2503405
turbo conversion
Honda F20C
I-4cyl 2.0L 16v DOHC
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intake
exhaust
camshaft data:
lash ramp
: 0.35mm
0.35mm
duration @ 0.1mm
: 299°
284°
duration @ 1.0mm
: 246°
230°
valve lift
: 12.95mm
12.00mm
cam lift
: 7.50mm
6.90mm
lobe angle
: 110°
120°
timing @ 1.0mm
: 13° / 53°
55° / -5°
valve lift @ TDC
: 2.80mm
0.95mm
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
: View 99356/s
: View 99356/s
lower retainer
: remove
: remove
exterior spring
: View PAC-E15009
: View PAC-E15009
interior spring
: View PAC-I15009
: View PAC-I15009
fitted load / length
: 30kg @ 35.7mm
: 30kg @ 35.7mm
max. load / lift
: 108kg @ 14.0mm
: 108kg @ 14.0mm
REMARKS :
#
Replace lower retainer with flat shim of approximately 1mm thickness.
#
Spacer 93-25003 replaces the vtec rocker arm.
REMARKS :
#
Camshafts for use without Vtec system, using outer cam lobes and outer rocker arms only:
- the Vtec rocker arm is replaced by a spacer (available)
- profiles with a more aggressive design to fully exlpoit the more stable valve train
- check interference between cam and rocker arm, modify rocker arm if required
- Leave the VTEC solenoid constantly in the "VTEC ON" position (high oil pressure) to allow sufficient oil supply to the complete cylinder head.
#
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
#
for TURBO conversion (atmospheric to turbo)