2503801
full race
Honda K20A
I-4cyl 2.0L 16v DOHC (RPR/RPR)
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intake
exhaust
camshaft data:
lash ramp
: 0.30mm
0.30mm
duration @ 0.1mm
: 300°
292°
duration @ 1.0mm
: 266°
258°
valve lift
: 14.50mm
13.75mm
cam lift
: 9.30mm
7.85mm
lobe angle
: 106°
106°
timing @ 1.0mm
: 27° / 59°
55° / 23°
valve lift @ TDC
: 5.25mm
4.60mm
parts setup:
cam wheels :
:
: View THO024
follower
: View INFO
: View INFO
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
: O.E.M.
: O.E.M.
exterior spring
: View PAC-E15009
: View PAC-E15009
interior spring
: View PAC-I15009
: View PAC-I15009
fitted load / length
: 31kg @ 35.0mm
: 31kg @ 35.0mm
max. load / lift
: 110kg @ 14.5mm
: 110kg @ 14.5mm
REMARKS :
#
8x CAT026 rocker arm (in)
#
8x CAT027 rocker arm (ex)
#
6x CAT026-SHAFT + 2x CAT026-SHAFT K20
#
16x CAT026-R2
REMARKS :
#
Camshafts for use without Vtec system, using outer cam lobes and outer rocker arms only:
- the complete rocker arm assembly is replaced by a shaft with two Cat Cams slipper rocker arms and spacers
- profiles with a more aggressive design to fully exlpoit the more stable valve train
- use adjustable sprocket "THO025" to disable the intake VVT system
- 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
#
Valve lift and timing data are illustrated on a locked centerline. The VANOS system changes the centerlines and therefore the timing data and lift on TDC.
-
The centerline and TDC data should not be used when installing the camshaft with full cam intake retard (disengaged VANOS system)!!! WRONG INSTALLATION WILL CAUSE THE VALVES TO HIT THE PISTONS!!!
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We insist to install the VANOS camshaft(s) in such way that the distance between valves and piston is at least 1mm at full advance of the intake (or full retard at the exhaust)
#
ONLY for use in competition engines with independent engine management (throttle position sensor) or carburettors