3700618
hot street - dirt track
Mazda BP Hydraulic cam followers
I-4cyl 1.8L 16v DOHC (DTH/DTH)
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intake
exhaust
camshaft data:
lash ramp
: hydro
hydro
duration @ 0.1mm
: 266°
266°
duration @ 1.0mm
: 231°
231°
valve lift
: 10.50mm
10.50mm
cam lift
:
lobe angle
: 108°
108°
timing @ 1.0mm
: 7° / 44°
43° / 8°
valve lift @ TDC
: 1.75mm
1.85mm
parts setup:
cam wheels :
: View CTMA023
: View CTMA023
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 99417/s
: View 99417/s
lower retainer
: O.E.M.
: O.E.M.
exterior spring
: View PAC-S90019
: View PAC-S90019
interior spring
fitted load / length
: 33kg @ 35.0mm
: 33kg @ 35.0mm
max. load / lift
: 82kg @ 12.5mm
: 82kg @ 12.5mm
REMARKS :
#
valve locks and retainer are not interchangeable with the parts of BP engines with original mechanical followers.
REMARKS :
#
camshafts for use in 1840cc BP engines with originally hydraulic cam followers (30mm):
- short intake camshaft
- long exhaust camshaft, grooves in cam bearings, slot for distributor drive
#
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 dirt track applications and pro street use with adjustable engine management or carburettors