DSPORT Magazine technical showcase editorial on EVO 4G63 camshaft options

MANUFACTURER: Comp Cams
ENGINE MODEL: 4G63 EVO 8
CAMSHAFT PN# (INTAKE): 119-201-8I
CAMSHAFT PN# (EXHAUST): 119-202-8E
SPEC CARD# (INTAKE): VG3066-09
SPEC CARD# (EXHAUST): VI9342-10

INTAKE EXHAUST
CAM TIMING EVENTS
Centerline 104° 112°
Valve Opening @ 1.0mm 1.8° ATDC 42.0° BBDC
Valve Opening @ 0.050″ 5.1° ATDC 38.7° BBDC
Valve Closing @ 1.0mm 34.6° ABDC 9.9° BTDC
Valve Closing @ 0.050″ 31.1° ABDC 13.3° BTDC
DURATION
Actual Duration @ 1.0mm 212.8° 212.1°
Actual Duration @ 0.050″ 206.0° 205.3°
Claimed Duration @ 1.0mm 210.0° 210.0°
PEAK LIFT
Peak Valve Lift 11.2mm (0.441″) 10.5mm (0.413″)
Peak Cam Lift 6.5mm (0.255″) 6.1mm (0.239″)

Manufacturer’s Pitch

272+, Works well on engines with upgraded turbos generating higher boost levels and features increased mid to upper RPM power.

showcase-4g63-evo-cams-03-comp-272-0001

INFO

A power increase of nearly 90 horsepower can be realized with the Comp 272+ (256/257) camshaft set. While these camshafts delivered more power at the expense of a noticeably lopier idle, the additional 20 percent power at the peak means that significant gains can be realized with the Comp 272+ cams. While the Comp 272+ cams saw minimal power losses when compared to the 264+ cams under 4,500 RPM, the power bump from 5,000 RPM to redline demonstrated a strong powerband of the 272+ cams.


RUNDOWN

DSPORT Magazine technical showcase editorial on EVO 4G63 camshaft optionsDSPORT Magazine technical showcase editorial on EVO 4G63 camshaft options

541.34 WHP @ 7,900 RPM
409.63 LB-FT @ 6,100 RPM

Peak power checked in at 7,900 RPM, while the power curve stayed flat from 7,600 RPM all the way up to the 8,500 RPM redline. Peak boost was reached at roughly 4,600 RPM. A flat torque curve from 5,000 to 6,250 RPM reaches a maximum just shy of 410 lb-ft at 6,100 RPM. The highest VE values of 99.9 were recorded at 6,500 RPM, and almost all the way from idle to redline (save for 3,500 RPM), Comp 272+ VE values topped the factory VE by a noticeable amount.

HORSEPOWER

RPM/WHP FACTORY COMP 272+ GAIN/(LOSS)
2500 49.66 57.70 8.04
3000 82.45 71.21 (11.24)
3500 112.31 109.49 (2.82)
4000 166.27 162.78 (3.49)
4500 281.42 301.67 20.25
5000 323.28 357.06 33.78
5500 371.95 412.55 40.60
6000 399.03 461.48 62.45
6500 415.72 482.19 66.47
7000 451.50 521.51 70.01
7500 N/A 511.37 N/A
8000 N/A 527.24 N/A
8500 N/A 515.9 N/A

VOLUMETRIC EFFICIENCY

RPM/% FACTORY VE COMP 264+
2500 80.5 89.4
3000 88.2 95.2
3500 98.6 96.3
4000 85.9 97.0
4500 85.0 97.0
5000 89.1 96.8
5500 92.1 97.8
6000 88.7 99.0
6500 88.8 99.9
7000 84.9 96.9
7500 N/A 92.0
8000 N/A 90.1
8500 N/A 84.0
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