PORSCHE
356/912 PROFILES
Always recondition the valve lifters or replace them.
The early 356s used cast iron lifters which cracked and broke
under normal use, completely destroying the engine.
We prefer to grind your steel lifters with the proper radius to
match the taper on your cams.
ROCKER
RATIO: 3 BOLT STANDS = INTAKE 1.3:1, EXHAUST 1.13:1
2 BOLT STANDS = INTAKE 1.13:1, EXHAUST 1.13:1
GRIND
NO.
SEAT
DURATION
CAM
LIFT
LASH
APPLICATION
103N
255
255
.282
.282
I
.004
E
.006
STOCK
356 A & B
CORE
# NORMAL 103
102-15
256
256
.296
.296
I
.004
E
.006
STOCK
356 C
CORE
# 102-15
102-16
270
270
.320
.320
I
.004
E
.006
STOCK
256 S, SC & 912
CORE
# 102-16
66509-19
266
266
.303
.303
I
.004
E
.006
EXCELLENT
POWER FROM 1000-5000 RPM
M6708-18
268
268
.320
.320
I
.004
E
.006
MORE
LOBE AREA THAN 102-16 OR 105.
POWER 1500-5000 RPM.
7008-17
280
280
.333
.333
I
.004
E
.006
BROAD
POWER, 9.5:1, 2000-5500 RPM.
7010-17
280
280
.333
.333
I
.004
E
.006
10:1,
SOLEXS, 1720 KIT.
3000-6000
RPM
7208-17
288
288
.333
.333
I
.004
E
.006
HOT
STREET. 10:1, BIG CARBS, H.P. SPRINGS, 3400-6700 RPM.
7208-19
288
288
.369
.369
I
.004
E
.006
AUTOCROSS.
10:1, CARBS, H.P. SPRINGS
7508-18
300
300
.349
.349
I
.004
E
.006
VINTAGE
RACE. 10.5:1, 1 5/8 HEADER, 3400-6700 RPM.
7606-17
304
304
.380
.380
I
.004
E
.006
VINTAGE
RACE. 10.5:1, 1 5/8 HEADER, 3500, 6800 RPM.
7706-17
308
308
.369
.369
I
.004
E
.006
VINTAGE
RACE. 11:1, 1 5/8 HEADER, 3800-7200 RPM.
M7805-15
312
312
.412
.412
I
.006
E
.008
ROAD
RACE. 11.5+:1, 1
3/4 LONG TRACK, 1 5/8 ON SHORT TRACKS.
4800-7300 RPM.
WILDER
CAMS AVAILABLE FOR ALL OUT E PRODUCTION RACING.
DYNO TUNING NECESSARY. FULL
LIST ON ENGINE SPECIFICATIONS REQUIRED.
If you have a car in mind, which is not listed, please call us!
