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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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.