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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 |
Identification
Nissan Competition cams were stamped on the end:
Most aftermarket cams are also stamped there.
A10 cams are cast "180" or other numbers
Early 1200 case "H10" or other numbers
Late 1200 cams are cast "H50" or other numbers
Aftermarket cams use a Nissan blank, and regrinds use a stock cam.
Stock factory A12T cam in Nismo packaging:
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
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
Nissan Competition Parts
CAMSHAFTS & RELATED COMPONENTS (A-SERIES)
PART NO. DESCRIPTION QTY REQ.
- 13001-H2300 GX CAMSHAFT (.331"/256
- 13001-H5700 A14E stock 256° 20/62/65/35/12/15 lift 8.4, clearance .35
- 13001-H5710 70° camshaft 280° 38/62/65/35/12/15 lift 9.4, clearance .25
- recommended for rallies
- limit RPM 7600, normal RPM 7200
- 13001-H5711 74° camshaft 296° 46/70/73/43/12/15 lift 9.4, clearance .25
- recommended for gymkhanas
- limit RPM 7800, normal RPM 7400
- 13001-H5712 80° camshaft 320° 58/82/85/55/12/15 lift 10.5, clearance .25
- recommended for racing
- limit RPM 8500, normal RPM 8000
- 13001-H5713 82° camshaft 328° 62/86/62/55/12/12 lift 10.5, clearance .25
Specs
Change for 1973
Aftermarket Grinds
JTS
JTS 104CB
JTS 140-6
Camtech
Camtech 600A-68A-Turbo
Camtech
Camtech #618 239/231 RPM RANGE 2000-6000 #639 254/254 RPM RANGE 2400-6400 #621 260/264 RPM RANGE 2600-6800 #609 277/284 RPM RANGE 3200-7200 #608 290/295 RPM RANGE 4000-7800 #604 301/310 RPM RANGE 4400-8200
JUN Auto Works
JUN Auto Works
JUN high-lift camshafts 1004M-N001 68/272 duration/advertised duration 1004M-N002 72/288 1004M-N003 74/296 6.5 lift 1004M-N004 74/296 7.2 lift 1004M-N005 76/304 1004M-N006 80/320 1004M-N007 82/328
Auckland Cams
Auckland Cams
Auckland Cams sample grinds 157a 188/188 standard grind 157 188/196 Smooth idle Mini-stock 10 202/206 Good idle increased low RPM power 563 212/203 Good idle increase midrange, needs exhaust changes 561 221/221 Moderate idle increase midrange with springs & carb 53 224/224 Slightly lopey 3000-6500 RPM 59 234/234 Lopey idle 3500-6800 RPM 566 239/239 Lopey idle 4000-7000 RPM 158 243/243 Slightly rough idle 4000-7500 RPM 618 259/259 Rough idle 5000-8500 RPM
Wade Cams
Profile, Duration, lift #112 208 .411 Smooth idle, good torque 2000 - 5000 #104 212 .408 Smooth idle, good torque Mild porting, extractors #113 212 .379 Good idle, needs exhaust, low to midrange #240 220 .407 Needs springs, twin carbs, good midrange #446 228 .425 Increased midrange, needs springs 3000-6500 #1009a 230 .464 Needs springs, carbs, suit speedway #140 238 .432 Twin Weber carbs, springs 4000-7000 #176c 243 .470 Top end power, full mods 4000-7500
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 | ? | 240 | 240 | 12 | 48 | 10 | 50 | 29111 | |
| 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 |