2291020
hot street - dirt track
Ford ALDA ST170, VVT
I-4cyl 2.0L 16v DOHC (DTx/DTx)
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intake
exhaust
camshaft data:
lash ramp
: 0.25mm
0.25mm
duration @ 0.1mm
: 280°
272°
duration @ 1.0mm
: 246°
238°
valve lift
: 11.75mm
11.25mm
cam lift
: 11.75mm
11.25mm
lobe angle
: 145°
112°
timing @ 1.0mm
: -22° / 88°
51° / 7°
valve lift @ TDC
: 0.30mm
2.15mm
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
: 19kg @ 0.0mm
: 21kg @ 0.0mm
max. load / lift
: 50kg @ 12.0mm
: 50kg @ 10.5mm
REMARKS :
REMARKS :
#
--> intake camshaft for use with vvt system (like original intake)
--> The cam trigger will need to be transferred from oem camshaft
#
In the factory valve setup, the valve clearance is set by cam followers of individual lengths.
Cat Cams offers two options to adjust the valve clearance:
1/ camshafts with factory cam base diameter of 38.2mm: use O.E.M. tappets with appropriate inner stud length to adjust the clearance. It may be required to replace the cam followers to obtain the correct valve clearance.
2/ camshafts with reduced cam base diameter to 35.0mm: use lash caps (dia. 6mm) with appropriate thickness to adjust the clearance
-
-> Please indicate the cam base diameter when ordering.
#
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