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| - | Nissan-Datsun works competition LZ engine DOHC four-valve engine, was an improvement on the S20 Skyline (GT-R) twin cam engine. It was succeeded by the mighty [[FJ engine swap|FJ engine]]. The LZ used a L-series engine block but with a totally new cylinder head design. The LZ was a four-valve per cylinder design, with valve angles were quite shallow as in the revolutionary 1964 Honda F1 racing engine. The cams were driven by gears, and a special gear carrier bolted between the L-series block and timing chain cover. Above the gear carrier a short chain drove both cams. Custom pistons were used. | + | Nissan-Datsun Works {{wikiEx|Nissan_L_engine#LZ_(competition)|competition LZ engine}} DOHC four-valve engine was an improvement on the design S20 twin-cam engine from the {{wiki|Nissan Skyline GT-R}}. In turn the LZ was succeeded by the mighty [[FJ engine swap|FJ engine]]. The four-cylinder LZ used a '''L-series engine''' block but with a totally new cylinder head design. The LZ was a four-valve per cylinder design, with valve angles were quite shallow as in the revolutionary 1964 Honda F1 racing engine. The cams were driven by gears, and a special gear carrier bolted between the L-series block and timing chain cover. Above the gear carrier a short chain drove both cams. Custom pistons were used. |
| - | =Overview= | + | {{UploadPost|174_63db83fd8a947.jpg|497472}} |
| - | LZ "The Nissan Space-Age Twin Cam" suceeded the LY cross-flow heads. It was used 1973-1983. It was a "bolt-on option" supplied to works racers. They were campaigned in Japan Grand Prix, Safari Rally, and Super Silhouette Championship. They were originally called L14 Twin Cam, later referred to as LZ14. They were actually 1.6 liter to compete in the 1600 class. | + | |
| - | In May 1978, 大森スポーツコーナー (Omori, later NISMO) released the Formula Pacific LZ kit to the public. Price was 2,040,000 Yen (about $9,000 USD in 1978), so only serious racing teams could afford them. | + | = Overview = |
| + | <blockquote>Also See: | ||
| + | <br> | ||
| + | <br>Nissan Story: [https://www.nissan-global.com/EN/HERITAGE/short_story/en_p22-01.html Pedigree of the LZ]: The twin-cam engine that delivered a string of Nissan race & rally victories | ||
| + | <br> | ||
| + | <blockquote>Starring in the Japan GP, Safari Rally, and Super Silhouette Championship, the LZ was the motor sports engine behind Nissan’s formidable performance during the years when it had no twin-cam engine.</blockquote></blockquote> | ||
| - | http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%20History/LZ/temp-4.jpg | + | '''LZ''' "The Nissan Space-Age Twin Cam" succeeded the '''LY''' cross-flow heads. It was used 1973-1983. It was a "bolt-on option" supplied to works racers. They were campaigned in Japan Grand Prix, Safari Rally, and Super Silhouette Championship. They were originally called L14 Twin Cam, later referred to as LZ14. They were actually 1.6 liter to compete in the 1600 class. |
| - | When the FIA ruled that they would be eligible for 1973, Nissan got busy and the first LZ was track-tested in January 1973. Tested 28 February, 1973 at Fuji Speedway. | + | The two letters "LZ" refer to: |
| + | * L: L4-cylinder engine ({{wikiEx|Straight-four_engine|Inline 4}}) | ||
| + | * Z: DOHC 4-valve head | ||
| - | http://nissan-heritage-collection.com/NEWS/publicContents/index.php?page=2 | + | The four-valve design gave it superior breathing to any two-valve engine |
| + | <br>{{UploadPost|174_5cb3ece2efbbb.jpg|491190|was=Datsun%20History/LZ/temp-4.jpg}} | ||
| + | <br>When the [[FIA]] ruled that they would be eligible for 1973, Nissan got busy and the first LZ was track-tested in January 1973. Tested 28 February, 1973 at Fuji Speedway. | ||
| - | Racing Debut 1973 Japanese GP (Fuji Speedway) in Sunny Excellent (PB110) Coupe racers | + | <blockquote>[http://nissan-heritage-collection.com/NEWS/publicContents/index.php?page=2 Nissan Heritage Collection Story] in Japanese (includes a section on the LZ)</blockquote> |
| - | <br>http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%20History/LZ/temp-2.jpg | + | |
