| SKU:
220-A
Kelford Performance Camshafts
Subaru STI 08-21 (EJ25 Dual AVCS)
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Description
Description
This range of Kelford Camshafts to suit the Subaru WRX STi EJ257B dual AVCS features the same successful lobe designs used on the earlier engines. The Dual AVCS on this engine is a great tool for the tuner to provide a greater operating range. The Kelford range of camshafts feature a unique camshaft design technology called “ICE” or Improved Combustion Efficiency. This “ICE” split duration design has in turn created a significant combustion efficiency gain for these engines. No other aftermarket camshaft company offers this unique technology.
Please note that the correct valve spring selection will depend on the installed height in your particular cylinder heads. Please contact us to discuss the correct valve spring selection.
In addition to our catalogue range, we can manufacture custom cams to your specifications, or design a profile to suit your specific application.
Camshaft Profiles - Click "Specifications" Tab for profile data:
220-A:
- 256&252/260 Degrees advertised duration. 9.55mm&9.55mm/9.50mm lift.
- High torque cams to suit near stock engines. Ideal in 36mm restrictor classes.
220-B:
- 264&260/260 Degrees advertised duration. 10.70mm&10.20mm/10.20mm lift.
- Race and rally cams with high lift and low duration for great throttle response.
220-C:
- 272&268/268 Degrees advertised duration. 11.30mm&10.50mm/10.50mm lift.
- High lift 272 degree racing cams to suit well built competition engines. These cams work particularly well with E85 fuel. Requires cylinder head modification to fit.
220-D:
- 282&278/278 Degrees advertised duration. 11.50mm&11.00mm/11.00mm lift.
- High lift 282 degree racing cams to suit well built competition engines with larger intake manifolds. These cams work particularly well with E85 fuel. Requires cylinder head modification to fit.
220-E:
- 292&288/294 Degrees advertised duration. 11.00mm&11.00mm/11.00mm lift.
- 290 degree camshafts to suit high boost, high rpm Drag racing engines. Must be run with fixed timing, not suitable in variable situations.
Technical Specifications
Technical Specifications
220-A
| Engine Make: | Engine Model: | Part Number: | |||||
| SUBARU | EJ257B | 220-A | |||||
| Valve Clearance: | Intake: | 0.20mm | Set | COLD | at the | CAM | |
| Exhaust: | 0.25mm | Set | COLD | at the | CAM | ||
| Cam Lift: | Intake: | 9.75mm | Exhaust: | 9.75mm | |||
| Rocker Ratio: | Intake: | 1 | Exhaust: | 1 | |||
| Nett Valve Lift: | Intake: | 9.55mm | Exhaust: | 9.50mm | |||
| Advertised Duration @ | 0.25mm | Intake: | 256 | Exhaust: | 260 | ||
| Duration @ | 1.00mm VALVE LIFT | Intake: | 218 | Exhaust: | 222 | ||
| Timing @ | 1.00mm VALVE LIFT | IVO: | 21 ATDC | EVO: | 57 BBDC | ||
| IVC: | 59 ABDC | EVC: | 15 BTDC | ||||
| Suggested Centre Lines: | Intake: | 130 | Exhaust: | 126 | |||
| VALVE | Lift @ TDC | Intake: | Exhaust: | ||||
220-B
| Engine Make: | Engine Model: | Part Number: | |||||
