SF15-T Guidelines

1 Tyres

1.1 Ideal running pressures: 28 psi, all tyres/compounds.

1.2 Ideal running temperatures – within 10 degrees of:

  • 100 – Supersofts
  • 105 – Softs
  • 110 – Mediums
  • 115 – Hards


ACRL DRS App (3014 downloads) The ACRL DRS app will be used to catch anyone who uses it when over a second behind the guy in front. The best way to use this app is simply to always wait for the BEEP & react quickly to the “angry” BEEPs you get when using DRS illegally. Make sure you have the correct drs.ini installed for each track.

3 ERS Guide 

3.1 MGU-K Deployment Modes 

Revamped completely so that mode 1 is lowest ERS usage, mode 5 is highest:-

  • 0. Manual – Use this to recharge the battery or to replace modes with the manual use of KERS.
  • 1. Economy – lowest ERS usage for high top speed tracks where you are on the throttle more.
  • 2. Low – suited to high speed tracks or to replenish MGU-K on lower speed tracks.
  • 3. Medium – Somewhere in the middle.
  • 4. High – used on tracks with lots of corners and fewer long straights.
  • 5. Ultra – your quali mode (on all but the longest tracks) and equivalent to the Kunos “Hotlap” mode. Highest energy output from MGU-K.

Qualifying – use the highest mode that just empties the lap allowance, On a lot of tracks this is “5 – Ultra”, but at Spa it will probably even be as low as mode 2 – Low.


  • Hi speed tracks – Economy mode will see you good on any high speed track, switch to other modes for short stints or use KERS to supplement power. Make sure you stay within the lap allowance.
  • Medium speed tracks – Use 2, 3, 4 – it’s your choice now.
  • Low speed tracks – High or even Ultra if you can get away with it, otherwise modes 3, 4 should be OK.

3.2 MGU-K Recovery (Levels 0 – 10) Low levels give more stability under braking, but most people can cope in this car with the higher levels 8-10. You will need 10 at an “ERS thirsty” track like Silverstone.

3.3 Engine Braking (Levels 0 – 13) This is a matter of preference. High values give you better fuel consumption (more “free braking”) but make the rear less stable, low values are easier to manage but mean you are more likely to run through a corner as you release the brake pedal.

4. TyresFX Compounds