We strongly recommend having these cams nitrided after grinding
because of the wear problems they are known for.The valve lifters almost always go bad so it would be best if you
sent them along with your cam so we could measure and regrind them.
TAPPET
DIAMETER .687OR .800ROCKER ARM RATIO = 1.45:1 (AVG.)
GRIND
NO.
SEAT
DURATION
.050”
DURATION
CAM
LIFT
LASH
APPLICATION
MKI
240
200
.215
I
.008
E
.010
STOCK
LOW COMP. 1147cc
1500cc
247
247
210
205
.244
.242
I
.010
E
.012
STOCK
1500cc CAM
64510-12
258
209
.252
I
.011
E
.013
PERFORMANCE
1147, 1296cc LARGE TAPPET ENGINES.
6610-15
264
217
.262
I
.013
E
.015
2
STEPS UP COMP NEEDS TO BE RAISED.
7010-9
280
228
.263
I
.010
E
.012
HOT
STREET 9.5:1SPRINGS,
HEADER
71508-18
286
245
.305
I
.019
E
.021
AUTOCROSS/RACE
10:1.GOOD HEAD.
7508-12
300
250
.323
I
.014
E
.016
AUTOCROSS/RACE
11:1.
M7708-13
308
255
.321
I
.014
E
.016
ROAD
RACE 12:1, 5-7500 RPM MUST DYNO TUNE.
7708-12
308
263
.348
I
.016
E
.018
ROAD
RACE. MUST DYNO. 5500-7500 RPM.
7806-14
312
266
.328
I
.017
E
.019
GT313:1
If you have a car in mind, which is not listed, please call us!
