# Nissan L engine

The Nissan L series of automobile engines was produced from 1966 through 1986 in both inline-four and inline-six configurations ranging from 1.3 L to 2.8 L. It is a two-valves per cylinder SOHC non-crossflow engine, with an iron block and an aluminium head. It was most notable as the engine of the Datsun 510, Datsun 240Z sports car, and the Nissan Maxima. These engines are known for their reliability, durability, and parts interchangeability.
The four-cylinder L series engines were replaced with the Z series and later the CA series, while the six-cylinder L series engines were replaced with the VG series and RB series.

## History

The L series started with the production of the six-cylinder L20 in 1966. This engine was rushed into production by Datsun and was designed prior to the Prince merger using the Mercedes overhead cam engine as a model. and was discontinued two years later.
Learning lessons from the first L20, the four-cylinder L16 was developed in 1967. The L16 four-cylinder design was influenced by the Mercedes-Benz M180 engine that the Prince Motor Company developed in four- and six-cylinder displacements called the Prince G engine. This engine was given a full design and development cycle in Nissan's Small Engine Division to prevent repeating the same mistakes made from the original L20 engine. With this new engine design, the L16 went through rigorous testing and proved to be a much more superior design over the original L20. This engine set the standard for later L series engines, with the original L20 being replaced by the L16-based L20A.

## Straight-four
### L13

The L13 was a 1,296 cc (1.3 L; 79.1 cu in) engine with a bore and stroke of 83 mm × 59.9 mm (3.27 in × 2.36 in) that appeared in 1967. It was not available in the United States, but Canada received it in 1968 only. It produces 77 hp (57 kW; 78 PS) SAE at 6,000 rpm (export models). In the Japanese market, the gross JIS rating was used and the figure is 72 PS (53 kW) JIS at the same engine speed. Torque is 109 N⋅m (80 lb⋅ft) SAE or 103 N⋅m (76 lb⋅ft) JIS at 3,600 rpm. The L13 was essentially a short-stroke L16.
Applications:
* Nissan Bluebird (510)

### L14

The 1,428 cc (1.4 L; 87.1 cu in) L14 was destined for most of the world, but was never offered in the US.
Specifications
Bore x stroke (83 mm × 66 mm (3.27 in × 2.60 in).
85 PS JIS (63 kW) at 6,000rpm, 116 N⋅m (85 lb⋅ft) at 3,600rpm (single carburetor)
95 PS JIS (70 kW) at 6,400rpm, 122 N⋅m (90 lb⋅ft) at 4,000rpm (twin SU carburetors)
* 1968–1973 Nissan Bluebird (510)
* Nissan Violet/140J (J710/J711)
* 1971–1973 Datsun Sunny Excellent (PB110)
* 1971–1973 Datsun Sunny Excellent - Coupé (KPB110) (April 1971)
* 1973–1976 Nissan Sunny Excellent (PB210)
* 1973-1974 Datsun 140Z (PB210) L14 with twin Dell'Orto carburetors and performance cam (South Africa special)
* 1975 Nissan GR-1 concept

### L16

The L16 is a 1,595 cc (1.6 L; 97.3 cu in) straight-four engine, typically fed by a 2-barrel Hitachi-SU carburettor, produced from 1967 through 1973 for the Nissan Bluebird, sold as the Datsun 510 in North America. It replaced the Prince G-16 in 1975. Bore and stroke were 83 mm × 73.7 mm (3.27 in × 2.90 in).
Learning lessons from the original L20, the L16 was given a full design and development cycle in Nissan's Small Engine Division. Influenced by the design of the Mercedes-Benz M180 engine that Prince Motor Company developed in four- and six-cylinder displacements called the Prince G engine, this resulted in a superior design that proved itself over time and served as the basis for the later L24 and L20A. It also serves as the basis of Nissan's "Modular L Series" lineup well into the 1980s.
In US trim, it produces 96 hp (72 kW; 97 PS) at 6,000 rpm and maximum torque of 135 N⋅m (100 lb⋅ft) at 3,600 rpm.
When this engine was installed in a 1972 Canadian 510 sedan model with manual transmission, two sets of points were installed in the distributor and this second set of points was in circuit only in third gear and under certain throttle-opening angles to obtain a different dwell angle. A similar arrangement exists in the US-spec 510/610 cars and 521/620 pickup trucks for the years 1970-1973.
Applications:
* 1967–1973 Nissan Bluebird (P510)
* 1968–1973 Datsun 510
* 1970–1972 Datsun 521 pick-up
* 1971–1977 Nissan 160B sedan (610)
* 1972–1973 Datsun 620 pick-up
* 1973–1977 Nissan Violet/Datsun 160J (P710/P711)
* 1977–1978 Nissan Violet/Auster/Stanza/160J (A10)

