PORSCHE 911 PROFILES

            We can regrind any standard 911 or 930 to factory specs.  Also, an excellent way to perk up your street 911 is to put the next wilder 911 profile on your cams.  Always check the piston to valve clearance when changing the cams from what was originally in the engine.  Our duration figures are the end of the clearance ramp.  Cam lift figures are at the cam.  Always use new or reconditioned rocker arms.  Remove and clean the cam carrier oil tubes.  The wiping pattern of the rockers should also be checked. 

1.45:1 AVG.    ROCKER ARM RATIO 1.5:1  RATIO  ON 906 ROCKER ARMS

 

FUEL INJECTED MOTOR CIS

GRIND NO.

SEAT DURATION

CAM LIFT

LASH

APPLICATION

911 CIS T

245

238

.254

.234

STD

1973-75 CIS 911 T

911 CIS S CARRERA

255

238

.277

.234

STD

CAN GRIND 1973-77 CIS 911 T TO THESE SPECS

IMPROV.

STOCK

255

238

.277

.234

STD

CAN GRIND YOUR CIS 911 S TO THESE SPECS. MORE LOBE AREA

78-UP SC WITH CIS

268

260

.305

.271

STD

CAN GRIND ON YOUR CIS 911 S MUST USE EURO PISTONS FOR VALVE TO PISTON CLEARANCE

IMPROV. STK

268

260

.305

.271

STD

CAN GRIND YOUR SC CAMS TO THESE SPECS. MORE LOBE AREA

 

CARBURATED MOTORS

911 T

260

254

.263

.235

STD

CARBURATED 911 T

911 E& 911 L

270

260

.273

.263

STD

CAN GRIND YOUR CARB. 911 T TO THESE SPECS

1966 SOLEX

280

270

.302

.273

STD

CAN GRIND YOUR CARB. 911 E TO THESE SPECS

911 S

300

270

.304

.273

STD

CAN GRIND YOUR CARB. 911 L, E, OR SOLEX TO THESE SPECS

ELGIN

911 S

296

276

.320

.300

STD

CAN GRIND YOUR CARB. 911 S TO THESE SPECS.

906 CAMS FACTORY

318

292

.316

.277

STD

CAN GRIND 911S TO THESE SPECS

RACING CAM FOR TOP END POWER

SPRINT CAMS FACTORY

318

306

.316

.305

STD

CAN GRIND 911S, 906 TO THESE SPECS.  TOP END LARGE ENGINES

 

ELGIN PORSCHE 911 CAMS

GRIND

SEAT DURATION

VALVE LIFT

LOBE CENTER

LIFT AT LAP

T cis and 930 turbo

245 I

238 E

.368

.339

108

0.5-0.7 mm for cis 911T

0.65-0.80 mm for 1978-81 30 turbo

S cis

255 I

238 E

.401

.339

113

0.4-0.54 mm

For Improved Stock, use high # of range.

SC cis

268 I

258 E

.450

.395

113

1.4-1.7 mm 1978-80 R.o.w., 1980-83 US SC. 0.9-1.1 mm 1976-77 3.0 Carrera. 1978-79 US SC, 1981-3 R.o.w. 911SC.

1.1-1.4 mm 1984-87 3.2 Carrera.

For imporved stock, use high # of range.

C2 and C4

280 I

262 E

.470

.430

113

1.26 mm +/- .1mm for 911 Carrera 2/4

T carb.

260 I

254 E

.385

.345

105

2.3-2.7 mm

2.4-2.8 mm 1972-3

E or L carb.

270 I

260 E

.405

.390

102

3.0-3.3 mm

1966 SOLEX

280 I

270 E

.440

.405

97

4.2-4.6 mm

S carb.

300 I

270 E

.450

.395

98

5.0-5.4 mm

Mod. S

296 I

2767 E

.470

.440

102

4.5 mm

306/288

306 I

288 E

.496

.463

102

5.0 mm

310/296

310 I

296 E

.490

.465

100

6.0 mm

315/300

315 I

300 E

.504

.471

100

5.8 mm

906 Carrera

318 I

292 E

.460

.403

95

6.8 mm +/- 0.1 mm

SPRINT RSR

318 I

300 E

.460

.450

101

6.8 mm

320/304

320 I

304 E

.510

.480

100

6.5 mm

IMSA

342 I

321 E

.525

.500

100

7.2-7.4 mm

Group B Turbo

269 I

254 E

.370

.337

106

1.8-1.9 mm

ELGIN Mod B

270 I

255 E

.402

.399

106

2.9-3.3 mm

ELGIN Turbo

266 I

252 E

.454

.418

108

2.2 mm

 

ELGIN CAMS FOR PORSCHE 911SC, 911C2 AND 911 TURBO

 

Name

Seat timing

0.04

0.05 Lift

Lobe Centers

Lift @ overlap w/ std. lash

Description

ELGIN SC 330

274

264

244

234

238   0.451

228   0.392

113

113

1.8-2.0 mm

1 step up for 911SC works well in stock engine. Hot cam for 911 turbo.

