1700204
tarmac rally - race
Ferrari 251 365 GTB/4 (352hp)
V-12cyl 4.4L 24v DOHC (DT/DT)
intake
exhaust
camshaft data:
lash ramp
: 0.20mm
0.20mm
duration @ 0.1mm
: 298°
290°
duration @ 1.0mm
: 260°
252°
valve lift
: 12.50mm
12.00mm
cam lift
:
lobe angle
: 100°
100°
timing @ 1.0mm
: 30° / 50°
46° / 26°
valve lift @ TDC
: 5.10mm
4.55mm
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
: not available
: not available
lower retainer
: not available
: not available
exterior spring
: not available
: not available
interior spring
fitted load / length
: 0kg @ 0.0mm
: 0kg @ 0.0mm
max. load / lift
: 0kg @ 0.0mm
: 0kg @ 0.0mm
REMARKS :
#
original valve spring info is not available
#
valve spring kit can be developed on request
REMARKS :
#
- steel billet camshafts
- camshafts driven by meshed gears GTB-4_engine.gif
- spline drive on both exhaust cams for distributors GTB-4_1.gifGTB-4_2.gifGTB-4_3.gif
#
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