### L16S

The L16S was an engine that was used in the 910 Bluebird sedan and van/wagon. This engine was equipped with an electronically controlled carburetor.
Applications:
* Nissan Bluebird (910)

### L16T

The L16T was basically the same as the L16 but had twin SU carbs, flat top pistons (same as ones used in 240Z) and a slightly different head. It produces 109 PS (80 kW; 108 hp).
Applications:
* Nissan Bluebird (510) - At least in European version, where it was known as Datsun 1600SSS (P(L)510), 1968-1972.
* Nissan Violet SSS/Datsun 710 SSS/Datsun 160J SSS (P710/P711)1973–1977
* Datsun 160Z (B210), specific to the South African market where it was assembled.
* Nissan Skyline (C210), offered in the 1600TI model. Replaced by the Z16 in late 1978.
Note the L in PL was for left hand drive models.

### L16E

The L16E was fuel injected version of L16, components provided by Bosch. It was available only in Japan; in brochures it is rated 10 horsepower more than the L16T engine.
Applications:
* Nissan Bluebird SSS-E (610)1971–1976
* Nissan Violet SSS-E (P710/P711)1973–1977
* Nissan Stanza (A10/A11)1977–1981

### L16P

The L16P is the LPG version of the L16.
Applications:
* Nissan Bluebird (510)
* Nissan Violet (710)

### L18

The L18 was a 1,770 cc (1.8 L; 108.0 cu in) with a bore and stroke of 85 mm × 78 mm (3.35 in × 3.07 in) engine produced from 1972 through 1976. It produces 105 PS (77 kW; 104 hp) at 5,000 rpm in the most common trim. The L18 replaced the Prince G-18 in 1975. All variants used the same camshaft lobe lift. The L18 was a popular powerplant in many non-USA markets due to its under-2-liters displacement, which made it exempt from many fuel and classification tariffs.
* 1971-1976 Nissan Bluebird/Datsun 180B
* 1973 Nissan Bluebird/Datsun 1600 SSS (P510)
* 1973 Datsun 610
* 1974 Datsun 620 truck
* 1974 Datsun 710
* 1979–1981 Nissan Silvia/Datsun 180SX (S110)
* 1980–1986 Datsun 720 (Middle East)
* Datsun 810

### L18S

The L18S was an 1,800 cc (1.8 L; 109.8 cu in) engine that was used in the 910 bluebird Sedan and S10 Silvia.
Applications:
* 1979 Nissan Bluebird (910)
* 1975–1979 Nissan Silvia/Datsun 180SX (S10)

### L18E

The L18E was an 1,800 cc (1.8 L; 109.8 cu in) engine that was used in the S11 Silvia. The L18E is an upgraded version of the L18S, but with electronic fuel injection rather than a carburetor, that produces 115 PS (85 kW; 113 hp) at 6,200 rpm. The L18E was added in the S11 Silvia's 1976 upgrade for the "Type-LSE" trim level.
Applications:
* 1976–1979 Nissan Silvia/Datsun 180SX (S10)
* 1980–1983 Datsun 180SX (S110) (Europe)

### L18T

The L18T was basically the same as the L18 but had twin SU carbs, higher compression pistons, and lower volume combustion chambers. A high lift cam, 2 mm (0.079 in) bigger inlet valves and 1 mm (0.039 in) bigger exhaust valves were also fitted. It was installed into the 610-series Bluebird 180B SSS and UK market 910 Bluebird 1.8 GL coupé. It produces 110 PS (81 kW). Also used in the Bluebird SSS Hardtop Coupé (910) for General LHD markets.

