Camshaft Comparison

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Category: Camshaft

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Revision as of 05:45, 23 August 2009 ddgonzal (Talk | contribs) (->Early vs. Late) <- Previous diff		Revision as of 06:51, 23 August 2009 ddgonzal (Talk | contribs) Next diff ->
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	[[Category:Camshaft]]		[[Category:Camshaft]]
-	There are basically four factory camshaft grinds:	+	There are basically five factory camshaft grinds:
	* small bore grind		* small bore grind
	* large bore grind		* large bore grind
-	* performance grind, used in GX, Twin-carb, and EFI engines	+	* GX grind
-	* emission grind, used in 1981-1982 USA engines	+	* Performance grind for 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.		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.
		+
	= Duration =		= Duration =
Line 15:		Line 17:
	For 1974, the A-series engine was [[A Engine Redesign|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.		For 1974, the A-series engine was [[A Engine Redesign|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: 1974-up competition cam<br>[http://datsun1200.com/modules/myalbum/photo.php?lid=20182 http://ddgonzal.members.winisp.net/getThumb.aspx?width=400&uri=http://datsun1200.com/uploads/photos/20182.jpg]<br>Bottom: 1967-1973 camshaft	+	Top: July 1974-up camshaft<br>[http://datsun1200.com/modules/myalbum/photo.php?lid=20185 http://ddgonzal.members.winisp.net/getThumb.aspx?width=400&uri=http://datsun1200.com/uploads/photos/20185.jpg]<br>Bottom: 1967-1973 June camshaft
	[http://datsun1200.com/modules/myalbum/photo.php?lid=19482 http://datsun1200.com/uploads/thumbs/19482.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=14560 http://datsun1200.com/uploads/thumbs/14560.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=11183 http://datsun1200.com/uploads/thumbs/11183.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=2980 http://datsun1200.com/uploads/thumbs/2980.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=9024 http://datsun1200.com/uploads/thumbs/9024.jpg]		[http://datsun1200.com/modules/myalbum/photo.php?lid=19482 http://datsun1200.com/uploads/thumbs/19482.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=14560 http://datsun1200.com/uploads/thumbs/14560.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=11183 http://datsun1200.com/uploads/thumbs/11183.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=2980 http://datsun1200.com/uploads/thumbs/2980.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=9024 http://datsun1200.com/uploads/thumbs/9024.jpg]
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		+	= 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<br>[http://datsun1200.com/modules/myalbum/photo.php?lid=20182 http://ddgonzal.members.winisp.net/getThumb.aspx?width=400&uri=http://datsun1200.com/uploads/photos/20182.jpg]<br>Bottom: Early cam
		+
	= Specs =		= Specs =

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Revision as of 06:51, 23 August 2009

There are basically five factory camshaft grinds:

• small bore grind
• large bore grind
• GX grind
• Performance grind for 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.

Contents 1 Duration 2 Early vs. Late 3 Competition Camshaft 4 Specs 5 1974-up 6 1967-1973 7 Chart

Duration

"Advertised Duration" means you should only compare these numbers with grinds from the same manufacturer. Other vendors may measure it differently.

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

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

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

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