ELGIN SUPER C-2

280

270

247

236

242   0.475

230   0.455

113

113

2.2-2.4 mm

1 step up for 911C2 works well in stock engine. Hot cam for 911SC w/ 10-1 c/r

ELGIN

282int.

276exh.

282

274

254

244

247   0.491

237   0.461

113

113

2.4-2.6 mm

high performance cam for 911 C2 10.5+ c/r

very hot 911SC/turbo cam

ELGIN

296int.

276exh.

296

276

266

249

259   0.474

242   0.438

108

108

3.0-3.2 mm

for  turbocharged engines 3.0 litre and up, up to 7500rpms

ELGIN

302int.

296exh.

306

296

271

166

264   0.485

259   0.474

108

108

3.8-4.2 mm

for turbocharged engines 3.4 litre and up, up to 8000rpms

c/r = compression ratio

(all numbers at the valve with zero lash)

ELGIN CAMS

RACING 911 PROFILES

 

Name

Seat timing

0.04

0.05 lift

lobe centers

lift @ overlap w/ std. lash

Description

ELGIN

296int.

276exh.

296

276

266

249

259  0.474

242  0.438

102

102

 

4.5 mm

popular cam! direct replacement for early 911s cam, more power & torque

ELGIN

306int.

288exh.

306

288

271

255

264  0.485

248  0.452

102

102

5.0 mm

 

next step up 2.4 litre and up “S”

ELGIN

310int.

296exh.

310

296

280

266

273  0.498

259  0.478

100

100

6.0 mm

2.4-2.9 litre 4500 rpms and up 11-1 c/r

ELGIN

314int.

296exh.

314

296

283

265

276  0.508

258  0.474

100

100

 

6.2 mm

2.8-3.2 litre 4800 rpms and up 11.5-1 c/r

ELGIN

315int.

300exh.

315

300

285

273

277  0.501

266  0.474

100

100

 

6.2 mm

3.0 litre and up 5000 rpms and up 12-1 c/r

ELGIN

320int.

304exh.

320

304

292

276

285  0.518

269  0.492

100

100

 

6.5 mm

our most popular cam 3.2 litre and larger.  5200 rpms and up.  12-1 c/r

ELGIN

324int.

304exh.

324

304

294

275

286  0.537

268  0.498

100

100

 

6.8 mm

latest revision of 320/304 cam, a little more lift and lobe area!

3.8 RSR

RSRint.

RSRexh.

315

290

282

264

275  0.482

258  0.486

109

109

 

 

factory 3.8 litre rsr cam, elgin 320/304 on 106 makes more power/torque in this engine

P906

906int.

906exh.

322

292

290

262

283  0.463

255  0.406

95

95

 

6.8 mm

outdated factory profile, good for vintage 2.0-2.4 litre lightweight race car

RSR

318int.

292exh.

318

292

 

        0.46

        0.45

101

101

 

 

 

c/r = compression ratio

{all numbers at the valve with zero lash}

PORSCHE 911 PROFILES (CONTINUED)

 

GRIND NO.

SEAT DURATION

CAM LIFT

LASH

APPLICATION

310/296

310

296

.333

.320

I .004

E .004

FOR ENGINES UP TO 2.5 LITRE.

MORE POWER THAN 906 & SPRINT

320/304

320

304

.350

.330

I .004

E .004

FOR 2.7-3.5 LITRE ENGINES.

FITS 906, SPRINT, AND S CORES

340/320

340

320

.350

.330

I .004

E .004

TOP END RACING CAM FOR OVER 3.5 LITRES.

THE ONLY WAY TO PUT A RACING GRIND ON A MILDER SET OF CAMS IS TO WELD UP THE LOBES.  ALLOW THREE WEEKS FOR THIS PROCESS.

 

930

245

238

.254

.234

I  STD.

E STD.

STOCK 930 TURBO CAMS

Group B Turbo

269

254

.254

.234

I  STD.

E STD.

FACTORY GROUP B TURBO GRIND.

ELGIN MOD B

270

255

.277

.275

I  STD.

E STD.

IMPROVED GRIND FOR GROUP B

78-UP CIS SS

268

260

.305

.271

I  STD.

E STD.

STREET PERFORMANCE GRIND FOR 330.  LASH CAPS ARE REQUIRED.

ELGIN

TURBO

266

252

.313

.288

I  STD.

E STD.

CAN GRIND SC CAMS TO THESE SPECS.  GOOD FOR TURBO MOD

 

 

If you have a car in mind, which is not listed, please call us!