### L18P

The L18P is the LPG version of the L18 engine; it was mainly installed in cars intended for taxi use.
Applications:
* Datsun Bluebird (810)
* Datsun Violet 710

### L20B

The L20B is a 1,952 cc (2.0 L; 119.1 cu in) with a bore and stroke of 85 mm × 86 mm (3.35 in × 3.39 in) engine produced from 1974 through 1985. In US spec, it produces 110 hp (82 kW) in 1974-75 form with 112 lb⋅ft (152 N⋅m) of torque as installed in the Datsun 610 and 97 hp (72 kW) in 1977-78 form with 102 lb⋅ft (138 N⋅m) of torque as installed in the 200SX. The L20B engine introduced larger-diameter 60 mm (2.4 in) main bearings while retaining a fully counterweighted crankshaft. The forged U60 crankshaft also ushered in the use of a six-bolt flywheel boss. The block introduced a taller deck height to accommodate the longer stroke and connecting rods. This specification would also be used later in the Z20 and Z22 engines. The bigger powerplant even helped spawn an important new offering from Datsun's competition department -50 mm (2.0 in) Solex twin-choke carburetor kits- complete fuel systems that help produce nearly double the power from the ubiquitous L20B. The legendary robustness and nearly square configuration have made this engine a popular choice among tuners for turbocharging.
The engine used a carburetor but switched to fuel injection (and round instead of square exhaust ports) in some non-USA markets in 1977. Carburetors were used in all US L20B applications for both cars and trucks. In the US, the L20B was used in six different model families -A10, 610, 710, S10, 620, and 720 models- making it the most versatile powerplant in the company's US history. To avoid confusion with the six-cylinder L20, Nissan designated this engine the L20B.
* 1974–1976 Datsun 610
* 1975–1977 Datsun 710
* 1975–1979 Datsun 620 110 hp (82 kW)
* 1975–1979 Datsun 200SX (S10)
* 1977–1981 Datsun 200B
* 1978–1981 Datsun 510 (HA10)
* 1979.5–1980 Datsun 720
* 1981-198? Nissan/Datsun Skyline R30 (South Africa)

