5506403
tarmac rally - race
Renault F4R.874 Mégane III 250hp
I-4cyl 2.0L 16v DOHC (RPRH/RPRH)
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intake
exhaust
camshaft data:
lash ramp
: hydro
hydro
duration @ 0.1mm
: 276°
260°
duration @ 1.0mm
: 242°
226°
valve lift
: 11.55mm
10.85mm
cam lift
: 5.85mm
5.50mm
lobe angle
: 120° (124°)
118° (114°)
timing @ 1.0mm
: 1° / 61°
51° / -5°
valve lift @ TDC
: 1.10mm (0.76mm)
0.60mm (0.92mm)
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
: O.E.M.
: O.E.M.
lower retainer
: O.E.M.
: O.E.M.
exterior spring
: View PAC-E99862
: View PAC-E99862
interior spring
fitted load / length
: 31kg @ 34.5mm
: 31kg @ 34.5mm
max. load / lift
: 85kg @ 12.5mm
: 85kg @ 12.5mm
REMARKS :
REMARKS :
#
Camshafts for use in the Megane III turbo 250hp engine.
This engine uses a VVT camshaft on intake (as in the standard configuration)!
#
ONLY for dirt track applications and pro street use with adjustable engine management or carburettors
#
for BIG TURBO conversion (std to big turbo)
#
Check distance between valves and piston to be 1mm at least with VVT engaged. Wrong installation will cause severe engine damage!
#
VVT reprogramming, operating range adjustment or even eliminating the VVT system should be considered for camshafts with increased duration
#
The VVT system on the intake camshaft changes the cam timing continuously (and so the lift at TDC):
-
1st intake valve: 120° (disengaged)
-
2nd intake valve: 124° (disengaged)
-
1st exhaust valve: 118° (no VVT)
-
2nd exhaust valve: 114° (no VVT)