DURATION
(°)
LIFT
(mm)
IN/
EX
PART No.
EACH SET
        MSRP $290.00 MSRP $580.00
EVO 7/8 272 10.70 IN TA301D-MT01A TA301B-MT01A
10.20 EX TA301F-MT01A
282 11.50 IN TA301D-MT01C TA301B-MT01C
EX TA301F-MT01C
EVO 9 272 10.70 IN TA301D-MT01B TA301B-MT01B
10.20 EX TA301F-MT01B
282 11.50 IN TA301D-MT01D TA301B-MT01D
EX TA301F-MT01D
REAL TIME INVENTORY→
Application :
MITSUBISHI 4G63 LANCER EVOLUTION 7/8/9
 
TA301B-MT01A@CAMSHAFT SET PONCAM 4G63 EVO7-8 272-10.70/10.20
TA301B-MT01D@CAMSHAFT SET PROCAM 4G63 EVO9 282-11.50
4G63 EVO7-8 IN
4G63 EVO9 IN
4G63 EVO7/8  EX
4G63 EVO9  EX
 
  DURATION
(°)
LIFT
(mm)
IN/
EX
PART No.
EACH SET
        MSRP $290.00 MSRP $580.00
EVO 7/8 272 10.70 IN TA301D-MT01A TA301B-MT01A
10.20 EX TA301F-MT01A
EVO 9 272 10.70 IN TA301D-MT01B TA301B-MT01B
10.20 EX TA301F-MT01B
REAL TIME INVENTORY→
 
  DURATION
(°)
LIFT
(mm)
IN/
EX
PART No.
EACH SET
        MSRP $290.00 MSRP $580.00
EVO 7/8 282 11.50 IN TA301D-MT01C TA301B-MT01C
EX TA301F-MT01C
EVO 9 282 11.50 IN TA301D-MT01D TA301B-MT01D
EX TA301F-MT01D
REAL TIME INVENTORY→
 
 
 
 ‘Optimized 'velocity' and 'acceleration'.
 ‘Designed for high power setups.
 ‘Optimizes engine performance.
 ‘Higher lift than other profiles of the duration.
 ‘Reduced stress/wear on the valve train.
 
The VALC profile allows the valves to open faster and for longer. This translates to faster lift and increased area under the 'lift curve' (see fig. ‡@)
which in turn generates more power. (Greater area under the 'lift curve' = greater air intake)  
‡@    
 
ECAM ACCELERATIONFLOW
ELIFTFLOW
EAIR INTAKEFLOW
  ECAM ACCELERATIONFHIGH
ELIFTFHIGH
EAIR INTAKEFHIGH
Unlike the valve opening, the VALC profile ensures that the valves close at a slower rate, helping to prevent common valve train related issues.
With a conventional direct-acting valve train, the maximum lift is usually determined by the size/diameter of the valve lifter. Selecting a high-lift camshaft without taking this into consideration often results in the camshaft lobes travelling beyond the surface of the valve lifter. This causes the lobe to make contact with the edge of the lifter, damaging both components over time. isee fig. ‡Aj
Therefore, the ideal performance orientated high-lift camshaft needs to have a profile that maximizes lobe travel on the lifter without exceeding the outer edge.

VALC profile camshafts have achieved this ideal by deliberately reducing the maximum cam velocity to limit lobe travel on the lifter surface.@iMaximum cam velocity = lobe travel distance on lifter)@
‡A
High lift profile without taking lifter size/radius into account.
Compared to standard profile camshafts of the same lift, VALC profile camshafts are able to then then off-set the difference for even greater lift/performance gains.
Conventional profile based on lifter size/radius.
'VALC' profile.
''VALC' profile + additional lift.
Lift comparison between a conventional profile and 'VALC' profile.
 Conventional profile
 'VALC' profile
 'VALC' profile + additional lift.
 
 
4G63 CAMSHAFT SPEC
EVO 7/8
 
TYPE HYDRAULIC HYDRAULIC
DURATION
(°)
272 282
IN/EX IN EX IN EX
CAM LIFT
(mm)
6.17 5.88 6.65 6.65
VALVE LIFT
(mm)
10.70 10.20 11.50 11.50
ROCKER ARM
RATIO
1.73 1.73 1.73 1.73
CENTER LINE
(°)
105 115 110 115
BASE CIRCLE
(Φ)
30 30 30 30
REQUIERED
VALVE SPRING
–1 –1 –3 –3
REQUIERED
VALVE LIFTER
OEM OEM OEM OEM
REQUIERED
CAM GEAR
–2 –2 –4 –4
 
EVO 9
 
TYPE HYDRAULIC HYDRAULIC
DURATION
(°)
272 282
IN/EX IN EX IN EX
CAM LIFT
(mm)
6.17 5.88 6.65 6.65
VALVE LIFT
(mm)
10.70 10.20 11.50 11.50
ROCKER ARM
RATIO
1.73 1.73 1.73 1.73
CENTER LINE
(°)
130 110 130 110
BASE CIRCLE
(Φ)
30 30 30 30
REQUIERED
VALVE SPRING
–1 –1 –3 –3
REQUIERED
VALVE LIFTER
OEM OEM OEM OEM
REQUIERED
CAM GEAR
OEM –2 OEM –4
–1 OEM or TA304A-MT01A
   EVO7 OEM Retainers are required when using TOMEI valve Springs on the EVO 8/9 models.
–2 OEM or TA302A-MT01B
–3 TA304A-MT01A
   EVO7 OEM Retainers are required when using TOMEI valve Springs on the EVO 8/9 models.
–4 TA302A-MT01B