DSPORT Magazine technical showcase editorial on EVO 4G63 camshaft options

MANUFACTURER: Comp Cams
ENGINE MODEL: 4G63 EVO 8
CAMSHAFT PN# (INTAKE): 119-101-8I
CAMSHAFT PN# (EXHAUST): 119-102-83
SPEC CARD# (INTAKE): WA8487-13
SPEC CARD# (EXHAUST): WA8488-13

INTAKE EXHAUST
CAM TIMING EVENTS
Centerline 104° 112°
Valve Opening @ 1.0mm 5.6° ATDC 37.9° BBDC
Valve Opening @ 0.050″ 9.0° ATDC 34.6° BBDC
Valve Closing @ 1.0mm 30.3° ABDC 14.0° BTDC
Valve Closing @ 0.050″ 26.8° ABDC 17.4° BTDC
DURATION
Actual Duration @ 1.0mm 204.7° 203.9°
Actual Duration @ 0.050″ 197.9° 197.2°
Claimed Duration @ 1.0mm 202.0° 202.0°
PEAK LIFT
Peak Valve Lift 11.2mm (0.441″) 10.5mm (0.42″)
Peak Cam Lift 6.5mm (0.255″) 6.1mm (0.238″)

Manufacturer’s Pitch

264+, Works best with stock engine and stock turbo. Responds well to bolt-ons and pulls strong throughout entire engine rpm range. Upgraded valve springs required.

INFO

For EVO 8 owners looking for a bump in power without compromising idle quality, the Comp 264+ (248/249) camshaft set does the job. Compared to the factory sticks, the Comp 264+ cams delivered over 60 more peak horsepower to the wheels. In addition, peak power rose from noticeably from 7,000 to 7,800 RPM. While there was a dip in power from 3,000 to 4,500 RPM, that loss was likely the result of the aftermarket intake manifold. With the increase in redline from 7,000 to 8,500 RPM, a valve spring upgrade is in order.


RUNDOWN

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

515.14 WHP @ 7,800 RPM
400.11 LB-FT @ 6,000 RPM

Peak power checked in at 7,800 RPM, with the power curve slowly dropping off past this point. Peak boost was reached at about 4,500 RPM, while a flat torque band from 4,500 to 7,000 RPM delivers a peak torque figure of just over 400 lb-ft of torque. Peak torque came in at 6,000 RPM. The highest VE values were recorded at 6,500 RPM. VE figures superior to the factory sticks spanned from 4,000 RPM and beyond.

HORSEPOWER

RPM/WHP FACTORY COMP 264+ GAIN/(LOSS)
2500 49.66 56.57 6.91
3000 82.45 70.44 (12.01)
3500 112.31 108.19 (4.12)
4000 166.27 162.50 (3.77)
4500 281.42 299.97 18.55
5000 323.28 349.51 26.23
5500 371.95 401.79 29.84
6000 399.03 454.37 55.34
6500 415.72 483.92 68.20
7000 451.50 496.30 44.80
7500 N/A 498.75 N/A
8000 N/A 503.02 N/A
8500 N/A 487.31 N/A

VOLUMETRIC EFFICIENCY

RPM/% FACTORY VE COMP 264+
2500 80.5 89.2
3000 88.2 95.3
3500 98.6 96.3
4000 85.9 97.0
4500 85.0 97.3
5000 89.1 96.8
5500 92.1 97.7
6000 88.7 99.0
6500 88.8 99.9
7000 84.9 96.8
7500 N/A 92.1
8000 N/A 90.0
8500 N/A 94.0
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