3701403
hot street - dirt track
Mazda BP-4W Solid cam followers
I-4cyl 1.8L 16v DOHC (DTs/DTs)
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intake
exhaust
camshaft data:
lash ramp
: 0.28mm
0.28mm
duration @ 0.1mm
: 274°
274°
duration @ 1.0mm
: 230°
230°
valve lift
: 9.95mm
9.95mm
cam lift
: 9.95mm
9.95mm
lobe angle
: 110°
110°
timing @ 1.0mm
: 5° / 45°
45° / 5°
valve lift @ TDC
: 1.85mm
1.85mm
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
: O.E.M.
: O.E.M.
interior spring
fitted load / length
: 18kg @ 39.3mm
: 18kg @ 39.3mm
max. load / lift
: 55kg @ 11.0mm
: 55kg @ 11.0mm
REMARKS :
#
valve locks and retainers are not interchangeable with parts of the earlier BP cylinder head with hydraulic cam followers
REMARKS :
#
Camshafts for use with OEM mechanical cam followers. Please check the following dimensions before ordering:
- short intake camshaft
- long exhaust camshaft, grooves in cam bearings, slot for distributor drive
- cam follower diameter: 30.0mm
- shim diameter: 27.0mm (between cam and cam follower)
#
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
#
stand alone ECU based on throttle position sensor advised