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Kelford camshafts, BMW B58 Gen 1
1 561,00 €
Kelford camshafts for the BMW B58 Gen 1 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 BMW B58 Gen 1 engine. Profile differences, spring recommendations and required modifications are detailed below.
Technical specifications – available profiles for this engine
Profile 257-A
Stage 1 for a B58 Gen 1 with upgraded intake, exhaust and turbo. Suggested range: approximately 550–750 hp with a 58–68 mm turbo. Retains Valvetronic and Dual VANOS for a broad powerband. Requires upgraded springs, KVS58-BT is recommended.
| Specification | Intake | Exhaust |
|---|---|---|
| Cam lift | 6.35mm | 6.08mm |
| Rocker ratio | 1.622 | 1.67 |
| Net valve lift | 10.30mm | 10.15mm |
| Advertised duration @ 0.10mm | 270° | 268° |
| Duration @ 1.00mm valve lift | 230° | 226° |
| Suggested centre lines | Variable / VVT | Variable / VVT |
Manufacturer profile information
Profile 257-B
Stage 2 for a built B58 Gen 1 making approximately 750–1,000 hp with a 62–72 mm turbo. Suitable for an aftermarket manifold. Valvetronic and Dual VANOS can be retained. With a separate throttle body, Valvetronic can be locked fully open. Requires upgraded springs, KVS58-BT is recommended.
| Specification | Intake | Exhaust |
|---|---|---|
| Cam lift | 6.38mm | 6.35mm |
| Net valve lift | 10.35mm | 10.60mm |
| Advertised duration @ 0.10mm | 285° | 280° |
| Duration @ 1.00mm valve lift | 240° | 240° |
| Rocker ratio | 1.622 | 1.67 |
| Suggested centre lines | Variable / VVT | Variable / VVT |
Manufacturer profile information
Profile 257-C
Stage 3 for a B58 Gen 1 drag engine making over 1,200 hp with a 72 mm or larger turbo at high boost. Intended for ethanol blends or methanol. Requires upgraded valve springs.
| Specification | Intake | Exhaust |
|---|---|---|
| Cam lift | 6.47mm | 6.47mm |
| Net valve lift | 10.50mm | 10.80mm |
| Advertised duration @ 0.10mm | 288° | 292° |
| Duration @ 1.00mm valve lift | 242° | 250° |
| Rocker ratio | 1.622 | 1.67 |
| Suggested centre lines | 112 ATDC | 120 BTDC |
| Timing IVO @ 1.00mm valve lift | 9 BTDC | – |
| Timing IVC @ 1.00mm valve lift | 53 ABDC | – |
| Timing EVO @ 1.00mm valve lift | – | 65 BBDC |
| Timing EVC @ 1.00mm valve lift | – | 5 ATDC |
| Valve lift at TDC | 1.90mm | 1.50 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.
These are examples of first-generation B58 applications. Kelford distinguishes Gen 1 and Gen 1.5 camshafts. The model and model year alone do not identify the correct version, so confirm the camshaft design before ordering.
Examples of related vehicle applications
- BMW M140i F20/F21, B58 (2016–2019)
- BMW M240i F22/F23, B58 (2016–2021)
- BMW 340i F30/F31/F34, B58 (2015–2020)
- BMW 440i F32/F33/F36, B58 (2016–2021)
- BMW 540i G30/G31, B58 (2017–2020)
- BMW 640i GT G32, B58 (2017–2020)
- BMW 740i G11/G12, B58 (2015–2019)
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 |
