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Kelford camshafts, Nissan RB20DE/T / RB25DE/T, hydraulic lifters (1985-1998)
1 078,00 €
Kelford camshafts for the Nissan RB20DE/T / RB25DE/T, 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 Nissan RB20DE/T / RB25DE/T, hydraulic lifters engine. Profile differences, spring recommendations and required modifications are detailed below.
Technical specifications – available profiles for this engine
Profile H182-SC
High-lift split-lobe intake profile to improve head flow and top-end pull. Suits a 64–72 mm turbo in a powerful street, drift or circuit car. The head must be machined for cam clearance. Recommended springs: KVS20 for non-NVCS heads and KVS25R for NVCS heads.
| Specification | Intake | Exhaust |
|---|---|---|
| Cam lift | 10.00mm | 10.00mm |
| Rocker ratio | 1 | 1 |
| Net valve lift | 10.00mm | 10.00mm |
| Advertised duration @ 0.10mm | 272° | 272° |
| Duration @ 1.00mm valve lift | 232° | 232° |
| Timing IVO @ 1.00mm valve lift | 6 BTDC | – |
| Timing IVC @ 1.00mm valve lift | 46 ABDC | – |
| Timing EVO @ 1.00mm valve lift | – | 50 BBDC |
| Timing EVC @ 1.00mm valve lift | – | 2 ATDC |
| Suggested centre lines | 110° | 114° |
| Valve lift at TDC | 1.70mm | 1.20 mm |
Manufacturer profile information
Profile H182-SD
High-lift split-lobe intake profile to improve head flow and top-end pull. For turbos of at least 64 mm in drift, drag or high-rpm circuit builds. The head must be machined for cam clearance. Recommended springs: KVS20 for non-NVCS heads and KVS25R for NVCS heads.
| Specification | Intake | Exhaust |
|---|---|---|
| Cam lift | 10.00mm | 10.00mm |
| Rocker ratio | 1 | 1 |
| Net valve lift | 10.00mm | 10.00mm |
| Advertised duration @ 0.10mm | 278° | 278° |
| Duration @ 1.00mm valve lift | 238° | 238° |
| Timing IVO @ 1.00mm valve lift | 9 BTDC | – |
| Timing IVC @ 1.00mm valve lift | 49 ABDC | – |
| Timing EVO @ 1.00mm valve lift | – | 55 BBDC |
| Timing EVC @ 1.00mm valve lift | – | 3 ATDC |
| Suggested centre lines | 110° | 116° |
| Valve lift at TDC | 1.84mm | 1.31 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.
An NVCS head requires NVCS deletion. Not for the solid lifters in an RB25DET NEO head.
Examples of related vehicle applications
- Nissan Skyline R31/R32 RB20DE/RB20DET (1985–1994)
- Nissan Skyline R32 RB25DE (1991–1994)
- Nissan Cefiro A31 RB20DE/RB20DET (1988–1994)
- Nissan Laurel C33 RB20DE/RB20DET/RB25DE (1989–1993)
- Nissan Skyline R33 RB25DET (1993–1998), with NVCS deleted
- Nissan Stagea WC34 RB25DET (1996–1998), with NVCS deleted
- Nissan Laurel C34/C35 RB25DET (1993–1998), with NVCS deleted
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 |
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