| + | Racing Debut 1973 Japanese GP (Fuji Speedway) in Sunny Excellent ([[PB110]]) Coupe racers | ||
| + | <br>{{UploadPost|174_5cb6e0e47947e.jpg|491209|Datsun%20History/LZ/temp-2.jpg}} | ||
| <br> This was 3 May 1973. | <br> This was 3 May 1973. | ||
| + | |||
| + | At the 1972 Japan GP, Nissan entered the Skyline GT-R and Sunny Excellent.<blockquote>However, the GT-R (TS-B Class) was bettered by Mazda Savanna RX-3, while the Excellent (TS-A Class) was beaten by the combined forces of the Toyota Celica & Corolla Levin. It was an ignominious defeat for Nissan. The sudden ascent of the rotary-engine machines gave Nissan pause, and the GT-R was absent from the Japan GP in the following year. This is why it was so important for Nissan that the Excellent should win.</blockquote> | ||
| Debut Specifications | Debut Specifications | ||
| Line 30: | Line 42: | ||
| [http://www.datrats.com.au/lz_twin_cams.htm Datrat's LZ Twin Cams] | [http://www.datrats.com.au/lz_twin_cams.htm Datrat's LZ Twin Cams] | ||
| - | <br>http://www.datrats.com.au/TS210_LZ14_SUNNY_small.JPG | + | <br>{{UploadPost|174_5cb3b78dd8a39.jpg|491185|was=Datsun%20Misc/datrats/TS210_LZ14_SUNNY.jpg}} |
| <br>TS-class B210 LZ14 Sunny GX 5 shown at the Tokyo Motor show, October 1973. | <br>TS-class B210 LZ14 Sunny GX 5 shown at the Tokyo Motor show, October 1973. | ||
| - | |||
| Nissan Work team placements: | Nissan Work team placements: | ||
| Line 44: | Line 55: | ||
| * 9 柳田春人 (Yanagida Haruto) | * 9 柳田春人 (Yanagida Haruto) | ||
| * 10 久保田洋史 (Kubota Hiroshi) | * 10 久保田洋史 (Kubota Hiroshi) | ||
| - | |||
| Later LZ got a flatter valve cover, crinkle finish painted black. | Later LZ got a flatter valve cover, crinkle finish painted black. | ||
| = LZ14= | = LZ14= | ||
| - | LZ14 was first raced May 3, 1973 in a [[PB110]] Sunny Excellent Coupe for TS-A class racing. The next week, LZ14s came in 1,2,3 at the [[1973 Grand Prix]] of Japan. They had 180PS. | + | LZ14 (1600cc) was first raced May 3, 1973 in a [[PB110]] Sunny Excellent Coupe for TS-A class racing. The next week, LZ14s came in 1,2,3 at the [[1973 Grand Prix]] of Japan. They had 180PS. |
| + | <br>{{Album|28778}} | ||
| + | |||
| + | bore 87.8 mm (4.8mm more than L14/L16) | ||
| + | stroke 66 mm (same as L14) | ||
| + | |||
| + | <blockquote>[http://nissan-heritage-collection.com/NEWS/publicContents/index.php?page=2 Nissan Global] The LZ14 used in the 1973 Japan GP is 1,598cc (φ87.8mm: 4.8mm bore up). With EGI specifications, the maximum output is 200ps/9,400rpm and the maximum torque is 17.0kgm/6,800rpm. The cylinder head is made of aluminum alloy instead of cast iron. The 16 intake and exhaust valves are also made of titanium.The valve angle is narrow at 34°, the combustion chamber is an ideal shallow pent roof type, and the compression ratio is 11.5 to 12.0.The light alloy piston is a flat head. It has a deep valve recess and is set with a mirror-polished forged steel connecting rod for strict weight matching.The | ||
| + | camshaft drive system is a unique combination of gear and chain, with 4 on the crank side. Stage gear drive, double roller chain mechanism on the cam side.The LZ engine features a thin housing that houses the cam drive system.The head cover has a rounded shape that is different from the later flat type, and is painted black. The most notable feature of the LZ engine is that it can be used in the engine room of commercial vehicles with limited space in a short period of time, even though it adopts a narrow-angle valve layout that tends to increase the overall height. It would have developed a compact racing engine that fits.</blockquote> | ||
| + | {{Album|18983}} {{Album|18982}} | ||
| - | http://www.datrats.com.au/PB210-LZ.JPG | + | {{UploadPost|174_63db845fcfda8.jpg|497472|was=Photo\PB210-LZ.jpg\Datsun%20Misc/datrats}} |
| - | Also see [[PB110#Racing|PB110 Racing]] | + | {{See|PB110#Racing}} |
| * Mikuni flat slide throttle body | * Mikuni flat slide throttle body | ||
| - | Also see http://www.datrats.com.au/lz_twin_cams.htm | + | Also see [https://web.archive.org/web/20090321184948/http://www.datrats.com.au/lz_twin_cams.htm http://www.datrats.com.au/lz_twin_cams.htm] |
