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Kelford camshafts, Nissan RB25DET NVCS (1993-1998)
1 078,00 €
Kelford camshafts for the Nissan RB25DET NVCS 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 Nissan RB25DET NVCS engine. Profile differences, spring recommendations and required modifications are detailed below.
Technical specifications – available profiles for this engine
Profile 246-A
Street and drift profile for a 54–62 mm turbo. Adds low and mid-range pull and improves spool. Retains NVCS without head machining for cam clearance. Stock springs suit up to 7500 rpm and 14 psi boost. KVS25R springs are recommended beyond this.
| Specification | Intake | Exhaust |
|---|---|---|
| Cam lift | 9.30mm | 9.30mm |
| Rocker ratio | 1 | 1 |
| Net valve lift | 9.30mm | 9.30mm |
| Advertised duration @ 0.10mm | 262° | 262° |
| Duration @ 1.00mm valve lift | 222° | 222° |
| Timing EVO @ 1.00mm valve lift | – | 45 BBDC |
| Timing EVC @ 1.00mm valve lift | – | 3 BTDC |
| Suggested centre lines | Variable / VVT | 114° |
| Valve lift at TDC | – | 0.81 mm |
Manufacturer profile information
Profile 246-A2
Street, drift or drag profile for a 58–68 mm turbo. Adds mid-range and top-end pull while NVCS retains throttle response. No head machining is required for cam clearance. Stock springs can be used up to 7500 rpm and 14 psi boost. Beyond this, KVS25R springs are recommended. Supplied with a spline/half-moon trigger as standard. Specify a yoke trigger when ordering if required.
| Specification | Intake | Exhaust |
|---|---|---|
| Cam lift | 9.30mm | 9.35mm |
| Rocker ratio | 1 | 1 |
| Net valve lift | 9.30mm | 9.35mm |
| Advertised duration @ 0.10mm | 262° | 272° |
| Duration @ 1.00mm valve lift | 222° | 226° |
| Timing EVO @ 1.00mm valve lift | – | 47 BBDC |
| Timing EVC @ 1.00mm valve lift | – | 1 BTDC |
| Suggested centre lines | Variable / VVT | 114° |
| Valve lift at TDC | – | 0.85 mm |
Manufacturer profile information
Profile 246-B
High-lift profile for a powerful street, drift or circuit car with a 64–76 mm turbo. Retains NVCS. The head must be machined for the larger lobes. Recommended springs: KVS25R.
| Specification | Intake | Exhaust |
|---|---|---|
| Cam lift | 10.00mm | 10.00mm |
| Rocker ratio | 1 | 1 |
| Net valve lift | 10.00mm | 10.00mm |
| Advertised duration @ 0.10mm | 264° | 272° |
| Duration @ 1.00mm valve lift | 226° | 232° |
| Timing EVO @ 1.00mm valve lift | – | 51 BBDC |
| Timing EVC @ 1.00mm valve lift | – | 1 BTDC |
| Suggested centre lines | Variable / VVT | 116° |
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
- Nissan Skyline R33 GTS25t RB25DET (1993–1998)
- Nissan Stagea WC34 RB25DET (1996–1998)
- Nissan Laurel C34/C35 RB25DET (1993–1998)
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 |
