Hi mate, I was at Stotfold on Sunday as well. I was running the RB5 Vega. I have endured weeks and weeks of the pain you are feeling now and unfortunately there is no miracle cure. Ballistics help, but the difference is minimal so they are not the difference between having grip or not. For me, the things that helped me most were moving my rear camber links in one hole on both the hub and the shock tower and buying the optional rear hubs to add more toe in.
The main difference for me though is practice. I have been trying to lay the power on gently from day one, turning in gradual, avoiding sudden movements, braking gently and only when approaching a corner but before turn in to try and keep the back end in line.... everything I thought would help basically but to no avail. This sunday though I finished third in all 3 heats (PT failed in the final
) and things felt more under control. I was still two laps down on the winner, but Simon is an F1 status driver so there is no shame in that for me as three weeks ago I was coming last week in week out
So, whilst you can make some changes which will help (never driven a b4.1/c4.1 so cant comment on specific set up changes) the biggest difference will come from you learning the track and practicing.
From my experience, assuming the track layout is as was on Sunday then turn 1 at the end of the straight is ok to coast round at speed, turn 2 you have to be very gentle on the power after the small rumble strips/jumps unsettle your balance, turn 3 into the tabletop is slippy, turn 4 after the tabletop is ok as the camber helps you, turn 5 is awful - next to no grip, turn 6 is the opposite - lots of grip by comparison, turn 7 which takes you up the hill was medium grip, turn 8 into the wall was quite slippy if you werent carrying sufficient forward momentum, the wall itself (turn 9) was ok, as was turn 10 back into the straight.
Once you learn what each part of the track is like then this in itself will help you to drive accordingly.