| * Lots of Pic! and history | * Lots of Pic! and history | ||
| Line 69: | Line 87: | ||
| 1979 JAF Fuji win | 1979 JAF Fuji win | ||
| - | == Australia == | + | = LZ14 Early = |
| - | Club member [http://datsun1200.com/userinfo.php?uid=1853 davie] owned an ex-works PB210 with LZ engine. It was a Japanese import to Australia, one of three cars brought in for the 1976 Southern Cross Rally. He partially restored it during 2003, less the flares and twin cam head, to match class rules he is allowed wanted to campaign the car under. The head reportedly was sold out of country. By 2007 davie had sold it to the Australian state of Victoria, where it was been fully restored by the new owner. It was used in historic events. | + | [{{Post|497463}} Sold at auction 485,000 Yen] 2023 January 31 |
| - | [http://datsun1200.com/modules/myalbum/photo.php?lid=1921 http://datsun1200.com/uploads/thumbs/1921.jpg] | + | Early LZ14 had the rounded cam cover (lacks the square cam-ends of the later engines) |
| + | {{UploadPost|12605_63da3bcf504ab.jpg|497472}} {{UploadPost|12605_63da3bdb6d1e2.jpg|497472}} {{UploadPost|12605_63da3be6109e9.jpg|497472}} {{UploadPost|12605_63da3bedddc80.jpg|497472}} {{UploadPost|12605_63da3bf7925fe.jpg|497472}} {{UploadPost|12605_63da3bfeac8f7.jpg|497472}} {{UploadPost|12605_63da3c06989fd.jpg|497472}} {{UploadPost|12605_63da3c0f471f3.jpg|497472}} {{UploadPost|12605_63da3c15b9d5b.jpg|497472}} {{UploadPost|12605_63da3c1ee3336.jpg|497472}} {{UploadPost|12605_63da3c26c70c1.jpg|497472}} {{UploadPost|12605_63da3c2f6e9a2.jpg|497472}} {{UploadPost|174_63db83701877a.jpg|497472}} | ||
| - | Sheka Mehta drove a PB210 in the 1977 Southern Cross Rally. Only one car came in from Japan for the 1977 event. Gerry Ball gained ownership. The car then passed on to ex-works driver Geoff Portman who used the head to build a 2.4 litre LZ-based engine for his Bluebird project. The car was then bought by myself and Steven Blair as a complete rolling shell (without engine) with flares intact in original works colours. The car was sold in Sydney and then passed on to one of the members of Brindabella Motorsport club in Canberra. | + | = LZ14 Final Type = |
| + | Now the LZ perfected | ||
| + | early head vs deep head casting (final type) | ||
| + | <br>{{Album|28775}} | ||
| + | |||
| + | cam sits down inside the deep head casting. A flat cam cover is used | ||
| + | <br>{{Album|28776}} | ||
| + | |||
| + | Final twin-port type vs Early single-port type | ||
| + | <br>{{Album|28773}} {{Album|28774}} | ||
| + | <br>{{translate|プロトタイプ インテーク|prototype intake}} | ||
| + | <br>{{translate|プロトタイプ エキゾースト|prototype exhaust}} | ||
| + | |||
| + | = LZ14 Australia = | ||
| + | Club member [http://datsun1200.com/userinfo.php?uid=1853 davie] owned an ex-works PB210 with LZ engine. It was a Japanese import to Australia, one of three cars brought in for the 1976 Southern Cross Rally. He partially restored it during 2003, less the flares and twin cam head, to match class rules he is allowed wanted to campaign the car under. The head reportedly was sold out of country. By 2007 davie had sold it to the Australian state of Victoria, where it was been fully restored by the new owner. It was used in historic events. | ||
| + | |||
| + | {{Album|1921}} | ||
| + | |||
| + | Sheka Mehta drove a PB210 in the 1977 Southern Cross Rally. Only one car came in from Japan for the 1977 event. Gerry Ball gained ownership. The car then passed on to ex-works driver Geoff Portman who used the head to build a 2.4 litre LZ-based engine for his Bluebird project. The car was then bought by myself and Steven Blair as a complete rolling shell (without engine) with flares intact in original works colours. The car was sold in Sydney and then passed on to one of the members of Brindabella Motorsport club in Canberra. | ||
| = LZ16 = | = LZ16 = | ||
| LZ16 was developed for Formula Pacific racing. Maybe they a few of these in New Zealand still? | LZ16 was developed for Formula Pacific racing. Maybe they a few of these in New Zealand still? | ||
