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| "Advertised Duration" means you should only compare these numbers with grinds from the same manufacturer. Other vendors may measure it differently. | "Advertised Duration" means you should only compare these numbers with grinds from the same manufacturer. Other vendors may measure it differently. | ||
| + | = Engine Size = | ||
| + | Engine displacement doesn't matter. In certain years, all A12 A14 and A15 engines were fitted with the *same* camshaft. | ||
| + | |||
| + | For example: | ||
| + | 1982 B310 USA | ||
| + | Part Number 13001-H9800 CAMSHAFT A12A, A14, A15 USA | ||
| + | IN: 244, EX: 248 | ||
| + | |||
| + | |||
| + | However, in other years and markets different specs were used. For example: | ||
| + | 1982 B310 CANADA: | ||
| + | A12A Part Number 13001-H5000 CAMSHAFT A12A CAN | ||
| + | IN: 248, EX: 248 | ||
| + | A15 Part Number 13001-H9800 CAMSHAFT A14 CAN | ||
| + | IN: 244, EX: 248 | ||
| + | |||
| + | See [[Camshaft Comparison]] | ||
| + | [http://datsun1200.com/modules/myalbum/photo.php?lid=18422 http://datsun1200.com/modules/myalbum/photos/thumbs/18422.jpg] | ||
| = Early vs. Late = | = Early vs. Late = | ||
Revision as of 05:08, 14 February 2012
There are basically five factory camshaft grinds, from A10 to performance grinds.
Contents |
Overview
There are basically five factory camshaft grinds:
- 1000cc grind
- small bore grind
- large bore grind
- Performance grind for A12GX, A12T, A14T, EFI
- Hi-torque emission grind (1981-1982 USA)
However, these can be fitted to any engine. The emission grind cam was used in A12A, A14 and A15 engine -- all with same cam part number.
240/240 duration (A10 Datsun 1000) 248/248 duration (standard small bore) 248/256 duration (standard large bore) 256/256 duration (performance engines) 244/248 duration (Late USA emission)
| Cam: | A10 (B10) | A12 (1973 USA) | A12GX |
| Part: | 13001-18000 | 13001-H1000 | 13001-H2300 |
| HP: | 62hp@6000rpm | 69hp@6000rpm | 83hp@6800rpm |
| Torque: | 61.5 lb-ft | 10.0kg-m@4,400rpm | 9.7kg-m@3,600rpm |
| Exhaust open duration: | 240° | 248° | 256° |
| Intake open duration: | 240° | 248° | 256° |
| Intake opens at: | 12° | 14° BTDC | 20° BTDC |
| Intake closes at: | 48° | 54° ABDC | 56° ABDC |
| Exhaust opens at: | 50° | 56° BBDC | 58° BBDC |
| Exhaust closes at: | 10° | 12° ATDC | 18° ATDC |
| Lift: | ? | 8mm | 8.4mm |
Duration
"Advertised Duration" means you should only compare these numbers with grinds from the same manufacturer. Other vendors may measure it differently.
Engine Size
Engine displacement doesn't matter. In certain years, all A12 A14 and A15 engines were fitted with the *same* camshaft.
For example:
1982 B310 USA Part Number 13001-H9800 CAMSHAFT A12A, A14, A15 USA IN: 244, EX: 248
However, in other years and markets different specs were used. For example:
1982 B310 CANADA: A12A Part Number 13001-H5000 CAMSHAFT A12A CAN IN: 248, EX: 248 A15 Part Number 13001-H9800 CAMSHAFT A14 CAN IN: 244, EX: 248
See Camshaft Comparison
Early vs. Late
For 1974, the A-series engine was re-designed. Because the distributor moved from beside cylinder #1 to beside cylinder #3, a new gear was added to the cam. The oil pump eccentric was moved from #3 to #2 at the same time.
Top: July 1974-up camshaft
Bottom: 1967-1973 June camshaft
Competition Camshaft
Beware, some cams have no eccentric cam for the fuel pump. You will have to use an electric fuel pump with these cams.
Top: Tomei 80A competition cam
Bottom: Early cam
Specs
A10: 240/240 12/48/10/50
1974-up
- 13001-H9800 CAMSHAFT [Typical use: 1981-1982 USA]
- 244/248 duration
- USA B310 A14,A15 B310 0880-
- USA B310 A12A 0880- B310
- 13001-H5700 CAMSHAFT [Typical use: Performance engine]
- 248/256 duration .331 lift
- JPN B210 A12T, A14T
- JPN B310 A14E, A15E
- 13001-H5000 CAMSHAFT [Typical use: A12S]
- 248/248 duration
- JPN B120 A12S
- JPN B210 A12S
- JPN B310 A12S, A13S
- USA B310 A12A 0879-0780
- CAN B310 A12A
- 13001-H6200 ASSY-CAMSHAFT [Typical use: A14/A15]
- 248/256 duration
- JPN B210 A14S
- USA B210 A13, A14
- USA B210 F10 A14
- USA B310 A14,A15 -0780
- JPN B310 A14S, A15S
ADVERTISED DURATION 248/248 duration (standard small bore) * 13001-H5000/ 248/256 duration (standard large bore) * 13001-H6200 256/256 duration (performance engines) * 13001-H5700 .331 lift 244/248 duration (Late USA emission) * 13001-H9800
1967-1973
- 13001-H7000 ASSY-CAMSHAFT USA B110 A12 0772- 0 13001-H2300
- 13001-H2300 CAMSHAFT B110 JPN A12 GX
- 13001-H1000 CAMSHAFT B110 USA JPN A12
- 13001-18001 CAMSHAFT B10 JPN A10 0470- replaces 13001-18000 & 13001-H0100
- 13001-18000 CAMSHAFT JPN B10 A10
- 13001-H0100 CAMSHAFT JPN B10 A10
ADVERTISED DURATION 240/240 duration (A10 Datsun 1000) * 13001-H18001 248/248 duration * 13001-H1000 A12 256/256 duration .331 lift * 13001-H2300 A12 GX
Chart
| Part Number | @ | Ex. Dur | In. Dur | In. Open | In. Close | Ex. Close | Ex. Open | Lift (in) | Reference |
| 13001-18000 | ? | ||||||||
| 13001-H1000 | ? | 248 | 248 | 14 | 54 | 12 | 56 | 0.335 | photo |
| 13001-H2300 | ? | 256 | 256 | 20 | 56 | 18 | 58 | 0.353 | A12GX |
| 13001-H5000 | ? | 248 | 248 | 14 | 54 | 12 | 56 | photo | |
| 13001-H5700 | ? | 256 | 248 | 14 | 54 | 20 | 56 | 0.331 | here |
| 13001-H6200 | ? | 256 | 248 | 14 | 54 | 20 | 56 | 0.324 | photo |
| 13001-H9800 | ? | 248 | 244 | 14 | 50 | 12 | 56 | 1981 | |
| 99996-H1031 | ? | 300 | 0.487 | Nismo | |||||
| 99996-H1032 | ? | 310 | 0.487 | Nismo | |||||
| 13001-H5710 | 0.10 | 280 | 38 | 62 | 35 | 65 | 0.37 | topic | |
| 13001-H5711 | 0.10 | 0.37 | Nismo | ||||||
| ? | 0.10 | 320 | 0.413 | Nismo | |||||
| ? | 0.10 | 328 | 0.413 | Nismo |