- #36
- 2,425
- 408
kenny
Panhard bar should be mounted level at the desired RC height to begin with... don't know about that rule of thumb.
minimum stagger you need is:
D + .5 (TW) x CL \ D - .5 (TW)
where D is the track diameter in feet
TW = rear track width of the car in feet ( divide inch measurement by 12)
CL = the left rear tire circumference
example- race track has 200 ft. diameter
car has 64 inch track (64 / 12 = 5.33 inch)
left rear is 86 inch circumference.
run the numbers and you get 88.33 inch right rear circumference or MINIMUM 2.33 inch stagger.
if you run a spool add 10 percent to minimum stagger..if the track banking is 0 to 10 degrees, add another ten percent..if banking is 15 degrees up..take off ten percent from min. stagger
Four link has advantage of good forward bite because the upper links are mounted up hill. anytime the forward link is up hill the the rear end is trying to go up under the chassis during acceleration and this increases loading on the tires, these 4 links setups create oversteer as the body rolls. the right rear is pushed back and the left rear is pulled forward which helps the car turn going through the corner without breaking traction.
all I can tell you is ball park settings on the links..uppers should be 15 to 17 degrees up hill angle. the right upper max angle is 18 degrees and min. angle is 14 degrees.
the left upper usually has 3 to 5 degrees less angle than the right so the two links will be parallel through the corner. the lower links are usually 2 inches shorter. this reduces roll oversteer. the most common setting on the lowers is 5 degrees down.
Panhard bar should be mounted level at the desired RC height to begin with... don't know about that rule of thumb.
minimum stagger you need is:
D + .5 (TW) x CL \ D - .5 (TW)
where D is the track diameter in feet
TW = rear track width of the car in feet ( divide inch measurement by 12)
CL = the left rear tire circumference
example- race track has 200 ft. diameter
car has 64 inch track (64 / 12 = 5.33 inch)
left rear is 86 inch circumference.
run the numbers and you get 88.33 inch right rear circumference or MINIMUM 2.33 inch stagger.
if you run a spool add 10 percent to minimum stagger..if the track banking is 0 to 10 degrees, add another ten percent..if banking is 15 degrees up..take off ten percent from min. stagger
Four link has advantage of good forward bite because the upper links are mounted up hill. anytime the forward link is up hill the the rear end is trying to go up under the chassis during acceleration and this increases loading on the tires, these 4 links setups create oversteer as the body rolls. the right rear is pushed back and the left rear is pulled forward which helps the car turn going through the corner without breaking traction.
all I can tell you is ball park settings on the links..uppers should be 15 to 17 degrees up hill angle. the right upper max angle is 18 degrees and min. angle is 14 degrees.
the left upper usually has 3 to 5 degrees less angle than the right so the two links will be parallel through the corner. the lower links are usually 2 inches shorter. this reduces roll oversteer. the most common setting on the lowers is 5 degrees down.