| - | [http://www.naprec.co.jp/cgi-bin/nicky/nicky.cgi?DATE=200709?MODE=MONTH http://ddgonzal.members.winisp.net/getThumb.aspx?width=360&uri=http://www.naprec.co.jp/nicky/2007/grp0915114804.jpg] | + | [http://www.naprec.co.jp/cgi-bin/nicky/nicky.cgi?DATE=200709?MODE=MONTH photo] |
| + | <br>{{ExtPhoto|http://www.naprec.co.jp/nicky/2007|grp0915114804.jpg}} | ||
| Formula Pacific as a 1600 engine with a 87.8mm bore. | Formula Pacific as a 1600 engine with a 87.8mm bore. | ||
| Line 87: | Line 125: | ||
| = LZ18= | = LZ18= | ||
| The LZ18 2-liter LZ engine was used in the 710 SSS rally cars, first raced in the 1975 Southern Cross Rally. A victory in the 1977 Southern Cross Rally | The LZ18 2-liter LZ engine was used in the 710 SSS rally cars, first raced in the 1975 Southern Cross Rally. A victory in the 1977 Southern Cross Rally | ||
| - | |||
| * 1,941 cc | * 1,941 cc | ||
| * 200 PS @ 7,200 RPM | * 200 PS @ 7,200 RPM | ||
| + | |||
| + | {{Album|2310}} | ||
| = LZ20B = | = LZ20B = | ||
| LZ20B was a updated LZ developed by Oppama Works. | LZ20B was a updated LZ developed by Oppama Works. | ||
| - | |||
| * 1,952 cc or 1,975 cc | * 1,952 cc or 1,975 cc | ||
| * 210 to 220PS @ 7,600 rpm | * 210 to 220PS @ 7,600 rpm | ||
| - | + | LZ20B (Green Top ) | |
| - | http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%20History/LZ/temp-3.jpg | + | <br>{{Photo|temp-3.jpg|Datsun%20History/LZ}} |
| - | <br>LZ20B (Green Top ) | + | |
| It was fitted to the Group 4 Skyline DR30 and Violet A10. It was rated at 230PS @ 7,500 RPM with air horns and only 159 lb-ft torque. Redline was 8,000 RPM. | It was fitted to the Group 4 Skyline DR30 and Violet A10. It was rated at 230PS @ 7,500 RPM with air horns and only 159 lb-ft torque. Redline was 8,000 RPM. | ||
| Line 107: | Line 144: | ||
| Shekar Mehta drove a 1981 PA10 Nissan Violet GT with LZ20 engine, which was a Group 4 homologation special. | Shekar Mehta drove a 1981 PA10 Nissan Violet GT with LZ20 engine, which was a Group 4 homologation special. | ||
| - | <br>[http://www.datrats.com.au/lz_twin_cams.htm http://www.datrats.com.au/LZ-A10_small1.JPG] | + | <br>{{Photo!|LZ-A10.jpg|Datsun%20Misc/datrats}} |
| * Engine LZ20B 4-cylinder DOHC 16 valve | * Engine LZ20B 4-cylinder DOHC 16 valve | ||
| Line 117: | Line 154: | ||
| * Dry Sump | * Dry Sump | ||
| - | [http://www.datrats.com.au/lz_twin_cams.htm Datrats's LZ Twin Cams] | + | |
| - | http://www.datrats.com.au/LZ18_twin3_.JPG | + | {{UploadPost|174_5cb26111bd24e.jpg|491181|was=Datsun%20Misc/datrats/LZ18_twin3_.jpg}} {{AlbumH|2311|jpg|600}} |
| + | |||
| + | Group 4 rally car | ||
| + | <br>{{Photo!|temp-5.jpg|Datsun%20History/LZ}} | ||
| + | |||
| + | Safari Rally | ||
| + | * 1981 Violet GT (PA10) Shekar Mehta - Overall winner | ||
| + | * 1982 Violet GT (PA10) Shekar Mehta - Overall winner | ||
| = LZ21 = | = LZ21 = | ||
| Line 124: | Line 168: | ||
| = LZ20BT Turbo = | = LZ20BT Turbo = | ||
| + | The LZ20B Turbo (1979-1983) put out more power than F1 engines at the time: 570PS | ||
| + | |||
| The LZ20 is a L20B with a "T05B" turbocharger and electronic fuel injection and was tuned to 500 PS (370 kW; 490 hp) @8000 rpm in the '83 NISSAN SILVIA S12 Super Silhoutte Group 5 racecar. Later it devloped in final specification to 570 PS @ 7600 RPM and 398 lb-ft @ 6400 RPM, which . | The LZ20 is a L20B with a "T05B" turbocharger and electronic fuel injection and was tuned to 500 PS (370 kW; 490 hp) @8000 rpm in the '83 NISSAN SILVIA S12 Super Silhoutte Group 5 racecar. Later it devloped in final specification to 570 PS @ 7600 RPM and 398 lb-ft @ 6400 RPM, which . | ||
| Line 132: | Line 178: | ||
| * 1982 Nissan Bluebird 910 tube-frame racer driven by 柳田春人 (Yanagida Haruto) | * 1982 Nissan Bluebird 910 tube-frame racer driven by 柳田春人 (Yanagida Haruto) | ||
| - | *: [http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%20History/LZ/temp-1.jpg http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%20History/LZ/th_temp-1.jpg] | + | *: {{Photo|temp-1.jpg|Datsun%20History/LZ}} |
| * Nissan Sylvia/Gazelle S12 driven by 星野一義 (Kazuyoshi Hoshino) | * Nissan Sylvia/Gazelle S12 driven by 星野一義 (Kazuyoshi Hoshino) | ||
