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Will removing EGR lower mpg??

This is a discussion on Will removing EGR lower mpg?? within the External Engine forums, part of the LSx Technical Help Section category; I want to remove AIR and EGR this summer and I can also get the codes tuned out. Clearly this ...

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    Rice Hungry GottaHaveLS1's Avatar
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    Will removing EGR lower mpg??

    I want to remove AIR and EGR this summer and I can also get the codes tuned out. Clearly this is just an appearance mod (and minimal weight loss), but will my gas mileage change? I'm already getting 4.10 gears and i don't want to think what the cost of premium will be this summer. any thoughts?

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    Member hoss 2000 z-28's Avatar
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    I didn't notice any difference in mileage once I deleted EGR on my car. For me it was a choice to stop pumping hot air back into the motor. Never was a fan of that. For what it's worth, 4.10's are much more of a factor than EGR could ever be. If fuel economy is a concern you should send the 4.10's back for at least 3.73's.

    This thread is not NWS!

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    Rice Hungry GottaHaveLS1's Avatar
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    Quote Originally Posted by hoss 2000 z-28 View Post
    I didn't notice any difference in mileage once I deleted EGR on my car. For me it was a choice to stop pumping hot air back into the motor. Never was a fan of that. For what it's worth, 4.10's are much more of a factor than EGR could ever be. If fuel economy is a concern you should send the 4.10's back for at least 3.73's.

    This thread is not NWS!
    I'm not that concerned with mpg, cuz its not a DD anymore. I was just asking cuz on ls1tech, i read that putting exhaust gas back into the motor makes the motor "think" it's smaller and it gets better mpg. i'm not too sure tho, i'll have to read the thread again.

    I don't know NWS is and i didn't mean to select it.

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    Senior Member splitfinger09's Avatar
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    Rice Hungry GottaHaveLS1's Avatar
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    Member Pntbll309's Avatar
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    Quote Originally Posted by GottaHaveLS1 View Post
    I'm not that concerned with mpg, cuz its not a DD anymore. I was just asking cuz on ls1tech, i read that putting exhaust gas back into the motor makes the motor "think" it's smaller and it gets better mpg. i'm not too sure tho, i'll have to read the thread again.

    I don't know NWS is and i didn't mean to select it.
    If your not concerned about MPG then why ask? I removed my EGR and still pulled 29 highway MPG.

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    Junior Member extanker's Avatar
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    i may start to ping [knock]

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    Rice Hungry GottaHaveLS1's Avatar
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    I'm asking just so I know. lol, wouldn't you be concerned if ur mpg just dropped after removing something stupid like that?

    How many people have experienced pinging? I don't understand why that would happen seeing as 01-02 cars dont have it.

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    Member kev70ss's Avatar
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    01-02 have a smaller cam so, they dont need EGR. Vettes also dont have it because there cam is different.

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    Rice Hungry GottaHaveLS1's Avatar
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    Member kev70ss's Avatar
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    I removed my EGR and I havent noticed a change in MPG and my car doesnt ping

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    Rice Hungry GottaHaveLS1's Avatar
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    good to hear. Does anyone know how much AIR and EGR weigh? I'm positive I won't notice a difference in acceleration, but i'm just curious.

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    TunedbyFrost.com Tuner Frost's Avatar
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    Quote Originally Posted by extanker View Post
    it may start to ping [knock]

    the 98-00 calibrations have a spark adder that adds spark to the map in the area where EGR is operational and if it's being called for. A standard part of [pcm] removal is wiping out that table; at least it is for me.

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    Rice Hungry GottaHaveLS1's Avatar
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    ^^i see. hopefully my tune should take care of that.

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    Quote Originally Posted by Frost View Post
    the 98-00 calibrations have a spark adder that adds spark to the map in the area where EGR is operational and if it's being called for. A standard part of [pcm] removal is wiping out that table; at least it is for me.
    arn't there some programmers that will do all this with out you talking anything off just shut down the egr and recalibrate for it. Sorry still new not really sure how or what the egr does.

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    TunedbyFrost.com Tuner Frost's Avatar
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    In my mind, if EGR is disabled, that spark adder *shouldn't* be called, but I wipe the table just in case. The other adders are all full time, so this one may be as well; I have never logged to see, I just wipe it out so that it isn't an issue.

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    It's stock, i swear! THEBRAD's Avatar
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    28 mpg with no egr just a k&n filter long tube pacesetters and a y pipe no exhaust after that. it was better than that but we added some fuel to my tune to get it a little closer to stock probably dropped about 1mpg max 2

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    Member Speed_kills_WS6's Avatar
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    Geez...I get about 17 mpg around town in my '02 M6. That's with the stock rearend. Highway miles are usually around 25. Wish I knew what to do. Changed O2 sensors, filters, etc. All to no avail...

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    Member kev70ss's Avatar
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    Quote Originally Posted by Speed_kills_WS6 View Post
    Geez...I get about 17 mpg around town in my '02 M6. That's with the stock rearend. Highway miles are usually around 25. Wish I knew what to do. Changed O2 sensors, filters, etc. All to no avail...
    Thats not to bad for mileage, when i got my tine for my car i picked up about 2mpg. You might want to look at a tune

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