DSPORT Magazine technical showcase editorial on EVO 4G63 camshaft options

MANUFACTURER: HKS Power
ENGINE MODEL: 4G63 EVO 8
CAMSHAFT PN# (INTAKE): 2202-AM003
CAMSHAFT PN# (EXHAUST): 22002-AM004
SPEC CARD# (INTAKE): N/A
SPEC CARD# (EXHAUST): N/A

INTAKE EXHAUST
CAM TIMING EVENTS
Centerline 110° 110°
Valve Opening @ 1.0mm 7.3° ATDC 38.9° BBDC
Valve Opening @ 0.050″ 10.6° ATDC 35.6° BBDC
Valve Closing @ 1.0mm 39.4° ABDC 7.3° BTDC
Valve Closing @ 0.050″ 35.8° ABDC 10.9° BTDC
DURATION
Actual Duration @ 1.0mm 212.1° 211.6°
Actual Duration @ 0.050″ 205.1° 204.7°
Claimed Duration @ 1.0mm 214.0° 214.0°
PEAK LIFT
Peak Valve Lift 10.8mm (0.425″) 10.2mm (0.401″)
Peak Cam Lift 6.2mm (0.245″) 5.9mm (0.232″)

Manufacturer’s Pitch

HKS high performance camshafts are CAD designed to optimize torque and horsepower over the widest possible power band. By manufacturing all camshafts from new cores, HKS is able to produce camshafts that equal or exceed the quality of the OEM units they are designed to replace. HKS camshafts are direct replacements and are designed to be compatible with the factory valve train components.

INFO

Since its inception, this 272-degree camshaft set from HKS set the bar for almost all aftermarket EVO 8 camshafts. A peak power increase on the order of nearly 20 percent meant that significant power gains could be had with a simple camshaft swap. A relatively mild lift meant that the HKS 272s maintained a smooth idle with little noticeable lope. Although the HKS 272s made less power than the factory units from 3,000 to 4,000 RPM, the power increases dramatically from 4,500 RPM to redline. Valve spring upgrade is not required by HKS, but we recommend it.


RUNDOWN

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

538.25 WHP @ 8,300 RPM
403.51 LB-FT @ 5,700 RPM

Peak power checked in at 8,300 RPM, as the power curve flattened out from 7,000 to 8,500 RPM. Peak boost was reached at roughly 4,900 RPM. The torque curve remains flat from 4,500 to 7,000 RPM and then drops off noticeably on the top end. Maximum torque of just over 400 lb-ft was reached at 5,700 RPM. Highest VE values were recorded at 6,500 RPM, cresting the 100.0 mark. Superior VE values over factory were recorded throughout the RPM range except for a slight drop at 3,500 RPM.

HORSEPOWER

RPM/WHP FACTORY HKS 272 GAIN/(LOSS)
2500 49.66 51.04 1.38
3000 82.45 68.89 (13.56)
3500 112.31 106.32 (5.99)
4000 166.27 158.63 (7.64)
4500 281.42 297.03 15.61
5000 323.28 355.60 32.32
5500 371.95 408.86 36.91
6000 399.03 455.70 56.67
6500 415.72 482.53 66.81
7000 451.50 505.11 53.61
7500 N/A 516.21 N/A
8000 N/A 513.62 N/A
8500 N/A 519.99 N/A

VOLUMETRIC EFFICIENCY

RPM/% FACTORY VE HKS 272
2500 80.5 88.7
3000 88.2 95.3
3500 98.6 96.4
4000 85.9 97.0
4500 85.0 96.8
5000 89.1 96.8
5500 92.1 97.8
6000 88.7 99.0
6500 88.8 100.0
7000 84.9 97.3
7500 N/A 92.1
8000 N/A 90.1
8500 N/A 84.2
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