| *: #23 Impul Turbo Silhouette 1982 | *: #23 Impul Turbo Silhouette 1982 | ||
| - | *: [http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%20History/LZ/temp.jpg http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%20History/LZ/th_temp.jpg] | + | *: {{Photo|temp.jpg|Datsun%20History/LZ}} |
| * Works Skyline R30 driven by 長谷見昌弘 (Masahiro Hasemi) | * Works Skyline R30 driven by 長谷見昌弘 (Masahiro Hasemi) | ||
| + | *: {{Photo|temp-6.jpg|Datsun%20History/LZ}} | ||
| * March 83G race car to run in the 1985 Le Mans series | * March 83G race car to run in the 1985 Le Mans series | ||
| * March 85G race car to run in the 1986 Le Mans series | * March 85G race car to run in the 1986 Le Mans series | ||
| + | *: Nissan purchased three Group C spec [http://www.ultimatecarpage.com/car/3765/March-85G-Nissan.html March 85G]. Only one was fitted with the LZ | ||
| + | *: {{UploadPost|174_5cb3b883b2a22.jpg|491185}} | ||
| * Group C Car Endurance Championship (JSPC) | * Group C Car Endurance Championship (JSPC) | ||
| + | Formula Silhoutte Group 5 with T05B turbos, 570ps/7600rpm (55kgm/6400rpm) with Lucas mechanical fuel injection. It was fitted with black cover labeled NISSAN TURBO. | ||
| + | <br>{{ExtPhoto|http://www.attack-racing.com/fujisawa/photo|lz20.jpg}} | ||
| - | * Formula Silhoutte Group 5 with T05B turbos, 570ps/7600rpm (55kgm/6400rpm) with Lucas mechanical fuel injection | + | LZ20B was fitted to the GR8 sports, [[PB210|PB211]] race car, as well as Skyline DR30 and Stanza/Violet PA10. |
| - | It was fitted with black cover labeled NISSAN TURBO. | + | * Engine：LZ20B（4 cylinder DOHC 16 valve） |
| + | * Swept volume：2082cc （Garret Turbo） | ||
| + | * Bore×Stroke：87.8×86.0mm | ||
| + | * Power：570ps/7600rpm | ||
| + | * Torque：57.0kgm/6400rpm | ||
| + | * Lucas mechanical fuel injection | ||
| - | [http://www.attack-racing.com/fujisawa/7.htm http://www.attack-racing.com/fujisawa/photo/lz20.jpg] | + | [http://bbs.enjoykorea.jp/tbbs/read.php?board_id=pcar&nid=8413 Green Top LZ20B] |
| + | <br>{{Album|28746|was=Photo\LZ20B-2.jpg\Datsun%20Misc/datrats}} | ||
| + | * Garrett turbo: 570 PS | ||
| + | * Fitted to PA10 Violet for Safari Rally | ||
| - | = Others = | + | = 8-port Engine = |
| + | Is this an LZ20B Turbo? | ||
| + | |||
| + | [http://minkara.carview.co.jp/userid/150598/blog/7288893/ blog] photo. | ||
| + | <br>NOTE: The turbo exhaust manifold does not belong to the engine | ||
| + | <br>{{UploadPost|174_5cb3b7b32a561.jpg|491185}} | ||
| + | |||
| + | [http://blog.livedoor.jp/datrally/archives/2007-04.html photo] | ||
| + | <br>{{ExtPhoto|http://image.blog.livedoor.jp/datrally/imgs/7/b|7bbc72fc.jpg}} | ||
| + | |||
| + | [http://blog.livedoor.jp/datrally/archives/2007-04.html photo] | ||
| + | <br>{{ExtPhoto|http://image.blog.livedoor.jp/datrally/imgs/c/6|c642b78f.jpg}} | ||
| + | |||
| + | [http://blog.livedoor.jp/datrally/archives/2007-04.html photo] | ||
| + | <br>{{ExtPhoto|http://image.blog.livedoor.jp/datrally/imgs/f/0|f039bdcb.jpg}} | ||
| + | |||
| + | [http://blog.livedoor.jp/datrally/archives/2007-04.html photo] | ||
| + | <br>{{ExtPhoto|http://image.blog.livedoor.jp/datrally/imgs/2/5|25b5577c.jpg}} | ||
| + | |||
| + | [http://blog.livedoor.jp/datrally/archives/2007-04.html photo] | ||
| + | <br>{{ExtPhoto|http://image.blog.livedoor.jp/datrally/imgs/b/c|bc198ccd.jpg}} | ||
| + | |||
| + | http://www6.ocn.ne.jp/~fuze/page017.html | ||
| + | <br>{{ExtPhoto|http://www6.ocn.ne.jp/~fuze|img006.jpg}} | ||
| + | |||
| + | {{Upload|16379_4fd47c08af758.jpg}} | ||
| + | |||
| + | = Nissan Competition = | ||
| LZ competition head could be purchased by [[Nissan Competition]]. It could be fitted to L-series or Z-series blocks. | LZ competition head could be purchased by [[Nissan Competition]]. It could be fitted to L-series or Z-series blocks. | ||
| - | * The LZ22 is a Z22 block with Z22 crankshaft and the LZ20B head | + | = Formula Pacific = |
| - | * The LZ24 (Green Top) S110 Sylvia WRC cars | + | In May 1978, 大森スポーツコーナー (Omori, later NISMO) released the Formula Pacific LZ kit to the public. Price was 2,040,000 Yen (about $9,000 USD in 1978), so only serious racing teams could afford them. |