### LZ (competition)

The "LZ" twin cam head was designed to give a power boost to the Datsun L series engine for competition purposes.
There are two different LZ cylinder heads. The early head is the same thickness as a normal L series head. The engine using the first head was referred to as the L14 twin cam. There was no mention of Z in the title. This L14 twin cam head engine has flat exit side exhaust ports, the early 12 bolt rocker cover and the coolant discharge on the inlet side of the head. All early twin cam engines appear to have the 14 bolt rocker cover (6 for the cover and 8 for the bolt-in plug holders). Later engines use the full flat cover with six bolts to secure it.
The LZ engine was built purely for Datsun/Nissan competition use. Engine size can vary between 1400 cc (LZ14) in the PB110 "1200", 1600 cc in the PB210, 1800 CC in the 710 2.0 litres in the PA10 Stanza, to 2.2 liter in the 910 bluebird rally cars. The naturally aspirated LZ engines used 44 or 50 mm (1.73 or 1.97 in) Solex carburettors depending on capacity. The LZ engine found its way into many categories, from "Datsun Works" rally cars, Formula Pacific, Group 4 (racing), Group 5 (racing) and Group C.
In some Japanese racing classes the LZ engine is fitted with low compression pistons and a "T05B" turbocharger. These engines are electronically fuel injected. A very successful example of the LZ turbo was in the famous Japanese "White Lightning" Silvia and "Tomica" R30 Skyline, both driven by Hoshino in the mid–1980s. The LZ turbo engine was also used in the 1986 Nissan March 85G Le Mans car.
The LZ turbo engine was tuned to produce 570 PS (419 kW; 562 hp) at 7,600 rpm and 539 N⋅m (398 lbf⋅ft) at 6,400 rpm. The original LZ20B turbo engine used in the 1983 Nissan Silvia (S12) "White Lightning" Group 5 race car, produced 500 PS (368 kW; 493 hp) at 8,000 rpm.
The LZ14 engine for the Formula Pacific race cars produces 205 PS (151 kW; 202 hp) at 10,200 rpm. For qualifying and non endurance events the LZ14 can be tweaked to produce 240 PS (177 kW; 237 hp) at 11,000 rpm. The LZ14 is naturally aspirated and has a bore and stroke of 87.8 mm × 66 mm (3.46 in × 2.60 in) 1,598 cc (1.6 L; 97.5 cu in).
The LZ engine uses a standard L series engine block to mount the DOHC cylinder head. Usually the bottom end is dry sumped using a Tsubakimoto dry sump pump. The crankshaft used is a Nismo chrome moly "8 bolt flywheel" type. Connecting rods are various length, Cosworth style, to suit the engine stroke. The rod caps have aircraft grade rod bolts and are dowelled. Pistons are thin ring forged units.
The head was available for purchase from Nissan (Nismo) and was sanctioned by the FIA. The LZ14 1,598 cc (1.6 L; 97.5 cu in) was used during the 1973 Japanese GP, taking the top three positions. In open wheeler "Formula Pacific" racing the LZ14 engine dominated competition in most events it was entered in. It received multiple top rankings in some events.

### LD20/LD20T

There was also a diesel version of the four-cylinder L-series, used in amongst others the Bluebird 910 and the Vanette. Strangely, it was not installed in the 720 pickup (which has the SD22/25 when diesel powered) although the gas versions most often has the L-series engine. However, in case of a conversion of a gas powered 720 to diesel, it will be much easier to use a LD20 because it fits on the original gearbox and engine mounts.) The N/A version produced 65 PS (48 kW) at 4600 rpm and 12.5 kg⋅m (123 N⋅m; 90 lb⋅ft) of torque at 2400 rpm, later 67 PS (49 kW) and 13 kg⋅m (127 N⋅m; 94 lb⋅ft) of torque. The turbo version has 79 PS (58 kW) at 4400 rpm and 17 kg⋅m (167 N⋅m; 123 lb⋅ft) of torque at 2400 rpm.

#### LD20

* 1,952 cc (2.0 L) diesel engine pre-combustion chamber
65 PS (48 kW; 64 hp) at 4600 rpm and 12.5 kg⋅m (123 N⋅m; 90 lb⋅ft) of torque at 2400 rpm
Models:
* Vanette (C120)
* Largo (GC120)

#### LD20 II

Introduced in 1986, the LD20 II has a differently shaped combustion chamber. Camshaft is driven by timing belt instead of chain drive as in LD20. 67 PS (49 kW; 66 hp) at 4600 rpm and 13 kg⋅m (127 N⋅m; 94 lb⋅ft) of torque at 2400 rpm
Models:
* Bluebird (910 and U11)
* Vanette (C22)
* Largo (GC22)
* Ebro/Nissan Trade

#### LD20T/LD20T II

79 PS (58 kW; 78 hp) at 4400 rpm and 17 kg⋅m (167 N⋅m; 123 lb⋅ft) of torque at 2400 rpm (LD20T II)
Models:
* Bluebird (U11)
* Largo (GC120 & GC22)
* Homy / Caravan (E23 & E24)

### OS Giken DOHC cylinder head (16-valve)

In 1974, Osamu Okazaki designed a dual overhead cam, 16-valve cylinder head as an upgrade to the four-cylinder variant of the L-series engines, and manufactured it through his automotive performance company, OS Giken. This cylinder head also significantly improved the performance of the engine by using a more modern crossflow cylinder head design, compared to the original which used a reverse flow design. A naturally aspirated version of this engine produced 230 hp (170 kW; 230 PS).

