Export the XML file of all teams , open it and right at the beginning of the file, there is a RevsPowerSpline part with SplineElement rows in it. If you increase the 'y' values, the engine of that team will be stronger. For reference, an upgrade via R&D mode adds (not replaces!) these 'y' numbers to those lines:
Code:
<RevsPowerSpline numVertices="12">
<SplineElement x="0" y="0" op="+" />
<SplineElement x="0" y="0" op="+" />
<SplineElement x="0" y="15348" op="+" />
<SplineElement x="0" y="29642" op="+" />
<SplineElement x="0" y="47272" op="+" />
<SplineElement x="0" y="58449" op="+" />
<SplineElement x="0" y="58504" op="+" />
<SplineElement x="0" y="70631" op="+" />
<SplineElement x="0" y="71586" op="+" />
<SplineElement x="0" y="70770" op="+" />
<SplineElement x="0" y="69338" op="+" />
<SplineElement x="0" y="58950" op="+" />
</RevsPowerSpline>
A little further down, at about line 273, there something similar called RevsEngineBrakingSpline.
Here are the increases to the values (y) for an R&D upgrade for your engine:
Code:
<RevsEngineBrakingSpline numVertices="8">
<SplineElement x="0" y="2" op="+" />
<SplineElement x="0" y="3" op="+" />
<SplineElement x="0" y="6" op="+" />
<SplineElement x="0" y="8" op="+" />
<SplineElement x="0" y="10" op="+" />
<SplineElement x="0" y="13" op="+" />
<SplineElement x="0" y="14" op="+" />
<SplineElement x="0" y="14" op="+" />
</RevsEngineBrakingSpline>
Just to be clear, don't change the numVertices. Add the y values to the current values of RevsPowerSpline and RevsEngineBrakingSpline to get an equivalent to an R&D upgrade.