| + | |||
| + | １９８９年１０月、NISSAN L14 ENGINE DOHC 4 VALVE "FORMULA PACIFIC" RACING PARTSカタログ。日産自動車株式会社・宣伝部 宣伝第三課・発行 210x295mm 12 pages | ||
| + | <br>{{UploadPostH|174_5cb1519ae38ed.jpg|491170|300|was=wiki/FPa.jpg}} {{UploadPost|174_5cb151a4b043c.jpg|491170|was=wiki/FPb.jpg}} {{UploadPost|174_5cb151aee702e.jpg|491170|was=wiki/FPc.jpg}} | ||
| + | ①シリンダー・ブロック・パーツ | ||
| + | ②シリンダー・ヘッド・パーツ | ||
| + | ③ピストン＆コンロッド・パーツ | ||
| + | ④カム&バルブ・メカニズム・パーツ | ||
| + | ⑤バルブ・キャップ・パーツ | ||
| + | ⑥クランク＆フライホイール・パーツ | ||
| + | ⑦オイル・パン・パーツ | ||
| + | ⑧シリンダー・ヘッド・カバー・パーツ | ||
| + | ⑨ギア・トレーン・パーツ | ||
| + | ⑩フロントカバー・パーツ | ||
| + | ⑪オイル・ポンプ・パーツ | ||
| + | ⑫オイル・フィルター・パーツ | ||
| + | ⑬ウオーターポンプ・パーツ | ||
| + | ⑭クラッチ・ハウジング＆スターター・パーツ | ||
| + | ⑮ＣＤＩ・ユニット・パーツ | ||
| + | ⑯キャブレーター・パーツ。以上掲載 | ||
| + | |||
| + | = Magazine Articles = | ||
| + | Old-timer No. 5 {{translate|LZ4気筒コレクション|LZ 4-cylinder Collection}} | ||
| + | {{Album|28770}} | ||
| + | = Other LZ Engines = | ||
| + | In modern enthusiast lingo: | ||
| + | * LZ22 refers to a hybrid: [[Z|Z22]] block & crankshaft with [[L|L20B]] head. ''Not an actual LZ engine''. | ||
| + | * LZ24 (Green Top) was fitted to S110 Silvia WRC cars (240RS) | ||
| - | [[Category:Engine Mechanical]] | + | [[Category:Engine Modifications]] |
| + | [[Category:Racing]] | ||
| + | [[Category:Nissan Engines]]{{End}} | ||
Current revision
Nissan-Datsun Works competition LZ engineᵂ DOHC four-valve engine was an improvement on the design S20 twin-cam engine from the Nissan Skyline GT-Rᵂ. In turn the LZ was succeeded by the mighty FJ engine. The four-cylinder LZ used a L-series engine block but with a totally new cylinder head design. The LZ was a four-valve per cylinder design, with valve angles were quite shallow as in the revolutionary 1964 Honda F1 racing engine. The cams were driven by gears, and a special gear carrier bolted between the L-series block and timing chain cover. Above the gear carrier a short chain drove both cams. Custom pistons were used.
Contents |
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Overview
Also See:
Nissan Story: Pedigree of the LZ: The twin-cam engine that delivered a string of Nissan race & rally victories
Starring in the Japan GP, Safari Rally, and Super Silhouette Championship, the LZ was the motor sports engine behind Nissan’s formidable performance during the years when it had no twin-cam engine.
LZ "The Nissan Space-Age Twin Cam" succeeded the LY cross-flow heads. It was used 1973-1983. It was a "bolt-on option" supplied to works racers. They were campaigned in Japan Grand Prix, Safari Rally, and Super Silhouette Championship. They were originally called L14 Twin Cam, later referred to as LZ14. They were actually 1.6 liter to compete in the 1600 class.
The two letters "LZ" refer to:
* L: L4-cylinder engine (Inline 4ᵂ)
* Z: DOHC 4-valve head
The four-valve design gave it superior breathing to any two-valve engine
When the FIA ruled that they would be eligible for 1973, Nissan got busy and the first LZ was track-tested in January 1973. Tested 28 February, 1973 at Fuji Speedway.
Nissan Heritage Collection Story in Japanese (includes a section on the LZ)
Racing Debut 1973 Japanese GP (Fuji Speedway) in Sunny Excellent (PB110) Coupe racers
This was 3 May 1973.
However, the GT-R (TS-B Class) was bettered by Mazda Savanna RX-3, while the Excellent (TS-A Class) was beaten by the combined forces of the Toyota Celica & Corolla Levin. It was an ignominious defeat for Nissan. The sudden ascent of the rotary-engine machines gave Nissan pause, and the GT-R was absent from the Japan GP in the following year. This is why it was so important for Nissan that the Excellent should win.
Debut Specifications
- 1,598 cc (Bore 87.8mm: 4.8mm oversize)
- EGI (Nissan EFI)
- 200ps @ 9,400 rpm,
- torque 17.0kgm @ 6,800 rpm
- Titanium intake and exhaust valves
- Four valve-per-cylinder, pentroof design with narrow 34 degree valve angle layout
- Flat-top pistons
- Compression ratio: 11.5 to 12.0
- mirror-polished forged steel connecting rods
- Double roller chain
- 4-gear train
Datrat's LZ Twin Cams
TS-class B210 LZ14 Sunny GX 5 shown at the Tokyo Motor show, October 1973.
