DOUGHERTY RACING CAMS  530-672-2286  EMAIL
 
 
  Camshafts for Porsche 911, 930, 964, 993 engines
All new 47mm or 49 mm chill cast camshafts use the later (1981+) style bolt and washer.  
Model Duration at 1mm Duration at .050" Valve lift Lobe separation angle Lift @ overlap setting
Porsche 2.7 CIS S I/E 226/206 220/200 .405"/.350" 110 1.1 mm
47mm
49mm
Grind your 2.7 cores
Porsche 911 E
  
47mm
49mm
I/E 238/226 230/222 .405"/.393" 102 3.0-3.3 mm
Grind your E or T cores
Porsche 911 Solex I/E 248/236 242/230 .455"/.414" 97 4.2-4.6 mm
47mm
49mm
Grind your Solex cores
Porsche 911 S MFI I/E 268/240 263/235 .455".399" 98 5.0-5.4 mm
47mm
49mm
Grind your S cores
Porsche 911 SC /3.2 Carrera I/E 236/224 228/218 .450".395" 113 1.4-1.7 mm
47mm
49mm
Grind your SC/3.2 cores
Porsche 964 C2 / C4 I/E 246/232 238/226 .470"/.430" 113 1.26 mm
47mm
49mm
Grind your SC/3.2 or 964 cores
Porsche 3.8 Super Cup I/E 248/234 242/228 .490".455" 112 2.0 mm
47mm
49mm
Grind your 964 cores
Porsche  GT2 Evo I/E 254/238 248/232 .485"/.470" 112 2.5 mm
47mm
49mm
Porsche  906  Carrera 6 I/E 290/262 283/255 .463"/.405" 96 6.8 mm
47mm
49mm
Porsche RSR Sprint I/E 278/267 272/262 .470"/.450" 101 6.2 mm
47mm
49mm
Porsche 3.8 RSR I/E 280/264 275/258 .490"/.490" 109 4.6 mm
47mm
49mm
Dougherty Racing profiles Duration at 1mm Duration at .050" Valve lift Lobe separation angle Lift @ overlap setting
All new 47mm or 49 mm chill cast camshafts use the later (1981+) style bolt and washer.  
DC 10 I/E 242/228 236/222 .461"/.402" 110 2.0-2.4 mm 2.7 CIS upgrade
47mm
49mm
         
DC 12 I/E 240/232 234/226 .474"/.430" 102 3.4-3.6 mm
47mm
49mm
DC 13 I/E 240/230 234/224 .475".425" 113 1.6-1.8 mm High lift SC type cam
47mm
49mm
DC 15    Sport SC I/E 244/234 238/228 .451"/.395" 113 1.8-2.0 mm 3.0 8.5-1 compression
  
47mm
49mm
                        
DC 19 I/E 246/232 238/226 .485"/.450" 113 1.8-2.0 mm
Grind your SC / 3.2 cores  
47mm
49mm
DC-993SS I/E 248/234 242/228 .490".455" 114 1.6-1.8 mm Hot 3.2L or 964 upgrade
 
47mm
49mm
    
DC 21 I/E 248/238 242/232 .490"/.470" 112 2.0 mm
 
47mm
49mm
DC 24 I/E 254/244 247/237 .485"/.460" 113 2.4-2.6 mm
47mm
49mm
DC-30   "Mod-Solex" I/E 248/236 242/230 .455"/.414" 102 3.8 mm
47mm
49mm
DC 35   EFI or Turbo I/E 258/238 252/232 .490"/.470" 112 2.4-2.6 mm
47mm
49mm
DC 35   carburetor type I/E 258/238 252/232 .490"/.470" 102 3.8-3.9 mm
47mm
49mm
DC 40   "MOD-S" I/E 266/249 259/242 .474"/.440" 102 4.5 mm
47mm
49mm
DC 43x-102 carburetor type I/E 264/248 258/242 .490".455" 102 4.4-4.6 mm
 
47mm
49mm
DC 43-112 EFI or Turbo I/E 264/248 258/242 .490".480" 112 3.0 mm
 
47mm
49mm
DC 44 I/E 264/254 258/248 .490".480" 112 3.2-3.4 mm
47mm
49mm
DC 60 I/E 271/255 264/248 .485".450" 102 5.0 mm
47mm
49mm
DC 65 I/E 272/258 266/250 .508".485" 102 5.2-5.3 mm
47mm
49mm
DC 70 I/E 274/264 268/258 .505".485" 100 5.2 mm
47mm
49mm
DC 80 I/E 283/265 276/258 .505"/471" 100 6.2 mm
47mm
49mm
DC 85 I/E 286/264 278/258 .514"/490" 100 6.1-6.2 mm
47mm
49mm
DC 100 I/E 292/274 284/266 .530"/.495" 100 6.5 mm
47mm
49mm
Turbo specific profiles Duration at 1mm Duration at .050" Valve lift Lobe separation angle Lift @ overlap setting
All new 47mm or 49 mm chill cast camshafts use the later (1981+) style bolt and washer.  
Porsche 930 turbo I/E 214/202 208/197 .368"/.339" 108 .80 mm
Grind your 930 cores
49mm
Porsche 930 turbo cheater I/E 226/214 220/208 .405"/.368" 111 1.1 mm

Grind your 930 cores

49mm

SC on Turbo I/E 236/224 228/218 .450"/.395" 113 1.4-1.7mm
49mm
964 I/E 246/232 238/226 .470"/.430" 113 1.26 mm
49mm
DC-993SS I/E 248/234 242/228 .490"/.455" 114 1.6-1.8 mm
49mm
GT 2 Turbo I/E 254/238 248/232 .485"/.470" 112 2.5 mm
49mm
DC 35-112   I/E 258/238 252/232 .490"/.470" 112 2.4-2.6 mm
49mm
DC 43-113 I/E 264/248 258/242 .490"/.480" 112 3.0 mm
49mm
DRC 935 I/E 266/266 259/259 .474"/.474" 102 4.5 mm
47mm
49mm
All lift values are based on zero lash and theoretical rocker arm ratios. Your results may vary.
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  Not affiliated with Porsche of North America nor Porsche AG  
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