Mods that increase fuel efficiency
#121
CAI = MPG loss..by bringing in colder denser air the car will add more FUEL to compensate thus generating more power and lowering your mpgs...thast why Hot air intakes are popular..run piping from under ur exhaust mainfolds into your intake alows hotter temps(~120) of air into ur engine, the car will sense this and spray less fuel, higher temps also increase atomization of the fuel, therefore you burn less better ^^
#123
WELCOME TO THE FORUMS at any rate, and read up you'll get addicted just like the rest of us!!!!
#124
and thanks, i appreciate it.
#127
Alternatively, I have a friend who swears that short ram intakes improve mileage by 1 or 2 MPG. Says this has happened for him on two different cars.
#128
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CAI = MPG loss..by bringing in colder denser air the car will add more FUEL to compensate thus generating more power and lowering your mpgs...thast why Hot air intakes are popular..run piping from under ur exhaust mainfolds into your intake alows hotter temps(~120) of air into ur engine, the car will sense this and spray less fuel, higher temps also increase atomization of the fuel, therefore you burn less better ^^
I will post up an honest report after Memorial when I get time to install mine.
#129
And not to be ignored is the reduction in pumping losses an intake grants compared to a convoluted stock resonator system.
In my experience in comparing stock w/ aftermarket intakes, mpg is a wash. Although I have yet to install one on the L15, or do any datalogging of intake temps on this car.
#130
Try reading some GRASSROOTS MOTORSPORTS hop-ups; they, as we, have seen losses in both power and mpg after adding AI's. Since CAI's cost around $200 long would it take to pay for a 2 mpg improvement?
#131
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Cuz with a loss in MPG you wouldn't be able to get a $200 payback with a 2 mpg gain.
#132
At $3/gallon, 45,600 miles.
At $4/gallon, 34,200 miles.
I'll almost certainly beat all of those mileages before I sell this car, so it's worth it to me just in fuel savings. If there is a genuine power improvement, all the better.
Although I will not, not, NOT put a washable air filter on my car -- sheesh, I don't even treat my lawn tractor that badly.
#134
At $2/gallon, 68,400 miles.
At $3/gallon, 45,600 miles.
At $4/gallon, 34,200 miles.
I'll almost certainly beat all of those mileages before I sell this car, so it's worth it to me just in fuel savings. If there is a genuine power improvement, all the better.
Although I will not, not, NOT put a washable air filter on my car -- sheesh, I don't even treat my lawn tractor that badly.
At $3/gallon, 45,600 miles.
At $4/gallon, 34,200 miles.
I'll almost certainly beat all of those mileages before I sell this car, so it's worth it to me just in fuel savings. If there is a genuine power improvement, all the better.
Although I will not, not, NOT put a washable air filter on my car -- sheesh, I don't even treat my lawn tractor that badly.
At $2 per gal, burning 31.25 gal per 1000 miles at 32 mpg versus 33.3 gallons at 30 mpg means saving 2.08 gallons per 1000 miles, or $4.16 per 1000 miles. or 48,000 miles to recover $200.
At $4 per gallon it takes only half as long - 24000 miles.
Still too long a payback for me, especially since the 2 mpg is not assured.
And I agree with not using 'wetted' filters; they have not proven successful for us in race cars, much less street, because of the contamination of the wire sensor coating problems.
#135
I actually would use two different oiled air filters (on any vehicle whose intake manifold gizmos do not get fouled by the oil itself): an oil-impregnated foam filter on the outside of a paper filter, to catch the really big gunk -- you might see this on a lawn mower or similar; and an oil bath air filter such as used on antique vehicles, some diesel trucks, and even the odd 60's VW Beetle. They do a great job of filtering air but ewww what a mess to service.
#137
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you hear and read all this stuff, but I have used oiled CAI's for years and as long as about 80K miles on a single vehicle, so I know a truth witnessed with my own eyes and experience. And a lot of times I have found things work better than the naysayers indicated.
Oiled filters filter pretty good and actually better when they get a little dirty. No issues with MAF sensors for me and many others I know, but it is best not to over oil after cleaning.
I figure it is my money, I'll spend it the way I wish. Knocking it means not all that much, results I find on my own mean everything and I will post my honest results. Things I feel dont work that well, I take off and sell and I dont believe I have lost more than about 20-25%
Now that I see my forged wheels and lightweight pulleys have netted a good 4% + increase in MPG and a noticeable power increase, I am ready for an intake Next, Beatrush needs to get off their arse and make a GE under panel.
It is a nice thread about +MPG mods, half the fun is trying things on your own
The real payback is maybe less money goes to radical fundamentalists that would like to see us dead.
Oiled filters filter pretty good and actually better when they get a little dirty. No issues with MAF sensors for me and many others I know, but it is best not to over oil after cleaning.
I figure it is my money, I'll spend it the way I wish. Knocking it means not all that much, results I find on my own mean everything and I will post my honest results. Things I feel dont work that well, I take off and sell and I dont believe I have lost more than about 20-25%
Now that I see my forged wheels and lightweight pulleys have netted a good 4% + increase in MPG and a noticeable power increase, I am ready for an intake Next, Beatrush needs to get off their arse and make a GE under panel.
It is a nice thread about +MPG mods, half the fun is trying things on your own
The real payback is maybe less money goes to radical fundamentalists that would like to see us dead.
#139
And can anyone explain to me why a 16" tire weighs more than a 15" tire, outside diameters being equal? It boggles the mind...
The real payback is maybe less money goes to radical fundamentalists that would like to see us dead.
#140
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Tire weights
On Tire Rack the 09 16" Dunlops weigh 18 lbs, the stock GD 15" Dunlop sport tires I believe weigh 21 lbs as I remember (but 09's are a bit narrower) I know what you mean though. But from my recollection tires of the same size can vary around 3 lbs from one manufacturer to another. Want to try the Michelin Energy Saver's released here soon. Toyota found a 3%+ MPG gain and is putting them on the 2010 Yaris (and maybe the Prius as well)
That's a biggie, for sure. Along that line, there are refiners who use import no crude from the Persian Gulf whatsoever, such as Sunoco. If your goal is to keep money out of the hands of Islamic extremists, you may want to research which suppliers in your area do not use Persian Gulf oil. (Of course this may mean sending money to radicals in Russia or Venezuela. Nothing's ever as simple as it seems, sigh.)