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SCCA SRF Spring Rate Data&Base Setup Info

SRF SPRING RATE & DEFLECTION DATA & BASE SET UP INFO

TIRE SIZE: P185/60ZR-13 SRF (46340)
RIM WIDTH = 13"x 5.5"

       AIR PRESSURE (PSI)    

LOAD (lbs)

18 psi 22 psi 26 psi

30 psi

400

1086 1242 1398 1545

450

1101 1253 1411 1560

500

1119 1266 1420 1573

550

1136 1280 1432 1585

600

1152 1294 1443 1596

650

1171 1306 1454 1605

700

1190 1322 1467 1616
            

TIRE SIZE: P205/60ZR-13 SRF (46350)
RIM WIDTH = 13"x 7.0"

       AIR PRESSURE (PSI)    

LOAD (lbs)

18 psi 22 psi 26 psi

30 psi

400

1120 1275 1446 1598

450

1128 1279 1453 1607

500

1136 1283 1457 1612

550

1145 1288 1461 1616

600

1155 1294 1467 1622

650

1164 1302 1470 1625

700

1175 1313 1476 1628

SCCA SRF BASE SET UP INFORMATION

FRONT
TIRE SIZE: P185/60ZR-13 SRF (46340)
RIM WIDTH = 13"x 5.5"

BASE SETTING

  ADJUSTMENT NOTES:
COLD TIRE PRESSURE 18 to 19 psi  
HOT TIRE PRESSURE 24 to 26 psi Hot 24 to 26 PSI / Track Grip / Driver feel dependent
CAMBER -3.7 to - 4.0 Track Grip / Hot Tire PSI / Turn in rate dependent
CASTER +5.5 to +6.5 Driver feel / Rear bump steer dependent
BAR .125" to .500" from full soft Track Grip / Driver feel dependent
SHOCK 9 to 12 sweeps from full stiff Track Grip / Driver feel dependent
TOE 0 to 2mm out total  
BUMP STEER .015" to .025" Out per inch of bump  
RIDE HEIGHT     3.25"  
RAKE   0.25" to .500" Positive / more for slow vs less high speed turns
        

REAR
TIRE SIZE: P205/60ZR-13 SRF (46350)
RIM WIDTH = 13"x 7.0"

BASE SETTING

  ADJUSTMENT NOTES:
COLD TIRE PRESSURE 18 to 19 psi

 

HOT TIRE PRESSURE 24 to 26 psi Hot 24 to 26 PSI / Track Grip / Driver feel dependent
CAMBER -3.4 to - 3.7 Track Grip / Hot Tire PSI / Turn in rate dependent
CASTER 0 to -1 Driver feel / Rear bump steer dependent
BAR ..500" to 1" from full soft Track Grip / Driver feel dependent
SHOCK 7 to10 from full stiff Track Grip / Driver feel dependent
TOE 1mm to 3mm in per wheel

Track Grip / more for slow vs high speed turns / Driver feel dependent

BUMP STEER .005" to .015" in per inch of bump  
RIDE HEIGHT      3.5" to 3.75"  
RAKE  

0.25" to .500" Positive / more for slow vs less high speed turns

NOTE: All measurements taken without driver, nose and tail weight.

 


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