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Kelford camshafts, Mitsubishi 4G63 Evo 8, hydraulic lifters (2003-2005)
803,00 €
Kelford camshafts for the Mitsubishi 4G63 Evo 8, hydraulic lifters engine. Choose a profile to suit your engine parts and intended use. Profile specifications and required modifications are detailed below.
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Kelford is a New Zealand camshaft manufacturer with roots in Christchurch dating back to 1968. Its profiles range from upgrades for street-driven cars to fully built race engines. Choose the cam around the rest of the engine and its intended use, rather than simply picking the longest duration.
This selection is for the Mitsubishi 4G63 Evo 8, hydraulic lifters engine. Profile differences, spring recommendations and required modifications are detailed below.
Technical specifications – available profiles for this engine
Profile 8-TX258
For a street 4G63 with the stock turbo or a 48–54 mm upgrade. Adds low- and mid-range pull with responsive throttle behaviour. Also suitable for restrictor-equipped rally engines. KVS63-BTK springs are recommended for up to 8,000 rpm and 25 psi.
| Specification | Intake | Exhaust |
|---|---|---|
| Cam lift | 6.07mm | 6.07mm |
| Rocker ratio | 1.73 | 1.73 |
| Net valve lift | 10.50mm | 10.50mm |
| Advertised duration @ 0.10mm | 258° | 264° |
| Duration @ 1.00mm valve lift | 208° | 220° |
| Timing IVO @ 1.00mm valve lift | 3 ATDC | – |
| Timing IVC @ 1.00mm valve lift | 31 ABDC | – |
| Timing EVO @ 1.00mm valve lift | – | 41 BBDC |
| Timing EVC @ 1.00mm valve lift | – | 1 BTDC |
| Suggested centre lines | 107° | 111° |
| Valve lift at TDC | 0.81mm | 0.96 mm |
Manufacturer profile information
Profile 8-TX268
For approximately 350–600 hp street, circuit or drag engines with a 48–58 mm turbo. Adds mid-range pull while retaining good throttle response. Suitable for E85 and similar ethanol blends. KVS63-BTK springs are recommended for up to 8,000 rpm and 35 psi.
| Specification | Intake | Exhaust |
|---|---|---|
| Cam lift | 6.36mm | 6.07mm |
| Rocker ratio | 1.73 | 1.73 |
| Net valve lift | 11.00mm | 10.50mm |
| Advertised duration @ 0.10mm | 264° | 268° |
| Duration @ 1.00mm valve lift | 216° | 220° |
| Timing IVO @ 1.00mm valve lift | 1 BTDC | – |
| Timing IVC @ 1.00mm valve lift | 35 ABDC | – |
| Timing EVO @ 1.00mm valve lift | – | 43 BBDC |
| Timing EVC @ 1.00mm valve lift | – | 3 BTDC |
| Suggested centre lines | 107° | 113° |
| Valve lift at TDC | 1.10mm | 0.84 mm |
Manufacturer profile information
Profile 8-TX272
Versatile race profile for a 4G63 making around 400–650 hp with a 54–62 mm turbo. KVS63-BTK springs are recommended up to 8500 rpm and 35 psi boost.
| Specification | Intake | Exhaust |
|---|---|---|
| Cam lift | 6.36mm | 6.36mm |
| Rocker ratio | 1.73 | 1.73 |
| Net valve lift | 11.00mm | 11.00mm |
| Advertised duration @ 0.10mm | 272° | 272° |
| Duration @ 1.00mm valve lift | 226° | 226° |
| Timing IVO @ 1.00mm valve lift | 6 BTDC | – |
| Timing IVC @ 1.00mm valve lift | 40 ABDC | – |
| Timing EVO @ 1.00mm valve lift | – | 46 BBDC |
| Timing EVC @ 1.00mm valve lift | – | 0 TDC |
| Suggested centre lines | 107° | 113° |
| Valve lift at TDC | 1.52mm | 1.00 mm |
Manufacturer profile information
Profile 8-TX272-L
Lower lift allows standard springs to be retained. Suitable for a 48–58 mm turbo, adding mid-range and top-end pull. An upgraded exhaust makes the rougher idle more noticeable. KVS63-BTK springs are recommended for high-mileage engines.
| Specification | Intake | Exhaust |
|---|---|---|
| Cam lift | 5.78mm | 5.78mm |
| Rocker ratio | 1.73 | 1.73 |
| Net valve lift | 10.00mm | 10.00mm |
| Advertised duration @ 0.10mm | 272° | 272° |
| Duration @ 1.00mm valve lift | 226° | 226° |
| Timing IVO @ 1.00mm valve lift | 6 BTDC | – |
| Timing IVC @ 1.00mm valve lift | 40 ABDC | – |
| Timing EVO @ 1.00mm valve lift | – | 48 BBDC |
| Timing EVC @ 1.00mm valve lift | – | 2 BTDC |
| Suggested centre lines | 107° | 115° |
| Valve lift at TDC | 1.83mm | 1.12 mm |
Manufacturer profile information
Profile 8-TX272R
A higher-lift profile for approximately 450–700 hp with a 54–68 mm turbo and high-rpm use. Suitable for E85 and similar ethanol blends. KVS63-BTK springs are recommended for up to 9,500 rpm and 40 psi.