Nissan Work team placements:
- 1 高橋国光 (Kunimitsu Takahashi)
- 2 北野元 (Kitano Hazime) #1 pole position at 17 minutes 31 seconds
- 3 都平健二 (Tohira Kenji)
- 5 鈴木誠一 (Suzuki Seiichi)
- 6 辻本征一郎 (Tsuzimoto Tadashi)
- 7 寺西孝利 (Teranishi Takatoshi)
- 8 篠原孝道 (Shinohara Takamiti)
- 9 柳田春人 (Yanagida Haruto)
- 10 久保田洋史 (Kubota Hiroshi)
Later LZ got a flatter valve cover, crinkle finish painted black.
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LZ14
LZ14 (1600cc) was first raced May 3, 1973 in a PB110 Sunny Excellent Coupe for TS-A class racing. The next week, LZ14s came in 1,2,3 at the 1973 Grand Prix of Japan. They had 180PS.
bore 87.8 mm (4.8mm more than L14/L16) stroke 66 mm (same as L14)
Nissan Global The LZ14 used in the 1973 Japan GP is 1,598cc (φ87.8mm: 4.8mm bore up). With EGI specifications, the maximum output is 200ps/9,400rpm and the maximum torque is 17.0kgm/6,800rpm. The cylinder head is made of aluminum alloy instead of cast iron. The 16 intake and exhaust valves are also made of titanium.The valve angle is narrow at 34°, the combustion chamber is an ideal shallow pent roof type, and the compression ratio is 11.5 to 12.0.The light alloy piston is a flat head. It has a deep valve recess and is set with a mirror-polished forged steel connecting rod for strict weight matching.The camshaft drive system is a unique combination of gear and chain, with 4 on the crank side. Stage gear drive, double roller chain mechanism on the cam side.The LZ engine features a thin housing that houses the cam drive system.The head cover has a rounded shape that is different from the later flat type, and is painted black. The most notable feature of the LZ engine is that it can be used in the engine room of commercial vehicles with limited space in a short period of time, even though it adopts a narrow-angle valve layout that tends to increase the overall height. It would have developed a compact racing engine that fits.
See also: PB110#Racing
- Mikuni flat slide throttle body
Also see http://www.datrats.com.au/lz_twin_cams.htm
- Lots of Pic! and history
And there is an LZ14 engine for the Formula Pacific racecars and it produces 205 PS (151 kW; 202 hp) @10200 rpm and for qualifying and non endurance events they used an LZ14 with 240 PS (180 kW; 240 hp) @11000 rpm. The LZ14 is NA-engine (naturally aspirated) and had a 66 mm (2.598 in) stroke and 87.8 mm (3.457 in) bore.
1978 Formula Pacific Rim Championships (FP1600), and Hisashi people in LZ14 (1,598 cc and 225PS+).
1978 JAF Suzuka GP
1979 JAF Fuji win
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LZ14 Early
POST Sold at auction 485,000 Yen 2023 January 31
Early LZ14 had the rounded cam cover (lacks the square cam-ends of the later engines)
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LZ14 Final Type
Now the LZ perfected
early head vs deep head casting (final type)
cam sits down inside the deep head casting. A flat cam cover is used
Final twin-port type vs Early single-port type
プロトタイプ インテーク
prototype intake
プロトタイプ エキゾースト
prototype exhaust
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LZ14 Australia
Club member davie owned an ex-works PB210 with LZ engine. It was a Japanese import to Australia, one of three cars brought in for the 1976 Southern Cross Rally. He partially restored it during 2003, less the flares and twin cam head, to match class rules he is allowed wanted to campaign the car under. The head reportedly was sold out of country. By 2007 davie had sold it to the Australian state of Victoria, where it was been fully restored by the new owner. It was used in historic events.
Sheka Mehta drove a PB210 in the 1977 Southern Cross Rally. Only one car came in from Japan for the 1977 event. Gerry Ball gained ownership. The car then passed on to ex-works driver Geoff Portman who used the head to build a 2.4 litre LZ-based engine for his Bluebird project. The car was then bought by myself and Steven Blair as a complete rolling shell (without engine) with flares intact in original works colours. The car was sold in Sydney and then passed on to one of the members of Brindabella Motorsport club in Canberra.
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LZ16
LZ16 was developed for Formula Pacific racing. Maybe they a few of these in New Zealand still?
Formula Pacific as a 1600 engine with a 87.8mm bore.
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LZ18
The LZ18 2-liter LZ engine was used in the 710 SSS rally cars, first raced in the 1975 Southern Cross Rally. A victory in the 1977 Southern Cross Rally
- 1,941 cc
- 200 PS @ 7,200 RPM
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LZ20B
LZ20B was a updated LZ developed by Oppama Works.
