Increased MPG or HP anyone???? - Page 3 - Toyota Yaris Forums

Kaotic Lazagna · 12-17-2006, 12:37 AM

i'm not going to act like i know everything mechanically with a car, but i can tell you with experience that an intake does increase your gas mileage. when i had my GTI, it had a Neuspeed intake on it, and on almost a full tank, i got between 360-400 on the full tank. however, in order to pass smog, i had to spend over 200 bucks for an OEM intake box. with that installed, i could only get between 320-360 on the full tank. all of this i calculated by using the trip-ometer and dividing the miles by the number of gallons it took to fill up. keep in mind, i drove very conservatively (really feathered the throttle when ever i had the chance to).

as for my Yaris, full tank calculations = avg. 45 mpg. but one time, on a 1/4 tank estimate, i got 62.something mpg. does anyone here know if the fuel guage is set to "drop" slower when it's full? i noticed that when i get to the half-way mark, the bars tend to disappear quicker.

eTiMaGo · 12-17-2006, 03:30 AM

Quote:

Originally Posted by Kaotic Lazagna

i got between 360-400 mpg. however, in order to pass smog, i had to spend over 200 bucks for an OEM intake box. with that installed, i could only get between 320-360 mpg.

OMG the car to end our dependency on crude oil!

Kaotic Lazagna · 12-17-2006, 04:04 AM

Quote:

Originally Posted by eTiMaGo

OMG the car to end our dependency on crude oil!

holy crap, should have proof read that. i meant full tank, not mpg. see what happens when you're sick, plus studying for finals...i'll go back and edit that.

swng · 12-17-2006, 06:20 PM

Quote:

Originally Posted by Kaotic Lazagna

...............does anyone here know if the fuel guage is set to "drop" slower when it's full? i noticed that when i get to the half-way mark, the bars tend to disappear quicker.

Your observation is very valid. Please see:
http://www.yarisworld.com/forums/showthread.php?t=2692

When we try to find out if a modification really improves the car's fuel economy, your observation and what have been discussed in the linked thread must be taken into consideration. I would say scangauge and/or trip computer indications, or in the absence of them, long term average numbers (with methods like : https://www.fueleconomy.gov/mpg/MPG.do?action=calcMPG) are more reliable than the fuel gauge bars.

Kaotic Lazagna · 12-17-2006, 07:22 PM

Quote:

Originally Posted by swng

Your observation is very valid. Please see:
http://www.yarisworld.com/forums/showthread.php?t=2692

When we try to find out if a modification really improves the car's fuel economy, your observation and what have been discussed in the linked thread must be taken into consideration. I would say scangauge and/or trip computer indications, or in the absence of them, long term average numbers (with methods like : https://www.fueleconomy.gov/mpg/MPG.do?action=calcMPG) are more reliable than the fuel gauge bars.

thanks, i did notice that my friends' cars do the same...oh, and i use the second method said in your second link. i'm not very good with words, so i made my description very long...lol.

Mr.Yaris · 05-27-2007, 10:33 AM

Quote:

Originally Posted by Kaotic Lazagna

does anyone here know if the fuel guage is set to "drop" slower when it's full? i noticed that when i get to the half-way mark, the bars tend to disappear quicker.

The reason is likely in the tank's shape & design. My Camaro and my wife's Trans Am are both the same way. When the gas gauge reads 3/4 tank, it's really @ 1/2 tank, and once it reaches that mark, it drops quicker and quicker. When it's at 1/4 tank, you're pretty close to Empty, closer to 1/8 tank. I'm sure the Yaris is the same way. I've noticed this as well with my Yaris, and I'm sure if i asked my wife, she'd tell me her Yaris was the same way (yes, we have two Yarises. They're our "daily drivers" and the Camaro & T/A are our "weekend toys"...)

swng · 12-17-2006, 07:28 PM

You are welcome!
BTW, we all make long posts occasionally. I am trying to make this one short but I am limited by my poor ability

.
Enjoy your modifications and happy posting!

Kaotic Lazagna · 12-17-2006, 07:37 PM

Quote:

Originally Posted by swng

You are welcome!
BTW, we all make long posts occasionally. I am trying to make this one short but I am limited by my ability

.
Enjoy your modifications and happy posting!

lol...yeah. btw, do you know where i can get/order a Belta badge?

swng · 12-17-2006, 07:47 PM

Quote:

Originally Posted by Kaotic Lazagna

lol...yeah. btw, do you know where i can get/order a Belta badge?

I am afraid I don't. My main interest is fuel economy (you know, the mpg thing)

.
May be you can try moving your question to a thread where people discuss subjects like this (I mean, Belta badge) and I am sure you will get a reply from someone helpful and in the know

.

Kaotic Lazagna · 12-17-2006, 09:19 PM

i looked all over the Internet, and can't seem to find any place that sells Belta badges...

swng · 12-18-2006, 02:27 AM

Quote:

Originally Posted by Kaotic Lazagna

i looked all over the Internet, and can't seem to find any place that sells Belta badges...

I am sorry that I cannot be more helpful. Please try posting your queston in the sub forums for cosmetic modifications or classifieds. IMHO, you are asking it in the right forum but the wrong thread. There is no need to get off topic here, no matter how accommodating fellow members are

.
You may get some useful replies from those sub forums. Prepare to be surprised by how knowledgeable many fellow members are. You know, this is the ultimate site

!

Kaotic Lazagna · 12-18-2006, 02:45 AM

Quote:

Originally Posted by swng

I am sorry that I cannot be more helpful. Please try posting your queston in the sub forums for cosmetic modifications or classifieds. IMHO, you are asking it in the right forum but the wrong thread. There is no need to get off topic here, no matter how accommodating fellow members are

.
You may get some useful replies from those sub forums. Prepare to be surprised by how knowledgeable many fellow members are. You know, this is the ultimate site

!

will do...thanks.

