Vehicle speeds accelaration, RPM and Gears (no speed limit)

So if you want to edit a vehicles handling so it is beast you need to know where its handling.meta is but once you find it there is loads of data which noobs dont understand

I am no expert in all of this but just wanted clarity

gears: the larger the number, the more power in the engine so uphill is easier?

the upshift and downshift gears number: does a smaller number (shift quicker) mean more accelaration or by using hi RPM  from a larger shift number does it go faster?

Initialforce: I dont know for sure but i think this number affects the accelaration?

dragcoificient: now i know this affects the accelaration at higher speeds (you accelarate slower at higher sppeds and this being lower mean you dont get so much air resistance)?

maxflatvel: this is in km/h the speed of the vehicle usually at like 160 which sets teh mph speed  at or the mph at 100 or so so increasing this makes the car be faster?

All I know is from experimentation this makes a fast car

<Item type="CHandlingData">
      <handlingName>ADDER</handlingName>
      <fMass value="1800.000000" />
      <fInitialDragCoeff value="0.7800000" />
      <fPercentSubmerged value="85.00000" />
      <vecCentreOfMassOffset x="0.000000" y="0.000000" z="0.000000" />
      <vecInertiaMultiplier x="1.000000" y="1.300000" z="1.500000" />
      <fDriveBiasFront value="0.200000" />
      <nInitialDriveGears value="8" />
      <fInitialDriveForce value="0.320000" />
      <fDriveInertia value="1.000000" />
      <fClutchChangeRateScaleUpShift value="3.000000" />
      <fClutchChangeRateScaleDownShift value="3.000000" />
      <fInitialDriveMaxFlatVel value="426.000000" />
      <fBrakeForce value="1.000000" />
      <fBrakeBiasFront value="0.450000" />
      <fHandBrakeForce value="0.700000" />
      <fSteeringLock value="42.000000" />
      <fTractionCurveMax value="2.500000" />
      <fTractionCurveMin value="2.380000" />
      <fTractionCurveLateral value="22.500000" />
      <fTractionSpringDeltaMax value="0.150000" />
      <fLowSpeedTractionLossMult value="1.500000" />
      <fCamberStiffnesss value="0.000000" />
      <fTractionBiasFront value="0.485000" />
      <fTractionLossMult value="1.000000" />
      <fSuspensionForce value="2.400000" />
      <fSuspensionCompDamp value="1.400000" />
      <fSuspensionReboundDamp value="2.100000" />
      <fSuspensionUpperLimit value="0.120000" />
      <fSuspensionLowerLimit value="-0.100000" />
      <fSuspensionRaise value="0.000000" />
      <fSuspensionBiasFront value="0.500000" />
      <fAntiRollBarForce value="0.900000" />
      <fAntiRollBarBiasFront value="0.600000" />
      <fRollCentreHeightFront value="0.410000" />
      <fRollCentreHeightRear value="0.410000" />
      <fCollisionDamageMult value="0.700000" />
      <fWeaponDamageMult value="1.000000" />
      <fDeformationDamageMult value="0.700000" />
      <fEngineDamageMult value="1.500000" />
      <fPetrolTankVolume value="65.000000" />
      <fOilVolume value="5.000000" />
      <fSeatOffsetDistX value="0.000000" />
      <fSeatOffsetDistY value="0.000000" />
      <fSeatOffsetDistZ value="0.000000" />
      <nMonetaryValue value="80000" />
      <strModelFlags>440010</strModelFlags>
      <strHandlingFlags>0</strHandlingFlags>
      <strDamageFlags>0</strDamageFlags>
      <AIHandling>AVERAGE</AIHandling>
      <SubHandlingData>
        <Item type="CCarHandlingData">
          <fBackEndPopUpCarImpulseMult value="0.075000" />
          <fBackEndPopUpBuildingImpulseMult value="0.030000" />
          <fBackEndPopUpMaxDeltaSpeed value="0.250000" />
        </Item>
        <Item type="NULL" />
        <Item type="NULL" />
      </SubHandlingData>
    </Item>