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1998 s4 remap or chip

Discussion in 'A4/S4 forum(B5 Chassis)' started by curtis11, Aug 12, 2007.

  1. curtis11
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    curtis11 Member

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    [Aug 12, 2007]
    hi , can a 98 model s4 be remaped or does it have to be chiped?
    thanks
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  3. shineydave
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    shineydave Member

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    [Aug 12, 2007]
    not sure for definate but i thought all S4's could be mapped.
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  4. curtis11
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    curtis11 Member

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    [Aug 12, 2007]
    i thought if a vag car had fly by wire throttle it could be remapped, if a cable throttle it would be a ecu chip job
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  5. Markey
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    Markey Active Member

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    [Aug 12, 2007]
    It would be mapped some palces use chips instead of remapping the original ECU so im lead to believe.
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  6. Blue_Thunder
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    Blue_Thunder Active Member

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    [Aug 12, 2007]
    Yes, they can remap 98 S4's. Mine's been done twice now.
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  7. curtis11
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    curtis11 Member

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    [Aug 12, 2007]
    how do you find it compared to standard delivery?
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  8. GSB1
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    GSB1 Member

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    [Aug 12, 2007]
    Pretty much the same in terms of nature/behaviour/smoothness just it's more powerful, gives you more of a push in the back and is quite obviously quicker!

    After mine was mapped I percieved that I had lost some lower end torque. This was quite simply not true. What had actually happened was I had a higher new peak torque value higher up the revs. However the torque with the remap at the revs where the stock peak torque was still higher, hence no loss, in fact a gain throughout, just a new peak.

    Ultimatley the qualities of the stock car are not lost at all in my opinion, just vastly improved.

    Mine is a '98 S4 with an MRC Tuning custom remap.
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  9. curtis11
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    curtis11 Member

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    [Aug 12, 2007]
    so what rpm does your big dump of torque come in ?
    around 3k?
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  10. GSB1
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    [Aug 12, 2007]
    Torque still nice and low as per characteristic of the stock car.

    Here is a dyno plot showing BHP (at the wheels) and Torque after the remap.

    You can see absolute peak torque is about 4200rpm but it's pretty much the same with with only a slight increase from the where the spike at 3200rpm tails off.

    Figures are at the wheels, but 250BHP @ 5100rpm (about 320BHP) and peak torque 360lb.ft at 4200rpm, but above 300 ft.lb at 3600rpm.

    Compare this with the stock figures which I believe are 265BHP@5800rpm and Max Torque 296lb.ft/400Nm@1850-3600rpm

    [​IMG]
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  11. dappadan786
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    dappadan786 Member

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    [Aug 13, 2007]
    hi mate, the old chip is removed and read, then a new chip is programmed and soldered back on.

    my mates 1999 S4 was chipped and thats how the chap did it.
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  12. Blue_Thunder
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    Blue_Thunder Active Member

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    [Aug 13, 2007]
    There's no soldering involved if you go to MRC. They can remap the ECU whilst you are driving once they have 'unlocked' it with some laptop wizardry. Much safer in my opinion. Wouldn't fancy having my car's brain being tampered with like that!
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  13. curtis11
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    curtis11 Member

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    [Aug 13, 2007]
    yea i hear that
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  14. dappadan786
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    dappadan786 Member

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    [Aug 14, 2007]
    if the person knows exactly what they are doing there should no need for concern. my audi A4 was done this way. 1996, 1.8T. no problems at all.
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