fuel saver equipment

[sanlen]

Hi All,

I have been seaching around via google (http://www.google.com.kh/search?um=1...-8&sa=N&tab=iw), and found an equipment called "fuel saver" that can be used to reduce the fuel consumption of a car.

I wonder if those equipments is worth to get one? Could you please advice what are the disadvantage of this?

Thank you very much for your time.

sanlen

[BMR]

It's a scam.

If improving gas mileage were that simple & inexpensive, all the auto makers would install that sort or thing to improve their CAFE (Corporate Average Fuel Economy), instead of spending billions designing hybrids and improving gasoline engine efficiency.

[iovaykind]

^^Why can't people just use the search button. It's been covered a million times, and everyone and their mom knows that saving fuel or gaining power is not cheap.

[Mister_Perkins]

Originally Posted by sanlen

Hi All,

I have been seaching around via google (http://www.google.com.kh/search?um=1...-8&sa=N&tab=iw), and found an equipment called "fuel saver" that can be used to reduce the fuel consumption of a car.

I wonder if those equipments is worth to get one? Could you please advice what are the disadvantage of this?

Thank you very much for your time.

sanlen

One thing you could try that might help save fuel is a map enhancer. The following picture is one that I made myself.

Originally Posted by N/A Camry Sleeper

Regarding your MAP enhancer - you will likely get a CEL at times when trying to find the optimum adjustment for highway use. I always got the "mixture too lean" code when I first started (sometimes I still get it). I know this throws the car into a closed loop (or is it open, I forget) which dumps more gas into the cylinders, but either way; closed or open, you will see an improvement in fuel economy I'm sure.

ANother thing that happened to me when I first started - you EGT will be VERY high the leaner you go. My stock exhaust manifold changed colors from brownish to brown-blue to almost a grayish blue after a long trip! I decided to inspect the upstream o2 sensor one day and found that it was partially melted!!! So I went online and found an o2 sensor extender which takes the sensor partially out of the path of the exhaust but still allows its function. When I changed to a stainless steel header they turned different colors as well but of course they don't rust

Just thought I'd give you a heads up on what to expect - I still use the MAP enhancer and I have not had a single problem with raised EGT since I started using it more than 2 years ago. It's a great mod which will pay for itself many times over, giving you more control over your mixture.

The next step after that is to get a wideband o2 sensor, but I'm waiting for the engine swap before I do this...good luck!

[N/A Camry Sleeper]

^I second that one...

The MAP enhancer is easy to build (or you can buy one if you are so inclined) and easy to install. This is only my opinion - and driving habits vary - but you may see up to 3-4MPG increase in hiway and possibly 2-3 MPG increase in city once you and the computer get used to the MAP enhancer settings.

Admittedly, I drive rather fast - but the gains are there to be had even if you have a lead foot. I have had an enhancer for more than 2 years now, and love it

Just a ballpark, but before the MAP enhancer installation I was getting 22/31 (27 combined MPG)
Currently (with 306K on the odometer mind you) I get 25/33 (combined 28 MPG) driving 25K miles per year, mostly interstate trips

My city mileage may be a tad better since my Camry has close to a 300 lb weight reduction in addition to a header, full 2.5" exhaust, and some other N/A mods

I recently took a 300-mile interstate trip without the MAP enhancer hooked up and I got 28 MPG. If it's easier to draw air into the engine the computer will add more fuel to get close to the right A/F mixture, which kills your economy. But properly tuned you CAN and WILL see benefits which will cover the cost of the enhancer

[reluctantmechanic]

those were big a few years back when we had 4.00/gal gas...lots of news stations tested them and came up with SCAM...I'm sure people selling them made millions.

[N/A Camry Sleeper]

Originally Posted by Mister_Perkins

One thing you could try that might help save fuel is a map enhancer. The following picture is one that I made myself.

By the way - have you hooked yours up yet? Been curious to see how it works for you...

[Mister_Perkins]

Originally Posted by N/A Camry Sleeper

By the way - have you hooked yours up yet? Been curious to see how it works for you...

no i haven't hooked it up yet, I need to get the o2 extenders before I install it so I don't melt the sensors. ehe

Originally Posted by reluctantmechanic

those were big a few years back when we had 4.00/gal gas...lots of news stations tested them and came up with SCAM...I'm sure people selling them made millions.

They make sense though, because Effectively they are controlling the MAP Sensor voltage with a Potentiometer and resistors. If you can control the voltage, then you can control how much fuel the ECM is feeding to the car