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″) |
|
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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
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 |
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| 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 |
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| 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 | |