opinion.
I do not have the FIPK. But, I did run K&N's drop-in for a while. Again, I did not notice any mileage increase, but the exhaust did get a little louder. Not much, but, noticable.
From what I have heard from many who has either one or both, neither the FIPK nor the TRD duals does nothing to improve MPG. And if it does, its a very small difference. They do boast some type of power boost but I think it isn't factual, other than the facts the manufacturer wants you to believe so that you'll buy their product. Don't shoot me for that, its just an opinion. It's been discussed thoroughly in the earlier days of this BB that the real power adder is something like a supercharger or NOS. Also, if you know you have TRD duals or FIPK, you're always eager for a little drag race. Your driving style changes too because you know you have a little something more than the stock truck next to you.......unless its a sleeper! Driving habits has a big effect on your vehicle's MPG.
Originally posted by 2DaMax Also, if you know you have TRD duals or FIPK, you're always eager for a little drag race. Your driving style changes too because you know you have a little something more than the stock truck next to you.......unless its a sleeper! Driving habits has a big effect on your vehicle's MPG.
Aint that the truth, I get about 15.5 mpg but hey, its a truck .
Originally posted by whizzer
...
I don't have the FIPK, but would guess that if a system (air intake, exhaust, etc...) is efficient and less-restrictive, it would inherently produce better performance (possibly in the form of increased mileage).
Don't guess. K&N had the Toyota 4.7 V8 dyno chart with their FIPK posted on their web site. It showed about a 2 hp loss up to about 3600 rpm. Above 4500 rpm there was a hp increase. Most of our driving is in that range <3600 rpm, so we'd show a gas mileage loss with the FIPK.
Originally posted by KLS It showed about a 2 hp loss up to about 3600 rpm. Above 4500 rpm there was a hp increase. Most of our driving is in that range <3600 rpm, so we'd show a gas mileage loss with the FIPK.
Ken
Bingo.
And the TRD duals won't do a lot of good, they still use that nasty factory Y-pipe. If you want to show an improvement in mileage, you'll have to get either true duals or a better Y-pipe and larger pipe after that.
Even then you're not going to see much. Most of the go-fast goodies for the Tundra add (or move) power up high, and that doesn't do a lot of good for mileage.
Live with it, you bought a truck. If you're after gas mileage, buy a Prius.
I have both the FIPK and TRD duals, and I'm very happy with both. You can hear the FIPK when you step on it, but when cruising steady it's quiet. As for the duals, they seem a lot louder on the inside of the vehicle rather than what people hear on the outside. It's because the TRD resonator and muffler sits just beneath the passenger seat and creates a loud resonance through the cab floor. Don't get me wrong, it still sounds good and you do get a little more power and better throttle response. I've always believe if your going to to one, you have to do the other, because the more air you let in, you need to let out. Vice-versa.
I have the FIPK with true dual 40 series Flows, installed by Austin's Pro-Max.
Sounds excellent.
At idle to around 2,000, it's very strong and aggressive .
From 2 until around 3, it has that "classic flowmaster" sound.
Up from there it just screams.
Unless you want it really loud, don't go with 40 series flows.
Otherwise, knock yourself out, you won't be disappointed.
This is to all you guys who are wondering about how the K & N induction, TRD or Borla pipes sound, I HIGHLY recommend that you make an effort to attend our next minijam and find out with your own eyes and ears. There's nothing like seeing or hearing it yourself in person, I gotta say. I was really impressed with both the sound and the tone of the TRDs and the "giant sucking sound" of the K & N induction system that I heard at the Dockweiler beachjam that we had last month. I also got a good look at what I've read and wondered about re: lifting your Tundra's front end with spacers and/or coilovers, not to mention all the other cool mods folks have done. P.S. added bonus......besides viewing some great rides and mods, you also get to meet and break bread with some really, really cool people.
HighrideTundra......Big Bear's not far enough away from Moorpark for you to miss this opportunity to check things out. You might consider signing up in the Calif. forum. I know everyone would like to meet you, too.
And for anyone who's out there elsewhere and are too far away from the meets that are scheduled, it doesn't take a lot of effort to find a place near you and put together your own local minijam. Definitely use this forum to your advantage. Anyway, just thought I'd suggest something that you guys might want to consider so you can cut to the chase.
K&N FIPK and TRD Duals
Driving habits has a big effect on your vehicle's MPG.
but hey, its a truck 
.
