Originally Posted by John_S
hi guys i recently purchased an fk05 and i am very happy with the car,but i need a little help with the setup. I am running the box standard kit setup but have a diff up front and i am experiencing an on power push and off power oversteer. Do you guys have any quim fixes for this? I have the optional spring set, so i can play with the springs a bit if i need to.
I'd suggest running 1.5d anti-dive up front with front pin holders on front arm set in the middle hole and the rear pin holders set in the top hole. This should get rid of the off power oversteer by keeping more weight on the rear during corner entry. Also, make sure you don't have more than 3.5mm of rear droop (uptravel of the chassis from rest until the rear wheels lift off the ground). I set my rear droop to 0 or 1 on the guage, depending on ride height. This will allow just enough initial weight transfer to the front for aggressive front end response, but not enough to induce oversteer.
Then, increment your front droop screw setting by .5mm and test the car. Keep screwing in the droop screw by .5mm increments until you get rid of the push. I've found that 1.5 or 2 on the droop guage is best for the front arms. This should get rid of the on power push by keeping the front of the car low to the ground, which keeps weight over the front axle and uses the aerodynamics of the body's front spoiler.
From my recent experience at the race this past weekend, I would not recommend using anti-squat on the 05. I've been running anti-squat for a couple of weeks now and I kept having a problem with mid corner oversteer in tight corners, taken at full lock, with fast entry speeds. I found the only way to allow enough weight to shift rearward fast enough at mid corner was to trim up neutral to a roll on my transmitter and increase the front droop by 1mm (lets the front insde wheel lift up at mid corner and transfer more weight to the rear outside wheel). But these settings gave too much on power push as a result. So I'd suggest decreasing front droop to cure the off power oversteer.
These recommendations are for rubbers on low to medium grip asphalt. For medium to high grip carpet, I've found that anti-squat works well if you have softer and wider rear foams. I use 40 shore 26mm fronts and 35 shore 30mm rears. The wider rear foams keep the car from oversteering, but allow the rear to rotate around at mid corner very well since they are not loaded with as much weight due to the anti-squat. But I haven't been able to get the same affect from rubbers even when using CS27s up front and CS22s on the rear.