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Thread: EGR Delete on remap..... benifits?

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    Default EGR Delete on remap..... benifits?

    Hi all im looking at getting my cdti remapped and the chap at MAS has said he can delete the egr?

    what does it do and are there any benifits to having it done?

    my egr valve is 2 weeks old so its working fine.

    cheers

    steve

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    Regular Member winnie2457's Avatar
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    It's up to you I have mine removed from my map done by Mas

    Te benefits are no more problems at all with the egr system an increase in mpg very slightly and endive getting lots of fresh air rather than dirty exhaust gasses

    The main reason which is why j have done it is to save my inlet manifold from failing as the egr mixed with oil causes sludge which clogs upbte manifold and breaks the swirl bar which means a new inlet manifold

    When you see ben at Mas tell him steven Winship from kings Lynn says hello

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    Full Member GazVXLINE170's Avatar
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    Benefits are better response from 1,200rpm onwards and you will also rule out the flat spot caused by the EGR valve. Downside is it ups the exhaust gas temperature.

    As someone says it's upto you. I have a blanking plate for mine which I am yet to fit.

    Gazza4
    Insignia VX-Line Nav CDTI 170.

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    Gazza,
    Is that a semi blanking (fiat) gasket or other

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    Full Member GazVXLINE170's Avatar
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    Quote Originally Posted by dh.dti View Post
    Gazza,
    Is that a semi blanking (fiat) gasket or other
    This one:

    http://cgi.ebay.co.uk/EGR-blanking-b...82826461563034

    Gazza4
    Insignia VX-Line Nav CDTI 170.

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    Regular Member felixx's Avatar
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    Thumbs down

    Quote Originally Posted by Gazza4 View Post
    That's the one I fitted,although I put a 9mm hole in it to keep the EML off.(Tried 8mm but the light kept coming on intermittently). FELIXX.

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    Full Member GazVXLINE170's Avatar
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    Quote Originally Posted by felixx View Post
    That's the one I fitted,although I put a 9mm hole in it to keep the EML off.(Tried 8mm but the light kept coming on intermittently). FELIXX.
    I'll not be drilling any hole.

    Gazza4
    Insignia VX-Line Nav CDTI 170.

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    Regular Member lee gsi's Avatar
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    You will not get an increase in mpg. If anything you will get a slight reduction.

    This is what its used for:

    The purpose of EGR (Exhaust Gas Recirculation) is to reduce the NOx emissions. Air is mainly made of oxygen and nitrogen (O2 and N2). At temperatures above 1300°C (2372°F), these molecules split apart and rejoin with each other to make nitrogen oxides (like NO, NO2, etc...). The nitrogen oxides contribute to smog formation.

    EGR puts a portion of the exhaust gas back into the intake manifold, so it mixes with the fuel and air. (Note that the exhaust adds to the fuel and air; it doesn’t replace any of it). The added mass in the cylinder is harder to heat up, so the combustion events have lower peak temperatures. The lower temperatures prevent the O2 and N2 from splitting and combining. Even though the exhaust is hot, about 600°C (or 1112°F), it's much cooler than the 1300°C required to make NOx.

    In summary, the exhaust adds mass, increasing the heat capacitance of the mixture (i.e. making it harder to heat up the mixture in the cylinder). Peak temperatures are lower, reducing NOx formation, which ultimately reduces smog in the environment.

    The reason EGR improves fuel economy is because it reduces the engine's pumping losses. For the cylinder to move down on the intake stroke, the piston is working against the intake manifold vacuum. Another way to say it is that the vacuum above the piston tries to prevent the piston from going down. EGR increases the mass in the intake; more mass means higher pressure, or less vacuum. Now the piston has less resistance during each intake stroke, which results in better gas mileage.

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    Regular Member Mopar Man's Avatar
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    Beet me to it Lee. EGR is there for MPG.
    The oil fumes from the crank case pressure gunge up the intake, before it gets burnt,
    Its the linkage that wears out on the 1.9 150s. BMW and Mercs suffer from jammed swirls.

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    Full Member GazVXLINE170's Avatar
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    Quote Originally Posted by lee gsi View Post
    You will not get an increase in mpg. If anything you will get a slight reduction.

    This is what its used for:
    But those are also summed up as 'throttling losses' which don't really affect diesels as much as they are not throttled like petrols.

    Quote Originally Posted by Mopar Man View Post
    Beet me to it Lee. EGR is there for MPG.
    The oil fumes from the crank case pressure gunge up the intake, before it gets burnt,
    Its the linkage that wears out on the 1.9 150s. BMW and Mercs suffer from jammed swirls.
    How come when they jam open, mpg suffers? mines is.

    Gazza4
    Insignia VX-Line Nav CDTI 170.

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