Camshaft Comparison

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Category: Valvetrain

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Revision as of 08:28, 14 February 2015 ddgonzal (Talk | contribs) (->Competition Camshaft) <- Previous diff		Revision as of 03:31, 9 November 2015 ddgonzal (Talk | contribs) (->Duration) Next diff ->
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	= Duration =		= Duration =
	"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.
		+
		+	Nissan [http://datsun1200.com/modules/newbb/viewtopic.php?post_id=467289#forumpost467289 may measure the duration at 0.020 inch] lift. Many aftermarket companies measure it at 0.050 inch lift.
	= Engine Size =		= Engine Size =

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Revision as of 03:31, 9 November 2015

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

Contents 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 7.1.1 JTS 7.1.2 Camtech 7.1.3 JUN Auto Works 7.1.4 Auckland Cams 7.1.5 Wade Cams 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 emission)

Cam:	A10 (B10)	A12 (1973 USA)	A12GX
Part:	13001-18000	13001-H1000	13001-H2300
HP:	62hp@6000rpm	69hp@6000rpm	83hp@6400rpm
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.

Nissan may measure the duration at 0.020 inch lift. Many aftermarket companies measure it at 0.050 inch lift.

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 1981-up
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 Fuel pump eccentric was moved from #3 to #2 at the same time. (In the Older version, the oil pump gear also was used for the distributor)

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: 1974-up factory cam

Nissan Competition Parts

CAMSHAFTS & RELATED COMPONENTS (A-SERIES)
PART NO.	DESCRIPTION	QTY REQ.
* 13001-H2300 GX CAMSHAFT (.331"/256°)
  source: A12 GX Engine stock part
  For use in A-series engines built up to 6/73.
  Requires only new lifters for installation.
* 13001-H5700 GX CAMSHAFT (.331"/256°)
  source: Japan-market B210 A12T stock, B310 A14E stock
  20/62/65/35/12/15 lift 8.4, clearance .35
  For use in A-series engines built up to 6/73.
  Requires only new lifters for installation.
* 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
* 99996-H1030 Electramovive race camshaft .480 lift 300 duration
* 99996-H1031 ELECTRAMOTIVE RACE CAMSHAFT #1 .468"/300°
  cam is ground on 104° lobe centers. Requires use of competition valve
  springs, retainers and new 13231-78201 lifters
* 99996-H1032 ELECTRAMOTIVE RACE CAMSHAFT #2 .468"/310°
  Except for 310° duration all specifications and installation 
  requirements are the same as 99996-H1031.
* 99996-H1035 A12 race camshaft .480 lift 300 duration
* 13001-5741 CAMSHAFT BILLET

* 13231-78201 OVERSIZE CAM FOLLOWER Required when installing 
  either of the Electramotive race camshafts
* 99996-H1132 COMPETITION VALVE SPRING This inner and outer 
  spring assy should have an installed height of 1.61" and a seat
  pressure of 130 lbs/in.
  Requires the use of 99996-H1131.
* 99996-H1131 ALUMINUM VALVE SPRING RETAINER
  Requires use of 99996-H1132.

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, A15 worldwide 1981-]

  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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