Stingray Corvette Forum banner

1 - 3 of 3 Posts

·
Registered
Joined
·
95 Posts
Discussion Starter #1 (Edited)
Service ramps available at local auto superstores can normally accommodate 9" wide tires and have a slope of 17˚. This is way to steep for a C7 Corvette. It's also too narrow for safety conscious DIYers.. The approach angle is slightly different depending upon the vehicle trim package. For example, a base Corvette will have a higher approach angle than a Z06.

Race Ramps devised a simple yardstick go/no-go test to empirically determine if your car is compatible with one of two ramp angles used on most of the Race Ramps service ramps, 10.8˚ and 6.8˚. This test is described in the attachment below.

Yardstick_test2_small.png
 

·
Registered
Joined
·
95 Posts
Discussion Starter #2
Determiniing the actual approach angle...

The go/no-go Race Ramps yardstick test is okay to confirm whether or not your car can make it up a ramp with a 10.8 degree or 6.8 degree incline. There are a couple of easy ways to approximate the actual approach angle.

A scrap piece of 30" x 12" corrugated cardboard can be folded into a ramp template as shown in the attachment. Cutting or folding the length of the higher leg on the template until it just fits under the car will provide a reasonable estimate of the approach angle.

Keep in mind that the heights shown in the drawing are not related to the 7.25" and 5" measurements in the Race Ramps yardstick test because a yardstick is 36" long and the cardboard ramp template is only 24" long.

cardboard_ramp_gauge+text2.png
 

·
Registered
Joined
·
95 Posts
Discussion Starter #3
Clinometer or iSetSquare app

For those looking for a more precise measurement you can get a Clinometer or iSetSquare app for your smart phone. Zero out the app with the phone on the ground, wedge a straight edge up against the tire, raise the opposite end of the straightedge until it makes contact with the car anywhere along its length, then read the approach angle off the app.

clinometer_calibration.jpg clinometer_reading_s.jpg
 
1 - 3 of 3 Posts
Top