## Straight-six
### L20/L20A

The L20 is a SOHC 12-valve engine produced from 1966. A bore and stroke of 78 mm × 69.7 mm (3.07 in × 2.74 in) meant a displacement of 1,998 cc (2.0 L; 121.9 cu in). It was used in the Nissan Skyline 2000 GT and Nissan Cedric 130, producing 109 hp (81 kW) for the 2000 GT and 123 hp (92 kW) for the Cedric. This engine was plagued by problems caused by its rushed development and was short lived, with the engine being discontinued two years later.
A new L20, designated L20A, was introduced in 1970 to replace the original L20 and was based on the design of the L16. It used the same bore and stroke as the original L20 and produces 115 PS (85 kW). It was used in HLC210 (Nissan Laurel/Datsun 200L, 75-77), G610 Bluebird U 2000 GT and GTX, 230/330 Series Cedrics, HIJC31 (Laurel, 81-85), and Fairlady Z (1970–1983).
There was also the fuel injected L20E, which produced 130 PS (96 kW).

### L20ET

The L20ET is a turbo engine developed from the L20E. It is a 12-valve, six-cylinder, fuel-injected engine with a single chain driven cam, turbo (non intercooled), and a non crossflow head. It produces 145 PS (107 kW; 143 hp).
It was released in the late 1970s and fitted to the Skyline C210 and R30, Laurel, Leopard, Cedric, Gloria, and early Fairlady Z lines of automobiles.
This engine was the first engine out of Japan to ever receive a turbo.

### L20P

The L20P is the LPG version of the L20 engine.
Applications:
* Nissan Cedric (330, 430 and Y30)
* Nissan Gloria (330, 430 and Y30)

### L23

The L23 was a 2,262 cc (2.3 L; 138.0 cu in) engine produced in 1968. It produces 123 hp (92 kW). This engine was produced in limited numbers and was replaced by the L24 the following year. Bore and stroke were 83 mm × 69.7 mm (3.27 in × 2.74 in). The L23 was based on the design of the original L20.
Applications:
* 1968-69 Nissan Cedric Personal Six, Special Six and Super Six

### L24

The L24 was a 2,393 cc (2.4 L; 146.0 cu in) engine produced from 1969 through 1984. Like the L20A, it was based on the design of the L16. It produces 130 PS (128 bhp; 96 kW) and the version with twin side draught SU Carburettors produces 150 PS (148 bhp; 110 kW). Bore and stroke is 83 mm × 73.7 mm (3.27 in × 2.90 in).
A single carburetor version of the same engine was also standard in the Laurel sedan (240L) for various export markets, in the years 1982-1984. While the last generation Cedric to use this engine in Japan was the 230-series (1971–1975), Yue Loong of Taiwan installed it in 430-series Cedrics at least as late as 1984.
* 1970–1973 Datsun 240Z—150 PS (148 bhp; 110 kW)
* 1970–1971 Nissan Cedric/Gloria 130
* 1970–1972 Nissan Skyline 2400GT (C10)
* 1971–1972 Nissan Cedric/Gloria 230
* 1972–1977 Datsun 240K (C110)
* 1978–1981 Datsun 240K-GT (C210)
* 1979–1980 Nissan Laurel C230
* 1980–1984 Nissan Laurel C31 (export)

### L24E

Electronic fuel injection was added for the L24E, produced from 1977 through 1986. It produces 138 hp (103 kW; 140 PS) and 180 N⋅m (133 lb⋅ft) of torque. This engine was used in export market cars only and was never sold in Japan.
* 1977–1980 Datsun 810
* 1981 Datsun 810
* 1981–1985 Nissan Skyline R30
* 1982–1983 Datsun Maxima
* 1984 Nissan Maxima
* 1984–1990 Nissan Laurel C32