- 1,952 cc or 1,975 cc
- 210 to 220PS @ 7,600 rpm
LZ20B (Green Top )
It was fitted to the Group 4 Skyline DR30 and Violet A10. It was rated at 230PS @ 7,500 RPM with air horns and only 159 lb-ft torque. Redline was 8,000 RPM.
In 1978-1980 WRC cars was the Violet GT (Datsun 710)
Shekar Mehta drove a 1981 PA10 Nissan Violet GT with LZ20 engine, which was a Group 4 homologation special.
- Engine LZ20B 4-cylinder DOHC 16 valve
- Intake valve: 33mm x 2
- Exhaust valve: 29.5 mm x2
- Swept volume 2082cc
- Solex PHH50 x 2
- Mitsubishi CDI ignition
- Dry Sump
Group 4 rally car
Safari Rally
- 1981 Violet GT (PA10) Shekar Mehta - Overall winner
- 1982 Violet GT (PA10) Shekar Mehta - Overall winner
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LZ21
In 1978-1980 WRC cars was the Violet GT (Datsun 710) with 2085cc
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LZ20BT Turbo
The LZ20B Turbo (1979-1983) put out more power than F1 engines at the time: 570PS
The LZ20 is a L20B with a "T05B" turbocharger and electronic fuel injection and was tuned to 500 PS (370 kW; 490 hp) @8000 rpm in the '83 NISSAN SILVIA S12 Super Silhoutte Group 5 racecar. Later it devloped in final specification to 570 PS @ 7600 RPM and 398 lb-ft @ 6400 RPM, which .
- 2082 cc (2.1 liter)
A turbocharged LZ20BT Garret Turbo four cylinder engine was used in the RS Skyline 2000 Turbo and these Nissan Super Silhouette race cars:
- 1982 Nissan Bluebird 910 tube-frame racer driven by 柳田春人 (Yanagida Haruto)
-
- Nissan Sylvia/Gazelle S12 driven by 星野一義 (Kazuyoshi Hoshino)
- #23 Impul Turbo Silhouette 1982
-
- Works Skyline R30 driven by 長谷見昌弘 (Masahiro Hasemi)
-
- March 83G race car to run in the 1985 Le Mans series
- March 85G race car to run in the 1986 Le Mans series
- Nissan purchased three Group C spec March 85G. Only one was fitted with the LZ
-
- Group C Car Endurance Championship (JSPC)
Formula Silhoutte Group 5 with T05B turbos, 570ps/7600rpm (55kgm/6400rpm) with Lucas mechanical fuel injection. It was fitted with black cover labeled NISSAN TURBO.
LZ20B was fitted to the GR8 sports, PB211 race car, as well as Skyline DR30 and Stanza/Violet PA10.
- Engine：LZ20B（4 cylinder DOHC 16 valve）
- Swept volume：2082cc （Garret Turbo）
- Bore×Stroke：87.8×86.0mm
- Power：570ps/7600rpm
- Torque：57.0kgm/6400rpm
- Lucas mechanical fuel injection
- Garrett turbo: 570 PS
- Fitted to PA10 Violet for Safari Rally
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8-port Engine
Is this an LZ20B Turbo?
blog photo.
NOTE: The turbo exhaust manifold does not belong to the engine
http://www6.ocn.ne.jp/~fuze/page017.html
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Nissan Competition
LZ competition head could be purchased by Nissan Competition. It could be fitted to L-series or Z-series blocks.
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Formula Pacific
In May 1978, 大森スポーツコーナー (Omori, later NISMO) released the Formula Pacific LZ kit to the public. Price was 2,040,000 Yen (about $9,000 USD in 1978), so only serious racing teams could afford them.
１９８９年１０月、NISSAN L14 ENGINE DOHC 4 VALVE "FORMULA PACIFIC" RACING PARTSカタログ。日産自動車株式会社・宣伝部 宣伝第三課・発行 210x295mm 12 pages
①シリンダー・ブロック・パーツ ②シリンダー・ヘッド・パーツ ③ピストン＆コンロッド・パーツ ④カム&バルブ・メカニズム・パーツ ⑤バルブ・キャップ・パーツ ⑥クランク＆フライホイール・パーツ ⑦オイル・パン・パーツ ⑧シリンダー・ヘッド・カバー・パーツ ⑨ギア・トレーン・パーツ ⑩フロントカバー・パーツ ⑪オイル・ポンプ・パーツ ⑫オイル・フィルター・パーツ ⑬ウオーターポンプ・パーツ ⑭クラッチ・ハウジング＆スターター・パーツ ⑮ＣＤＩ・ユニット・パーツ ⑯キャブレーター・パーツ。以上掲載
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Magazine Articles
Old-timer No. 5
LZ4気筒コレクション
LZ 4-cylinder Collection
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Other LZ Engines
In modern enthusiast lingo:
- LZ22 refers to a hybrid: Z22 block & crankshaft with L20B head. Not an actual LZ engine.
- LZ24 (Green Top) was fitted to S110 Silvia WRC cars (240RS)
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