Somewhat Newb tuner needs help

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1

I’m starting to have the same problem on most of my cars that I didn’t have when tuning in F4. Often when going into or coming out of a turn I have to fight the rear end coming around. I get control of the car but the non forward motion it had been going through has usually brought me down in speed, often lower to mid first gear.
I know accelerating out later will help as will breaking sooner. That aside, what are some key adjustments I can make to my set-ups so that I don’t have to crawl through turns just to keep my momentum running forward. BTW these are mostly if not all RWD. I’ve been tightening my differentials but that’s not nearly fixing everything and maybe making other things worse.
Any help would be great.
Thank you

2

Howdy doo, I can relate to your frustration. I’m just learning myself. Howsumever, I feel I’m finally starting to get a handle on things. Grain of salt brotha:

If my rearend is coming around braking into a corner I’m going to make sure my rear brake bias isn’t set too high.

If I’m getting a slight bit of oversteer on corner exit I might do any of these adjustments in small increments:
-Front Rebound- down
-Rear Rebound- up
-Front Bump- down
Rear Rebound- up

If I’m getting a slight bit of oversteer on corner entry I might change:
-Front Rebound- up
-Rear Rebound- down
Front Bump- up
Rear Bump- down

So if I’m oversteering on entry and exit I’m betting the car is setup to oversteer and I better look at the proportion of my ratio on springs and Anti-roll bars (ARB). So let’s say I’m rocking:
-Springs
Front- 500
Rear- 450
450 divided by 500 is .9, so I have a 90% ratio.
-ARB
Front- 20
Rear- 18
18 divided by 20 is .9, so I have a 90% ratio.

So I know lowering that ratio will help to reduce oversteer. I’ll try 85% first:
-So I’ll multiply 500 by .85= 425 and set my rear spring to 425.
-Then I’ll multiply 20 by .85= 17 and set my rear ARB to 17.
I’ll adjust that ratio until I get a good oversteer/understeer balance. Then slide the whole ratio proportionally to account for sloppiness or twitchiness and tweak from there.

3

I like the logic behind that Kong, but the thing you’re missing there is the weight. A vehicle’s weight can make a huge difference as well.

4

I’d like to ask a couple of questions first;

  • On corner entry; do you have a constant speed throughout the corner, or are you decelerating or accelerating?
  • Do you hear wheel squeal prior to losing the rear, or does it just break lose suddenly?
  • On corner exit; are you still turning when you apply throttle, or have you straightened out already?
  • On corner exit; are you full on the throttle when you start to lose control or any amount of throttle and you lose control?
  • Is this a tight hairpin that requires being in 1st gear to come out of it, or could you coast through in 2nd?
  • Are you losing control when downshifting/upshifting on corner entry/exit?
  • Are you using aero on these cars?