### L26

The L26 is the larger 2,565 cc (2.6 L; 156.5 cu in). Bore and stroke is 83 mm × 79 mm (3.27 in × 3.11 in). It was produced from 1973 through 1978. It produces 140–162 PS (138–160 bhp; 103–119 kW). In 1975, the L26 replaced the Prince G-20. The L26 makes around 165 bhp (167 PS; 123 kW).
Applications:
* 1972–1975 Nissan Cedric (230 Series)
* 1974–1977 Nissan Laurel (C130)
* 1974 Datsun 260Z 1974 for North America. 260Z sold in other countries until 1978
* 1976–1978 Nissan Cedric (330 Series)

### L28

The L28 is a 2,753 cc (2.8 L; 168.0 cu in) 12-valve engine. Bore and stroke is 86 mm × 79 mm (3.39 in × 3.11 in). The basic L28 is carbureted. As fitted to the 160-series Nissan Patrol, the L28 produces 120 PS (88 kW) at 4800 rpm and has a torque of 201 N⋅m (148 lb⋅ft) at 3,200 rpm.
Applications:
* 1975–1977 Nissan Laurel C130
* 1977–1979 Nissan Gloria 330
* 1978 Dome Zero
* 1978–1979 Nissan Cedric 330
* 1980–1989 Nissan Patrol 160
* 1982–1987 Datsun/Nissan Skyline R30 (South Africa)
* 1986–2002 Nissan Patrol 260

### L28E

The L28E is the enlarged 2,753 cc (2.8 L; 168.0 cu in) engine produced from 1975 to 1984 equipped with dish-top pistons from 1975 to 1978 and 1979 to 1983 with flat top pistons and a resulting compression ratio of 8.3:1. The E stands for electronic multiport fuel injection, provided by Bosch using the L-Jetronic system, and is one of the first Japanese produced vehicles to introduce the technology. For model year 1981 through model year 1983, the L28E received flat-top pistons and a high quench head, raising the compression ratio to 8.8:1, and thus increasing the power rating from 135 PS (99 kW; 133 hp) (1975–1980) to 145 PS (107 kW; 143 hp) (1981–1983).
* 1975–1978 Datsun 280Z (150 PS (110 kW; 148 hp))
* 1975–1986 Dome Zero
* 1979–1983 Datsun 280ZX
* 1980–1982 Nissan Leopard F30
* 1980–1989 Nissan Patrol 160
* Nissan Cedric
* Nissan Gloria
* Nissan AD-2 concept

### L28ET

The L28E was turbocharged in December 1980 to produce the L28ET for the 280ZX Turbo. The L28ET was produced through June 1983. The early versions had adjustable mechanical rockers though these were phased out after September 1982 in favor of hydraulic rockers. The L28ET produces 180 bhp (182 PS; 134 kW) at 5,600 rpm and 203 lb⋅ft (275 N⋅m) of torque at 2800 rpm. This engine was considered too powerful by Japan's Ministry of Transportation, who would only allow turbochargers to be installed in sub 2 litre-engined cars, and was therefore never sold in its homeland.
The L28ET used a single Garrett AiResearch TB03 internally wastegated turbocharger and no intercooler. Boost was limited to 6.8 psi (0.47 bar). Other modest changes were made to the turbo model, with static compression reduced to 7.4:1, and automatic transmission models were given a higher-volume oil pump. The most significant change aside from the turbocharger itself was the introduction of a new engine control system, Nissan's Electronic Concentrated Control System (ECCS).
Applications:
* Datsun 280ZX Turbo

### LD28

The LD28 is the diesel-version of the L28 engine. Robust 7-main bearing block design, like all L-series six-cylinder engines. Bore and stroke are 84.5 mm × 83 mm (3.33 in × 3.27 in) respectively.
* LD28
* 2,792 cc (2.8 L; 170.4 cu in)
* pre-combustion chamber
Power outputs: 91 PS (67 kW; 90 bhp) at 4,600 rpm and 17.3 kg⋅m (170 N⋅m; 125 lbf⋅ft) of torque at 2,400 rpm
* Nissan Gloria 430 and Y30 (1980 - 1985)
* Nissan Cedric 430 and Y30
* Nissan Laurel C31 and C32 (1980 - 1987)
* Nissan Skyline C210 and R30
* Datsun 810 G910
* Datsun Maxima G910
* Albin 27 boats from 1982 to 1992/3

