Oversteer on braking

Community Hub Community Content Tuning
,
1

Hello. I am having a problem with my fwd 1997 Civic Type R. Upon braking, the rears lock up heavily. What I have already done is: Widening rear tires, putting on a roll cage to get more weight in the rear, and moved the brake bias forward and reduced pressure. It is now somewhat better than before but still hard to control.

2

Base: Drop the car as low as possible. Balance springs and dampers to ratios that reflect weight distribution. Set antiroll bars to reflect tire width ratio (none of that 1 & 65 insanity). Set front brake bias to 60%, possibly higher, set pressure to your preferences (avoiding lockup).

Next steps: If you’re still facing snap oversteer on braking, it could be that bump settings are too soft. Use stiffer bump settings (maintaining weight distribution ratios front & rear). That should slow the rate of weight transfer forward and mitigate the snap oversteer.

1 Like
3

How do I do that? My front and rear tire widths are both 205/45R16 on Street tires.

4

increase front rebound

5

This would cause the weight to transfer front-to-back earlier while already in a turn, not heading into the turn. End result in more understeer from mid-turn to exit.

1 Like
6

No, this would speed up the return rate on the front, keeping more weight on the rear of the car. Not sure what mid corner and exit has to do with it. He asked how to get rid of locking up the brakes. The reason its locking up is the weight is shifting off of the rear tyres under braking and the contact patch is decreasing.

7

To fight inherent FWD understeer you basically have to tune ARBs reverse to what weight distribution suggests. So usually you will want to have front ARBs lower than rear ARBs as most (all) FWD cars have their weight shifted to front.

1 Like
8

Try putting the brake bias at the exact opposite (or at least more towards rear) from what it’s at now. For some time there was a bug in Forza with brake bias being backwards, I’m not sure though if any recent updates have fixed that yet

1 Like
9

Horizon brake bias setting works backwards, set to rear for front and to front for rear

1 Like
10

Decrease rear bump and if you want you can make the rear camber flatter.