Mpg

[NMTTDAVE]

Thanks "notevenclose" ! you sound pretty knowledgeable about this stuff. Now I just spent 30K + on this truck and don't want to put a lot more money into it, but what would a cold air intake cost, approx? And I can't take the cat. converter off, we have emmission tests here, but would Dual exhaust really help with MPG and would it be worth it?

[notevenclose]

Originally Posted by NMTTDAVE

Thanks "notevenclose" ! you sound pretty knowledgeable about this stuff. Now I just spent 30K + on this truck and don't want to put a lot more money into it, but what would a cold air intake cost, approx? And I can't take the cat. converter off, we have emmission tests here, but would Dual exhaust really help with MPG and would it be worth it?

Cold air intakes do work. The main idea here is to cool the inlet air as much as possible by drawing fresh air outside of the engine compartment. Cool air is more dense so you don't have to push the pedal as hard to get power.

Think of it this way: combustion is BASICALLY 25 parts air + 2 parts gas at like 25% throttle. Now, if you have cooler air at the same throttle, it is more dense so now you have 35 parts air. With this extra air, your computer will add fuel(to prevent lean combustion) and make you go faster at 25% throttle...so now you get the same amount of power at, say, 22% throttle with a CAI as you did before without it.
Make sense? Sorry this is kinda technical! There are tons of CAI out there! You're gonna want the one that has the best filter and gathers the coolest air. Until someone does a definitive study USING THE TUNDRA, we may never know which one is best.

Duals wouldn't help enough to offset the cost. Plus, you're gonna have your foot in it so you can hear it!

[infieldonly]

Not sure about the tundra. But I use to run a Tornado style unit in my Accura Integra about 8 years ago, and it actually did improve HP. Mainly use it for the HP at the track. It does make your intake smaller, but it swirls the air, (hence the Tornado name) which makes the air enter the engine easier. The best example to see for your self is to take a 2 litter bottle of water and tape another empty 2 litter bottle to the opening. Then flip the setup over and watch how long it takes the water to go from one bottle to the next. Next, retrofit the tornado inbetween the 2 bottles and do the same test. The water, with no air hole in the bottle, flows into the bottom bottle with a funnel kind of flow very fast. Not to say this will work with the Tundra, but the application does work to some level. It was only 2 more HP on the dyno, but 2 HP in racing, is more than 0 HP.

[UndraDog]

Anyone compare milage without a tailgate? Since it is so easy to remove.

[notevenclose]

Originally Posted by UndraDog

Anyone compare milage without a tailgate? Since it is so easy to remove.

I thought I saw this one on mythbusters as well. I understood that it actually made your mileage decrease. Has something to do with aerodynamic drag...

[infieldonly]

Originally Posted by UndraDog

Anyone compare milage without a tailgate? Since it is so easy to remove.

One thing most people don't know about removing a tailgate, (seen this on Mythbusters) When you remove the tailgate, you change the air flow from flowing over the truck and tailgate which it was enginered to do, to flowing over the truck and acctually pushing down on the bed of the truck which increases drag. Very little drag is created by hitting a closed tailgate. Just sit in the bed of a truck while someone is driving and see how much wind hits you, very little I suspect. You create even more drag when you open the back window. Mythbusters did a whole segment on this.

I was typing when you posted notevenclose. You nailed it.

[Mickey]

Saw mythbusters proved this with a dodge truck

[upscountryboy]

Well all this talk about MPG and nobody has posted what they're getting.... I have an 08 that has almost 2000 miles on it now and I'm averaging 14.2 - 14.5 around town...... haven't been on a trip yet..... What are ya'll gettin?????

[ramoine]

Originally Posted by NMTTDAVE

Has Anybody Tried A Tornado Fuel Saver, It's suppossed to get you 2 or 3 MPG more. I found one for my 08 5.7 liter for $50 on line.

The thread is mis-leading . This is what he was asking about .

[ramoine]

Oh , I'm getting about 13.5 city and highway , mostly city driving though .

[RunItHard]

Originally Posted by ramoine

Oh , I'm getting about 13.5 city and highway.

That's because you're smoking those back tires all the way down the street...LOL

[sxd45]

I went on a trip and got 18, then again I drive like a maniac!

[ramoine]

Originally Posted by RunItHard

That's because you're smoking those back tires all the way down the street...LOL

LMAO , yeah that's probably effecting my mpg !

[mango65]

Love my truck but not inpressed with mpg. 13.7 is what info center says and thats babying it around town. 08 DC 5.7 4X4

[mr-chessie]

I have only had mine for a week but have checked it twice and I am getting right at 16 mpg driving mostly country roads with a little town driving mixed in both times. Happy with that so far. However, I have the 4.7 V8 not the big boy like most of you.