Kelford nokka-akselit, Mazda MZR 2.0 LF-VE VVT (2002-2015)

Kelford camshafts, Mazda MZR 2.0 LF-VE VVT (2002-2015)

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Kelford camshafts for the Mazda MZR 2.0 LF-VE VVT engine. Choose a profile to suit your engine parts and intended use. Profile specifications and required modifications are detailed below.

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SKU: 211 Category: Camshafts

Description
Additional information

Kelford camshafts, Mazda MZR 2.0 LF-VE VVT

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 Mazda MZR 2.0 LF-VE VVT engine. Profile differences, spring recommendations and required modifications are detailed below.

Technical specifications – available profiles for this engine

Profile 211-B

A Stage 1 profile for a near-standard naturally aspirated LF-VE. Adds mid-range pull while keeping responsive throttle behaviour. Compatible with standard valve springs, although Kelford recommends KVS17 springs for high-mileage engines.

Specification	Intake	Exhaust
Valve clearance	0.25mm cold at the cam	0.30mm cold at the cam
Cam lift	10.05mm	8.80mm
Rocker ratio	1	1
Net valve lift	9.80mm	8.50mm
Advertised duration @ 0.10mm	260°	242°
Duration @ 1.00mm valve lift	221°	210°
Timing EVO @ 1.00mm valve lift	–	33 BBDC
Timing EVC @ 1.00mm valve lift	–	3 BTDC
Suggested centre lines	Vari	108°
Valve lift at TDC	–	0.73 mm

Manufacturer profile information

Profile 211-C

For a naturally aspirated engine built for rallying, circuit racing or hillclimbs. Recommended compression is at least 11:1, with an aftermarket intake manifold or individual throttle bodies. The recommended spring and retainer upgrade is KVS17X-T.

Specification	Intake	Exhaust
Valve clearance	0.30mm cold at the cam	0.35mm cold at the cam
Cam lift	11.30mm	11.35mm
Rocker ratio	1	1
Net valve lift	11.00mm	11.00mm
Advertised duration @ 0.10mm	278°	272°
Duration @ 1.00mm valve lift	244°	238°
Timing IVO @ 1.00mm valve lift	16 BTDC	–
Timing IVC @ 1.00mm valve lift	48 ABDC	–
Timing EVO @ 1.00mm valve lift	–	49 BBDC
Timing EVC @ 1.00mm valve lift	–	9 ATDC
Suggested centre lines	106°	110°
Valve lift at TDC	2.70mm	2.10 mm

Manufacturer profile information

Profile 211-D

Longer duration for a fully built naturally aspirated engine, including drift or drag applications. Requires a ported head, free-flowing exhaust and individual throttle bodies. Recommended compression is at least 12.5:1. Kelford recommends the KVS17X-T spring and retainer kit.

Specification	Intake	Exhaust
Valve clearance	0.30mm cold at the cam	0.35mm cold at the cam
Cam lift	11.55mm	11.60mm
Rocker ratio	1	1
Net valve lift	11.25mm	11.25mm
Advertised duration	292°	282°
Duration @ 1.00mm valve lift	248°	242°
Timing IVO @ 1.00mm valve lift	18 BTDC	–
Timing IVC @ 1.00mm valve lift	50 ABDC	–
Timing EVO @ 1.00mm valve lift	–	51 BBDC
Timing EVC @ 1.00mm valve lift	–	11 ATDC
Suggested centre lines	106°	110°
Valve lift at TDC	2.90mm	2.10 mm

Manufacturer profile information

Profile 211-T

Stage 1 for a turbocharged MZR with a 48–54 mm turbo. Adds mid-range pull while keeping good throttle response. Standard springs can be used below 14 psi with the factory rev limit retained. KVS17-X springs are recommended for high-mileage engines or higher boost and rpm.

Specification	Intake	Exhaust
Valve clearance	0.25mm cold at the cam	0.30mm cold at the cam
Cam lift	10.05mm	10.10mm
Rocker ratio	1	1
Net valve lift	9.80mm	9.80mm
Advertised duration @ 0.10mm	264°	264°
Duration @ 1.00mm valve lift	224°	224°
Timing EVO @ 1.00mm valve lift	–	48 BBDC
Timing EVC @ 1.00mm valve lift	–	4 BTDC
Suggested centre lines	Vari	116°
Valve lift at TDC	–	0.66 mm

Manufacturer profile information

Profile 211-T2

Stage 2 for a turbocharged MZR making approximately 400–550+ hp with a 54–60 mm turbo. Focuses on mid-range and top-end power and works with E85. Recommended springs: KVS17-X.

Specification	Intake	Exhaust
Valve clearance	0.30mm cold at the cam	0.35mm cold at the cam
Cam lift	10.85mm	10.90mm
Rocker ratio	1	1
Net valve lift	10.55mm	10.55mm
Advertised duration @ 0.10mm	266°	276°
Duration @ 1.00mm valve lift	228°	236°
Timing EVO @ 1.00mm valve lift	–	54 BBDC
Timing EVC @ 1.00mm valve lift	–	2 ATDC
Suggested centre lines	Vari	116°
Valve lift at TDC	–	1.19 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

Mazda MX-5 NC 2.0 LF-VE (2005–2015)
Mazda 3 2.0 LF-VE (2003–2013)
Mazda 5 2.0 LF-VE (2005–2015)
Mazda 6 2.0 LF-VE (2002–2010)

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.

Kelford Cams