| Specification | Intake | Exhaust |
|---|---|---|
| Cam lift | 6.79mm | 6.79mm |
| Rocker ratio | 1.73 | 1.73 |
| Net valve lift | 11.75mm | 11.75mm |
| Advertised duration @ 0.10mm | 272° | 272° |
| Duration @ 1.00mm valve lift | 232° | 232° |
| Timing IVO @ 1.00mm valve lift | 9 BTDC | – |
| Timing IVC @ 1.00mm valve lift | 43 ABDC | – |
| Timing EVO @ 1.00mm valve lift | – | 49 BBDC |
| Timing EVC @ 1.00mm valve lift | – | 3 ATDC |
| Suggested centre lines | 107° | 113° |
| Valve lift at TDC | 1.83mm | 1.07 mm |
Manufacturer profile information
Profile 8-TX280R
For a built 4G63 in time attack or drag racing with a 64 mm or larger turbo. Suitable for E85 and similar ethanol blends. KVS63-BTK springs are recommended for up to 9,000 rpm and 40 psi.
| Specification | Intake | Exhaust |
|---|---|---|
| Cam lift | 6.65mm | 6.65mm |
| Rocker ratio | 1.73 | 1.73 |
| Net valve lift | 11.50mm | 11.50mm |
| Advertised duration @ 0.10mm | 280° | 288° |
| Duration @ 1.00mm valve lift | 238° | 242° |
| Timing IVO @ 1.00mm valve lift | 12 BTDC | – |
| Timing IVC @ 1.00mm valve lift | 46 ABDC | – |
| Timing EVO @ 1.00mm valve lift | – | 57 BBDC |
| Timing EVC @ 1.00mm valve lift | – | 5 ATDC |
| Suggested centre lines | 107° | 116° |
| Valve lift at TDC | 2.09mm | 1.29 mm |
Manufacturer profile information
Profile 8-TX288R
For a built 4G63 racing engine with a 68 mm or larger turbo. Suitable for E85 and similar ethanol blends. Recommended springs: KVS63-EXTREME.
| Specification | Intake | Exhaust |
|---|---|---|
| Cam lift | 6.94mm | 6.94mm |
| Rocker ratio | 1.73 | 1.73 |
| Net valve lift | 12.00mm | 12.00mm |
| Advertised duration @ 0.10mm | 288° | 292° |
| Duration @ 1.00mm valve lift | 242° | 244° |
| Timing IVO @ 1.00mm valve lift | 13 BTDC | – |
| Timing IVC @ 1.00mm valve lift | 49 ABDC | – |
| Timing EVO @ 1.00mm valve lift | – | 60 BBDC |
| Timing EVC @ 1.00mm valve lift | – | 4 ATDC |
| Suggested centre lines | 108° | 118° |
| Valve lift at TDC | 2.06mm | 1.21 mm |
Manufacturer profile information
Profile 8-TX294
A high-boost, high-rpm drag profile for a 76 mm or larger turbo. Intended for ethanol blends or methanol. Recommended springs: KVS63-EXTREME.
| Specification | Intake | Exhaust |
|---|---|---|
| Cam lift | 6.94mm | 6.94mm |
| Rocker ratio | 1.73 | 1.73 |
| Net valve lift | 12.00mm | 12.00mm |
| Advertised duration @ 0.10mm | 294° | 300° |
| Duration @ 1.00mm valve lift | 250° | 256° |
| Timing IVO @ 1.00mm valve lift | 15 BTDC | – |
| Timing IVC @ 1.00mm valve lift | 55 ABDC | – |
| Timing EVO @ 1.00mm valve lift | – | 66 BBDC |
| Timing EVC @ 1.00mm valve lift | – | 10 ATDC |
| Suggested centre lines | 110° | 118° |
| Valve lift at TDC | 2.39mm | 1.88 mm |
Manufacturer profile information
Checking heights are shown with the duration figures. Net lift is the net valve movement specified by the manufacturer, while cam lift is listed separately. IVO/IVC denote intake valve opening/closing and EVO/EVC exhaust valve opening/closing. BTDC/ATDC mean before/after top dead centre, and BBDC/ABDC before/after bottom dead centre.
Installation and profile selection
Confirm the exact engine version, valvetrain design and the modifications required by the profile. Check cam timing and valve-to-piston clearance during installation. Springs, lifters and other supporting parts mentioned with a profile are not included unless the profile explicitly states that they come with the kit.
Examples of related vehicle applications
- Mitsubishi Lancer Evolution 8, 4G63 (2003–2005)
The list covers versions with the specified engines only. Exact fitment and required modifications depend on the selected profile, cylinder head, lifters and timing system.
| Weight | 10 kg |
|---|---|
| Brand |