### LD28T (turbocharged)

A turbocharged version of the LD28 diesel engine. There are no factory turbocharged LD28 engines available in the US market, nor has Nissan ever equipped any of its US-market cars/light trucks with a turbo-diesel engine. LD28Ts are only found in Japan, Australasia/New Zealand, southern Africa and parts of Europe.
Nissan also marketed LD28Ts as bare engines for genset and stationary engine uses and may be also found in maritime version.
Applications:
* Nissan Patrol (Y60 & Y61 Safari export version)
* Nissan Laurel (Euro only)

### DOHC 24v engines based on the L-series straight six

Shortly after producing the 16-valve version of the DOHC cylinder heads for the four-cylinder version of the L-series engines, OS Giken released a 24-valve version of the DOHC cylinder head for the six-cylinder version of the L-series engines. It produced 320 PS (235 kW) in naturally aspirated form with a maximum redline of 9000 rpm. Very few of these original TC24-B1 engines exist.
In 2013, a redesigned version of the 24-valve DOHC cylinder head was released. Osamu Okazaki says that he redesigned every component with more modern technology and materials. Revisions included switching from a timing chain to gears, offering fuel injection and coil pack ignition in addition to carburetors, and improved valvetrain and bottom end components that are better suited to a higher RPM. It produces 420 hp (310 kW; 430 PS) in naturally aspirated form and has a maximum redline of 10,000 rpm.
In recent years a whole host of new DOHC 4v L-series engines have cropped up. Derek Minetti, founder of Datsunworks based out of Florida, designed a DOHC 4v head based off of Honda's K20 inline four, utilizing many factory Honda K20 components in the valve train.
In 2024, Nismo released a one-off DOHC 4v head of their own design for the L-series block. Named the "TLX", this engine utilizes coil pack ignition, fuel injection, and individual throttle bodies. The show engine is said to have a bore of 89mm and a stroke of 79mm, displacing 2949cc. Though production is yet to be announced, Nismo stated that the redline is 7,500RPM, with horsepower figures around the 300HP range. Most notable of all is the relatively low redline compared to other DOHC 4v L-series heads.
In 2025, Pams displayed their first LZ6 engine at Tokyo Autos Salon in collaboration with Sung Kang and Veilside, for their Veilside '73 project. Although the engine was not displayed in Sung Kang's S30 Nissan/Datsun Z, it was displayed on a stand next to the car. The original gestation of the LZ6 dates back to the 1970s, when Nissan designed a DOHC 4v head for their L-series inline four cylinder engines, called the LZ competition engine. There were musings within the company to design a similar crossflow head for the inline six version, but this never came to fruition. However, recently the owner of Pams Labo, Ken Yoshioka, collaborated with JMC to develop the LZ6 head, with guidance from the original LZ engines designer, Yoshimasa Hayashi. The LZ6 has a displacement of 3.1L, a bore and stroke of 89mm and 84mm, and produces over 400HP with a redline around 9,500RPM. Like the OS Giken TC24-B1Z, the LZ6 uses a gear drive rather than a chain.
The RBL is a hybrid engine utilizing an L-series inline six block and the DOHC 4v head off of a Nissan RB engine. Very few of these engines exist as they're all custom made, requiring extensive modifications to the oil and coolant passages. In addition, modifications must be made to the timing system to utilize a timing chain, as the RB head originally used a timing belt. Footage of these engines in operation can be found on the Vintage Garage YouTube channel, and further information about the specifications can be found on the channel owner's spark88 blog. 9000RPM and power figures around the high 300 to low 400HP range are the targeted specific outputs.