Alright, so I am a fairly decent AWD and RWD tuner. When it comes to FWD I struggle for a decent tune. I run with no assists except for ABS. Previously I have settled in B class for past Forza games, but this one I feel comfortable in A class and as such, I am finding it hard to get a FWD tune sorted. I don’t have an issue with gear tuning so the car is normally fast enough, it is more the suspension/diff kind of things where I have issues.
Would wider front/rear tyres help or cause issues? Can someone point me in the direction I should be heading?
FWD cars should always have a lower diff setting because there is no weight transfer to them, so they will slide otherwise; a good, average diff setting is 30%. To help with this, make the front of your car a bit lower than the rear, so that the weight of the engine provides consistent weight over the accelerating wheels…this gives you more reliable torque. Take ABS off and set brakes more toward the rear because if they are 50% or more toward the front, you will be understeering like a boss since you will be locking your drive-wheels, which will really undermine steering in turns. I say take ABS off because with it on, for FWD cars at high speeds, this can cause odd handling because the computer will pulsate the brakes for you and may not let you steer how you’d like. FWD makes this worse since they are your drive wheels…it would be like quickly accelerating and braking back and forth while trying to steer…you won’t know if you’re steering in a brake or accelerating environment.
Keep rear suspension on the stiff side so that the weight transfer stays over the front wheels and dampen front bump stiffness. You can keep front spring tension to low-mid stiffness.
Since you’re driving FWD, try to keep your rear sway bars soft so that your rear doesn’t bottom you out…if they’re stiff, there will be less rear body roll, and instead, the rear will swing out.
My fault, accel diff should be around 30% for FWD cars. Rear depends on how you brake; try between 25-65%. Remember, with the braking diff, lower will be better for FWD cars because your front brakes do the most work and on turns, a lower diff setting will let the left and right wheels brake at different speeds to keep you moving. The higher your brake diff, the more your brakes will lock together, causing you to lose acceleration and steering control, especially during turns.
Sort front ARB and soft front Spring with 45% acceleration and 0% decc…if rear comes around softer rear ARB may be required. This method for the most part works for me but may not work for others (disclaimer)…lol… good luck!
Agree with all of this except the last part. You can get FWDs lift-off oversteering like the bejeebers in FM6, so sometimes you need to stiffen up the front a little and soften the rear. You can’t always get away with the chattering rear end the way you could on FM4. I wouldn’t bother tuning to A Class either. You will find you’re overworking the front of the car and wrestling with that rather than going fast. .A lot of FWDs even struggle as power builds in B Class.