6402708
hot street - dirt track
Subaru H4SO
B-4cyl 2.5L 16v SOHC (RPR/RPR)
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intake
exhaust
camshaft data:
lash ramp
: 0.30mm
0.25mm
duration @ 0.1mm
: 292°
287°
duration @ 1.0mm
: 252°
247°
valve lift
: 12.05mm
10.40mm
cam lift
: 6.55mm
6.55mm
lobe angle
: 106°
106°
timing @ 1.0mm
: 20° / 52°
50° / 17°
valve lift @ TDC
: 3.60mm
3.10mm
parts setup:
cam wheels :
:
:
follower
: O.E.M.
: O.E.M.
valve lash
: O.E.M.
: O.E.M.
valve
: O.E.M.
: O.E.M.
valve locks
: O.E.M.
: O.E.M.
upper retainer
: 99365
: 99365
lower retainer
: 99433/O
: 99433/O
exterior spring
: View PAC-S90019
: View PAC-S90019
interior spring
fitted load / length
: 31kg @ 35.5mm
: 31kg @ 35.5mm
max. load / lift
: 80kg @ 12.5mm
: 80kg @ 12.5mm
REMARKS :
REMARKS :
#
- roller rocker arms with lash adjustment screw
- bearing diameters: 32.0mm
- cam base diameter: 34.0mm (1 bearing cap for complete camshaft)
- 2 intake + 1 exhaust cam lobes per cylinder
- no VVTL
#
FOR COMPETITION APPLICATIONS ONLY. Following details must be verified:
-
the camshafs must turn smooth in the cylinderhead, provide free travel by machining where needed
-
distance between valve seal and retainer at full lift must be 0.6mm at least
-
minimum valve spring travel of 1.0mm at full lift must be provided
-
distance between valve and piston 1.0mm (pref. 1.5mm). check 5-15° before TDC on exhaust, and after TDC on intake
#
ONLY for use in competition engines with independent engine management (throttle position sensor) or carburettors