All of the below measurements were taken at the cam, not at the
valve.The duration figures
at the valve are quite differrent from those taken at the cam because of
the radius rocker arm.
ROCKER
RATIO:NAP-Z=1.44:1240SX=1.47:1AVG.
GRIND
NO.
SEAT
DUATION
.050”
DURATION
CAM
LIFT
LASH
APPLICATION
STOCK
NAP-Z
247
243
202
200
.278
.278
I
.006
E
.008
STOCK
NAP-Z
330-21
247
243
206
206
.278
.278
I
.006
E
.008
IMPROVED
STOCK GRIND
FOR
NAP-Z
STOCK
240SX
244
259
187
196
.272
.272
I
HYD
E
HYD
240SX
330-18
246
265
193
207
.272
.272
I
HYD
E
HYD
IMPROVED
STOCK GRIND
FOR
240SX
BOTH
OF THESE PERFORMANCE PROFILES WORK EXCEPTIONALLY WELL WITH THE STOCK
FUEL INJECTION.WILDER PROFILES ARE AVAILABLE BUT ARE NOT PRACTICLE UNLESS
MAJOR MODIFICATIONS ARE DONE TO THE ENGINE.
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