Jump to content

From the lab... something for you autox guys.. quick refere


Guest Anonymous
 Share

Recommended Posts

Guest Anonymous

TO REDUCE UNDERSTEER or INCREASE OVERSTEER:

Front tires:

- Increase tire pressure in 2.5psi increments

- Increase Section Width

- Lower the Aspect Ratio

- Reduce front tread depth

Rear Tires:

- Reduce tire pressure in 2.5psi increments

- Reduce section width

- Install higher aspect ratio tires

- Increase rear tread depth

Front Wheels:

- Install wider wheels

- Install lighter wheels

Rear Wheels:

- Install narrower wheels

- Install heavier wheels

Front Alignment settings:

- Dial in more negative camber

- Dial in More toe-out

- Dial in more positive caster

Rear Alignment settings:

- Dial in more positive camber

- Dial in more toe-out (Same as front)

Anti-Sway bars:

- Soften the Front

- Stiffen the Rear

Spring rates:

- Soften the Front

- Stiffen the Rear

Shock absorbers:

- Soften the Front

- Stiffen the Rear

Suspension Bushings:

- Soften the Front

- Stiffen the Rear

Brake Proportioning

- Reduce Front brake pressure

- Increase rear pressure

Weight Distribution

- Reduce front weight

- Increase rear weight

Aerodynamics:

- Increase Front Downforce

- Reduce rear downforce

---------------------------------------------------------------------------------

TO REDUCE OVERSTEER or INCREASE UNDERSTEER:

Front tires:

- Decrease tire pressure in 2.5psi increments

- Decrease Section Width

- Install higher Aspect Ratio tires

- Increase front tread depth

Rear Tires:

- Increase tire pressure in 2.5psi increments

- Increase section width

- Reduce aspect ratio

- Decrease rear tread depth

Front Wheels:

- Install narrower wheels

- Install heavier wheels

Rear Wheels:

- Install wider wheels

- Install lighter wheels

Front Alignment settings:

- Dial in less negative camber

- Dial in less toe-out (to toe-in if needed)

- Dial in less positive caster

Rear Alignment settings:

- Dial in less positive camber

- Dial in less toe-out (Same as front)

Anti-Sway bars:

- Stiffen the Front

- Soften the Rear

Spring rates:

- Stiffen the Front

- Soften the Rear

Shock absorbers:

- Stiffen the Front

- Soften the Rear

Suspension Bushings:

- Stiffen the Front

- Soften the Rear

Brake Proportioning

- Increase Front brake pressure

- Reduce rear brake pressure

Weight Distribution

- Increase front weight

- Decrease rear weight

Aerodynamics:

- Reduce Front Downforce

- Increase rear downforce

Link to comment
Share on other sites

Guest Anonymous

ryan_phelps.jpg

It's always worth it to play with tire pressures at the course....I run Hoosier 225/45 13 A3SO3's. I have eibach springs bilstein sports and 22mm front and rear sways....At the last auto-x I found my optimal tire pressures to be 38 psi in the front and 28 psi in the rear..At that point the car handles pretty neutral...

Ryan

68 02

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

  • Upcoming Events

×
×
  • Create New...