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Old 05-16-2012, 03:37 PM   #1
intensifi

 
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Question What mods will increase the mileage on LFX

I ordered a 2013 2LT Convertible and am wondering what mods to do first.

Blacking out the tail light bezels, short throw shifter, upgraded center console and upgraded ebrake handle are at the top of the list.

What should I do next?

The car will mostly be a daily driver.
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Old 05-16-2012, 03:56 PM   #2
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remove side mirrors, lower car, skinnier tires, block out grille, higher tire psi, remove cats, setting the tune to always be in mileage mode....

about all i can think of at the moment
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Old 05-16-2012, 04:13 PM   #3
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The most important mod for mileage is the driver mod. CAI should, in theory, increase your mileage.
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Old 05-16-2012, 09:00 PM   #4
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Quote:
Originally Posted by xx_ED_xx View Post
remove side mirrors, lower car, skinnier tires, block out grille, higher tire psi, remove cats, setting the tune to always be in mileage mode....

about all i can think of at the moment
These are not very practical mods. And what the heck is "setting the tune to always be in mileage mode?"

Removing the cats most likely won't increase mileage and is both illegal and warranty-voiding.

Removing mirrors would make the car undriveable.

Blocking out the grill might make the car run way hot.

Here are some of mine: add a vacuum gauge and drive conservatively to try to keep vacuum high. Get out of lower gears as soon as possible without revving excessively or bogging the engine. Plan ahead to keep speed as constant as possible. Avoid fast starts or the need to brake hard (that means you didn't plan ahead).

All my opinion, of course.

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Old 05-16-2012, 09:49 PM   #5
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Really? add a vacuum gauge? Where is the gage mounted inside the car?
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Old 05-17-2012, 07:40 AM   #6
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Lmao wow the replies in here are great thus far...

As stated above by rykeith - the "driver" mod is the most important. Keep RPMs low and if it's a manual shift sooner than letting the RPMs get real high. If it's an automatic, find a local tuner who would tune it for MPGs instead of HP. There's ways to tune a car to be more fuel efficient - my '94 Camaro with a 357ci LT1, cammed and stalled drives with the same MPGs as the 3.4L v6 that used to be in it.

A cold air intake should help bump the MPGs one or two higher.
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Old 05-17-2012, 03:08 PM   #7
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Really? add a vacuum gauge? Where is the gage mounted inside the car?
It is in the realm of possibilities. It's a pretty simple addition; find a vacuum source, add a tee and some hose and run it into the car. Mount the gauge wherever you want to. My brother's '65 Chevy Impala had one stock for this exact purpose.

How much gas does a tune buy you? Let's say 100 gallons. That's a lot of driving.

You can overinflate the tires, but I wouldn't go past the max on the sidewall.

Revs mean fuel. And the driver mod IS key. Just don't get all crazy thinking you're going to win any gas mileage contests against some hard core hypermilers; they seem to love to torture themselves...and fellow motorists.

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Old 05-17-2012, 03:28 PM   #8
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CAI, RX catch can, stay at lower rpm, exhaust
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Old 05-17-2012, 04:24 PM   #9
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CAI, losing weight (either the car or you lol) easiest is to get an exhaust, don't drive it like you stole it. Keep tires at a decent pressure. But in all seriousness who bought a camaro for its gas mileage.
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Old 05-17-2012, 05:47 PM   #10
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Thanks.

Losing weight is a great idea!

So is proper tire inflation and keeping the RPMs lower when driving. Those all make perfect sense.

How do/does cold air induction, exhaust upgrades and catch cans function such that they improve mileage? I'm interested in a technical description.

As to why I'm interested in this, when doing my daily driving I'd rather save $$$ so I can do more fun driving and buy other fun stuff for me and my family. I live in California and our gas prices are pretty high.
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Old 05-17-2012, 06:38 PM   #11
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The exhaust will be lighter therefor losing weight which means not as much gas is needed to move it as before. Idk if catch cans actually help. I think cai work by bringing more air into the engine to which then requires less gas to ignite? I think?
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Old 05-17-2012, 06:57 PM   #12
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The oil ingestion causes detonation and the ECU pulls timing, so a good functioning catchcan will usually result in 1-3 mpg improvement on the average car/light truck. CAI allows less restrictive air flow so that can help as well.

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Old 05-18-2012, 04:47 PM   #13
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Quote:
Originally Posted by JohnnyBfromPeoria View Post
These are not very practical mods. And what the heck is "setting the tune to always be in mileage mode?
A compotent tuner can do it....

Removing the cats most likely won't increase mileage and is both illegal and warranty-voiding.
I dont live in a state with sniffer inspection and how is it warranty voiding??

Removing mirrors would make the car undriveable. How would removing the mirrors make it underdrivable? If you do some research you will see side mirrors effect mileage on any car and how they have experimented with removing them. Some people dont rely on their mirrors to drive.....

Blocking out the grill might make the car run way hot.
Again an aero mod and how do you know if you dont try it. That isnt the only way air gets into the engine you also have that big gapping hole below the grille. You have seen a corvette right??

Here are some of mine: add a vacuum gauge and drive conservatively to try to keep vacuum high. Get out of lower gears as soon as possible without revving excessively or bogging the engine. Plan ahead to keep speed as constant as possible. Avoid fast starts or the need to brake hard (that means you didn't plan ahead).
You can set the mpg gauge to be instant which is just like using a vacuum gauge. Which is the map sensors job anyhow

All my opinion, of course.

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Old 05-18-2012, 08:13 PM   #14
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Or you could buy a Prius, I suppose (ha ha).

There may one day be a tuner tuning for economy on the V-6, but I don't know of one now. I suppose you could ask for it. Hot Rod Harry down at the corner garage can't do it.

You'd light up your check engine light without the cats in place, I'm pretty sure. And it's "against Federal law to tamper with the emissions control devices," as if someone is actually going to be able to track you down and take you to trial.

I'm fully aware that side view mirrors present drag. Tell you what, you can try driving this particular car without them and tell me if it's worth it. Might be easier in a car with windows bigger than a tank.

Corvettes are designed to have the front end they do and the cooling system is built to fit it. The Camaro isn't. Once you get behind the front air dam, it's low pressure under the car, so air would be drawn out of the engine bay and it has to get in there somehow. Not saying it wouldn't, but that's not how it's presently designed to work. Not trying that one in Phoenix this time of year.

The vac gauge is a bit primitive, but it is instantaneous, rather than an averaging system.

How about fabricating flexible side skirts and putting on a lower front air dam/splitter? Keeping the air from going under the car nets a touch better in the coefficient of drag department and the flexible ones can handle speed bumps and curbs better than rigid pieces.

You were right about skinnier tires, too. It's pretty apparent on my off road vehicles (that are highway driven to the trails) that the wider the tire, the more wind resistance they pose, as well as having a higher rolling resistance.

If you're really looking to live life on the edge, try drafting semi trailers.


John B.
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