Mr.Yaris · 05-27-2007, 10:49 AM

To those arguing about whether mpg goes up with certain mods, I can assure you, minor bolt-ons DO, in fact, increase mpg, and here's why. Certain mods, like CAI, lightweight pulleys, lightweight wheels, etc. help the engine work less to achieve the same power. With CAI, the engine doesn't have to waste as much HP sucking the air through a restrictive filter. Instead, it breathes easier, and therefore less power is wasted doing so, which translates to better mpg. Adding a lightweight pulley and/or wheels reduces rotating mass, and once again, allows the engine to produce the same amount of power with less work, and thus better gas mileage is the result.

People who say otherwise don't know their butt from a hole in the ground. I've modified a number of cars, and most well-known to me are the Camaro and Trans Am that my wife and I own. When I first started modifying these cars with the smaller "bolt-ons"- CAI, pulleys, headers, exhaust, spark plugs & wires, etc., I noticed not only did these cars make more power, but they got better gas mileage. It wasn't until I started doing other mods that lowered my gas mileage- bigger injectors, camshaft, ported heads & intake, reprogrammed computer, rear axle gears, etc. There's a very clear difference between mods that help an engine MAKE MORE POWER, and mods that help an engine WORK LESS AND MAKE THE SAME POWER WITH LESS WORK/RESISTANCE.

I heard someone got better mileage by changing their oil. I will back this member up. I've seen it first-hand, and I can tell you it's because of the same reason that CAI, pulleys, etc. help improve mpg. Premium-quality oils = better engine lubrication = less resistance & wear on engine internals = less work the engine has to waste on simply running.

Now, some people claiming that just one of these mods improves their mileage by 4-5 mpg or more makes me raise an eyebrow of doubt to their claim, however, it's most certainly believeable if you did several of these mods- oil, CAI, pulleys, etc., you would definitely see a 4-5 (or more) mpg increase.

12-17-2006, 12:37 AM	#1
Kaotic Lazagna View User's Garage Drives: '14 GT86, '08 Vitz Join Date: Dec 2006 Location: Central Valley, CA Posts: 9,873	i'm not going to act like i know everything mechanically with a car, but i can tell you with experience that an intake does increase your gas mileage. when i had my GTI, it had a Neuspeed intake on it, and on almost a full tank, i got between 360-400 on the full tank. however, in order to pass smog, i had to spend over 200 bucks for an OEM intake box. with that installed, i could only get between 320-360 on the full tank. all of this i calculated by using the trip-ometer and dividing the miles by the number of gallons it took to fill up. keep in mind, i drove very conservatively (really feathered the throttle when ever i had the chance to). as for my Yaris, full tank calculations = avg. 45 mpg. but one time, on a 1/4 tank estimate, i got 62.something mpg. does anyone here know if the fuel guage is set to "drop" slower when it's full? i noticed that when i get to the half-way mark, the bars tend to disappear quicker. Last edited by Kaotic Lazagna; 12-17-2006 at 04:05 AM. Reason: sick and tired...need to proof read things =P

12-17-2006, 07:28 PM	#7
swng Drives: 06 3-dr auto RS Join Date: Jan 2006 Location: BC Posts: 1,051	You are welcome! BTW, we all make long posts occasionally. I am trying to make this one short but I am limited by my poor ability. Enjoy your modifications and happy posting!

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12-17-2006, 09:19 PM	#10
Kaotic Lazagna View User's Garage Drives: '14 GT86, '08 Vitz Join Date: Dec 2006 Location: Central Valley, CA Posts: 9,873	i looked all over the Internet, and can't seem to find any place that sells Belta badges...

05-27-2007, 10:49 AM	#13
Mr.Yaris Drives: 2007 "Flint Mica" S-Type Join Date: May 2007 Location: Lawrence, KS Posts: 34	To those arguing about whether mpg goes up with certain mods, I can assure you, minor bolt-ons DO, in fact, increase mpg, and here's why. Certain mods, like CAI, lightweight pulleys, lightweight wheels, etc. help the engine work less to achieve the same power. With CAI, the engine doesn't have to waste as much HP sucking the air through a restrictive filter. Instead, it breathes easier, and therefore less power is wasted doing so, which translates to better mpg. Adding a lightweight pulley and/or wheels reduces rotating mass, and once again, allows the engine to produce the same amount of power with less work, and thus better gas mileage is the result. People who say otherwise don't know their butt from a hole in the ground. I've modified a number of cars, and most well-known to me are the Camaro and Trans Am that my wife and I own. When I first started modifying these cars with the smaller "bolt-ons"- CAI, pulleys, headers, exhaust, spark plugs & wires, etc., I noticed not only did these cars make more power, but they got better gas mileage. It wasn't until I started doing other mods that lowered my gas mileage- bigger injectors, camshaft, ported heads & intake, reprogrammed computer, rear axle gears, etc. There's a very clear difference between mods that help an engine MAKE MORE POWER, and mods that help an engine WORK LESS AND MAKE THE SAME POWER WITH LESS WORK/RESISTANCE. I heard someone got better mileage by changing their oil. I will back this member up. I've seen it first-hand, and I can tell you it's because of the same reason that CAI, pulleys, etc. help improve mpg. Premium-quality oils = better engine lubrication = less resistance & wear on engine internals = less work the engine has to waste on simply running. Now, some people claiming that just one of these mods improves their mileage by 4-5 mpg or more makes me raise an eyebrow of doubt to their claim, however, it's most certainly believeable if you did several of these mods- oil, CAI, pulleys, etc., you would definitely see a 4-5 (or more) mpg increase.