| SUBARU | EJ257B | 220-B | |||||
| Valve Clearance: | Intake: | 0.20mm | Set | COLD | at the | CAM | |
| Exhaust: | 0.25mm | Set | COLD | at the | CAM | ||
| Cam Lift: | Intake: | 10.90mm | Exhaust: | 10.45mm | |||
| Rocker Ratio: | Intake: | 1 | Exhaust: | 1 | |||
| Nett Valve Lift: | Intake: | 10.70mm | Exhaust: | 10.20mm | |||
| Advertised Duration @ | 0.25mm | Intake: | 264 | Exhaust: | 260 | ||
| Duration @ | 1.00mm VALVE LIFT | Intake: | 225 | Exhaust: | 222 | ||
| Timing @ | 1.00mm VALVE LIFT | IVO: | 17.5 ATDC | EVO: | 57 BBDC | ||
| IVC: | 62.5 ABDC | EVC: | 15 BTDC | ||||
| Suggested Centre Lines: | Intake: | 130 | Exhaust: | 126 | |||
| VALVE | Lift @ TDC | Intake: | 0.03mm | Exhaust: | 0.07mm | ||
220-C
| Engine Make: | Engine Model: | Part Number: | |||||
| SUBARU | EJ257B | 220-C | |||||
| Valve Clearance: | Intake: | 0.20mm | Set | COLD | at the | CAM | |
| Exhaust: | 0.25mm | Set | COLD | at the | CAM | ||
| Cam Lift: | Intake: | 11.50mm | Exhaust: | 10.75mm | |||
| Rocker Ratio: | Intake: | 1 | Exhaust: | 1 | |||
| Nett Valve Lift: | Intake: | 11.30mm | Exhaust: | 10.50mm | |||
| Advertised Duration @ | 0.25mm | Intake: | 272 | Exhaust: | 268 | ||
| Duration @ | 1.00mm VALVE LIFT | Intake: | 232 | Exhaust: | 228 | ||
| Timing @ | 1.00mm VALVE LIFT | IVO: | 14 ATDC | EVO: | 60 BBDC | ||
| IVC: | 66 ABDC | EVC: | 12 BTDC | ||||
| Suggested Centre Lines: | Intake: | 130 | Exhaust: | 126 | |||
| VALVE | Lift @ TDC | Intake: | 0.12mm | Exhaust: | 0.24mm | ||
220-D
| Engine Make: | Engine Model: | Part Number: | |||||
| SUBARU | EJ257B | 220-D | |||||
| Valve Clearance: | Intake: | 0.20mm | Set | COLD | at the | CAM | |
| Exhaust: | 0.25mm | Set | COLD | at the | CAM | ||
| Cam Lift: | Intake: | 11.70mm | Exhaust: | 11.25mm | |||
| Rocker Ratio: | Intake: | 1 | Exhaust: | 1 | |||
| Nett Valve Lift: | Intake: | 11.50mm | Exhaust: | 11.00mm | |||
| Advertised Duration @ | 0.25mm | Intake: | 282 | Exhaust: | 278 | ||
| Duration @ | 1.00mm VALVE LIFT | Intake: | 240 | Exhaust: | 236 | ||
| Timing @ | 1.00mm VALVE LIFT | IVO: | 10 ATDC | EVO: | 64 BBDC | ||
| IVC: | 70 ABDC | EVC: | 8 BTDC | ||||
| Suggested Centre Lines: | Intake: | 130 | Exhaust: | 126 | |||
| VALVE | Lift @ TDC | Intake: | 0.25mm | Exhaust: | 0.43mm | ||
220-E
| Engine Make: | Engine Model: | Part Number: | |||||
| SUBARU | EJ257B | 220-E | |||||
| Valve Clearance: | Intake: | 0.20mm | Set | COLD | at the | CAM | |
| Exhaust: | 0.25mm | Set | COLD | at the | CAM | ||
| Cam Lift: | Intake: | 11.20mm | Exhaust: | 11.25mm | |||
| Rocker Ratio: | Intake: | 1 | Exhaust: | 1 | |||
| Nett Valve Lift: | Intake: | 11.00mm | Exhaust: | 11.00mm | |||
| Advertised Duration @ | 0.25mm | Intake: | 292 | Exhaust: | 294 | ||
| Duration @ | 1.00mm VALVE LIFT | Intake: | 250 | Exhaust: | 252 | ||
| Timing @ | 1.00mm VALVE LIFT | IVO: | 13 BTDC | EVO: | 64 BBDC | ||
| IVC: | 57 ABDC | EVC: | 8 ATDC | ||||
| Suggested Centre Lines: | Intake: | 112 | Exhaust: | 118 | |||
| VALVE | Lift @ TDC | Intake: | 2.42mm | Exhaust: | 1.85 | ||