Tech info: I hereby post my set-up sheets from the GP3F last weekend. The race was run on high grip conditions, with a typical flowing TC layout. The controlled tire (Rush 28CPM) provided a lot of grip, and with a quite soft side wall, also meant that grip rolling was an issue.
I would like to share some of the key changes made to the setup of my XRAY X4'24 car:
2.0mm topdecks instead of 1.6mm made the car flatter in the center chicane, and improved drivability.
3.0mm shock holder shimming instead of 4.0mm improved side bite and allowed me to "lean on the car" more.
Less front static camber made the car less edgy, and reduced initial steering.
Active rear shock holder made the car more forgiving to drive in the infield, and improved my consistency a lot.
Softer shock oil (425 instead of 450) made the car less reactive and thus, more forgiving to drive, and also less likely to grip roll over curbs. PSS was once again my preferred shock setup in front and rear.
Super gluing of front tire sidewalls to 59mm was necessary to reduce traction rolling, especially when touching curbs. I've posted a video on how to do this
Shorter front than rear additive timing to reduce front grip.
As for Hobbywing ESC setting, no major changes from my basic carpet TC setting. I did go down in throttle rate as well as end bell timing slightly to make the power band less punchy. As usual, 5.0T motor with 12.1mm rotor (#30820019) was my choice on this carpet track.
My Nosram 4200 shorty packs worked flawlessly as always, and were charged to 4.15V per cell at 9A. I didn't fully charge the packs to reduce the punch at the start of the run, to improve drivability, and to give a more consistent power band for the duration of the run. My practice packs are already 1 year old, with no sign of reduced IR and zero puffing. I'm super impressed by these packs!
