Performance Chip = better gas mileage?

[repenttokyo]

Which is the better chip for power?

from what i understand, it's identical.

[AngryPopTart]

I've had my EAT chip for years now. When I first got it my mileage improved by about 1-2 mpg city. Just make sure you don't offset the mpg gain by sticking your foot in it more often because you will 'feel' an increase in performance (although our wagons are still dogs....). And it does seem to need premium grade, knocks pretty bad when I've tried regular. But you say your only getting 17mpg now? Sounds like you might have other problems. I get 23 city, 28-30 highway. You have the stock M50tu?

Any improvement would be great in my opinion. I have an '89 525i and I am only getting about 17mpg right now, even though I'm trying to baby it or take the freeway more. I probably need to replace the sensors in my car.* I'm not getting any knocking even at WOT on regular and it's been about 104-107 degrees the last couple days... but then I have 8.8:1! What do you have?

*I've disconnected the sensor that runs into the exhaust in the past and I don't think it changed the way the car ran nor the mileage. But that may have been before I had to replace the engine so I'll try disconnecting it and see if my mileage changes. If not, does it sound like a bad sensor?

[ThoreauHD]

They have instructions with pictures with the Turner chip. It's the least they can do for charging 200 for a eprom. The hardest part of installing the chip is jerking the living **** outta the metal clamps on your ECU. Get a big pair of pliers and just pull like hell. It scared the heck outta me the first time. I thought I broke something. But it's normal.

As far as whether conforti or d'sylva is better, I don't know. I can't compare them, but from what the EATS guys have said, I get the same results. I put a dinan transmission chip in also, but that didn't help with much of nothin as far as I can tell. Maybe higher revs in lower gears.

Keep in mind that after you put in the chip, and put in 91 or better octane, that you'll have to train it a bit. Drive it around a little so it will get used to your driving style. After that, it'll be smooth. Immediately though, you will notice an increase in power and later, an increase in mpg. Let us know if you have any questions. It's just like putting an eprom on your computer gadgets at home.

[ThoreauHD]

Any improvement would be great in my opinion. I have an '89 525i and I am only getting about 17mpg right now, even though I'm trying to baby it or take the freeway more. I probably need to replace the sensors in my car.* I'm not getting any knocking even at WOT on regular and it's been about 104-107 degrees the last couple days... but then I have 8.8:1! What do you have?

*I've disconnected the sensor that runs into the exhaust in the past and I don't think it changed the way the car ran nor the mileage. But that may have been before I had to replace the engine so I'll try disconnecting it and see if my mileage changes. If not, does it sound like a bad sensor?

I'm not sure what sensor you are talking about, but if that was the O2 sensor, then removing a bad one wouldn't change anything. Putting in a working one would be night and day though for gas mileage. You really really need your O2 sensor on these cars. I have 2, and when they get pissed I lose 7 mpg easy, and bust out a ton of crap exhaust.

[AngryPopTart]

I'm not sure what sensor you are talking about, but if that was the O2 sensor, then removing a bad one wouldn't change anything. Putting in a working one would be night and day though for gas mileage. You really really need your O2 sensor on these cars. I have 2, and when they get pissed I lose 7 mpg easy, and bust out a ton of crap exhaust.

The one that plugs in where the exhaust pipes meet after the manifolds. I still passed my smog test with ease, though. I wonder if I have a bad temperature sensor... my gauge always reads close to the red, which I'm aware is not correct. If the sensors in these babies weren't so expensive!!! Grrr!

[Ross]

ROGER Ramjet, thanks for the blast from the past
http://www.youtube.com/watch?v=rovdLR94-L8

[AngryPopTart]

The one that plugs in where the exhaust pipes meet after the manifolds.

I disconnected this sensor today and there is no change; still 17mpg! Think it's bad?