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Revision as of 08:36, 14 January 2013

There are basically five factory camshaft grinds, from A10 to performance grinds.

1 Overview
2 Identification
3 Duration
4 Engine Size
5 Early vs. Late
6 Competition Camshaft
- 6.1 Nissan Competition Parts
7 Specs
- 7.1 Aftermarket Grinds
8 1974-up
9 1967-1973
10 Chart

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 104CB

JTS 140-6

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 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 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

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

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Camshaft Comparison