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S30 Camshaft Specifications

L-Series Camshaft Specifications

During its thirteen-year lifespan in the Z series, the L Series motors came with a variety of camshafts. The chart below will help you identify your camshaft specifications, including some common aftermarket options.

Stock Specs

Engine	L24	L26	L28 L28E	L28E	L28ET	L28ET	L28ET	L24E
Head	E31/E88	E88	N42/N47, P79	P79	P90	P90	P90A	N47
Cam Mark	A	C	A	F	B	J	M	E
Applied Date	All	All	Before 8/81	9/81 and After	Auto Before 7/82	Manual Before 7/82	All after 8/82	All
Part # 13001-XXXXX	E4126	N3626	E4126	P7980	P3026	P9580	P9980	S6280
Intake Duration	248	256	248	240	240	240	240	240
Deg BTC Intake Opens	16	20	16	16	12	12	16	22
Deg ABC Intake Closes	52	56	52	44	48	48	44	38
Int Center Angle	18	18	18	14	18	18	14	8
Exhaust Duration	248	256	248	248	248	240	240	240
BBC Exhaust Opens	54	58	54	58	54	52	54	54
ATC Exhaust Closes	14	18	14	10	14	8	6	6
Exhaust Center Angle	20	20	20	24	20	22	24	24
Lobe Centers	109	109	109	109	109	110	109	106
Cam Lift Intake	0.289	0.276	0.289	0.276	0.276	0.276	0.266	0.276
Cam Lift Exhaust	0.289	0.289	0.289	0.289	0.289	0.276	0.264	0.276
Valve Lift Intake	0.413	0.394	0.413	0.394	0.394	0.394	0.378	0.394
Valve Lift Exhaust	0.409	0.409	0.409	0.409	0.409	0.39	0.374	0.39

Aftermarket cams

There are many different Manufactures that are making new or Regrind cams for the L-Series motors. Below you will find some of these cams and their specifications.

Colt Cams

ID NUMBER	?	DURATION		CAM LIFT	VALVE LIFT	LOBE SEP.	DESCRIPTION
		@.050	ADV.
C.556.S	INTAKE	213?	266?	.312	.468	109	MILD PERFORMANCE
	EXHAUST	213?	266?	.312	.468		No caps or springs required
C.540.S	INTAKE	205?	256?	.327	.491	109	MILD PERFORMANCE
	EXHAUST	205?	256?	.327	.491		? GOOD WITH AUTO & F.I ?
C.542.S.	INTAKE	224?	280?	.340	.510	108	PERFORMANCE
	EXHAUST	224?	280?	.340	.510		Best all around Cam 3000-6500+
C.557.S	INTAKE	238?	292?	.320	.480	108	STREET STRIP
	EXHAUST	238?	292?	.320	.480		3500 - 7000
C.543.S	INTAKE	243?	304?	.350	.525	109	RACE - OVAL TRACK
	EXHAUST	243?	304?	.350	.525		STRONG - 4000 - 7500+
C.575.S	INTAKE	243?	308?	.380	.570	108	RACE - OVAL TRACK
	EXHAUST	243?	308?	.380	.570		4500 + UP

PLEASE NOTE: ALL PROFILES FROM C.540.S + UP REQUIRE CAPS AND SPRINGS

F.I. WILL WORK WITH C.542.S WITH HIGHER COMPRESSION AND A WIDER LOBE SEPARATION

Integral Cams

The stage 1L - 2L performance cams are designed to work with the stock valve springs to 7000 RPM. The stage 3 - 4 road race cams require performance valve springs.

All profiles are available on new Chilled Cast Iron Billets. When ordering, specify if you want a solid core billet (external oiling) or a rifle drilled billet (internal oiling). You can also specify a different lobe separation angle for no extra charge.

Profile	Seat Duration	.050" Duration	Gross Valve Lift	Lobe Separation
Stage 1L street	280?	232?	.450"	110?
Stage 2L street	285?	237?	.450"	110?
Stage 3 race	300? I / 290? E	262? I / 253? E	.535" I / .515" E	104?
Stage 4 race	310? I / 300? E	271? I / 262? E	.555" I / .535" E	104?

For more information on these cams, please contact:

Integral Cams, LLC

[(507) 645-9308](tel:5076459308)

Motorsport Auto

The cams offered by Motorsport Auto are quality pieces with cam profiles designed specifically for a Z's requirements.

Note: All cams are measured at .050" lash.

Part #	Intake Lift	Exhaust Lift	Intake Duration	Exhaust Duration	Description
10-2001	.460	.460	260	260	Stage I, 70-83 Z/ZX Non Turbo
10-2002	.480	.480	274	274	Stage II, 70-83 Z/ZX Non Turbo
10-2003	.460	.460	270	280	Stage III, 70-83 Z/ZX Non Turbo
10-2004	.495	.495	290	290	Stage IV, 70-83 Z/ZX Non Turbo
10-2005	.560	.560	300	300	Stage V, 70-83 Z/ZX Non Turbo
10-2006	.620	.624	304	318	Stage VI, 70-83 Z/ZX Non Turbo
10-0921	.460	.440	260	250	Turbo Stage I, 81-82 280ZX Turbo
10-0923	.460	.440	260	250	Turbo Stage I, 83 280ZX Turbo
10-0922	.460	.460	270	260	Turbo Stage II, 81-82 280ZX Turbo
10-0924	.460	.460	270	260	Turbo Stage II, 83 280ZX Turbo

(JWT) Jim Wolf Technology

Part Number	Intake Lift	Exhaust Lift	Intake Duration	Exhaust Duration	Lobe Sep.
A280Z-00C1M	.475"	.475"	256	256	112

NOTE: Duration measured @ .010. Also, not to be used in '83 P90a Hydraulic Cylinder heads.

Crane Cams

Part Number	Advertised Duration Intake / Exhaust	Duration @ .050 Intake / Exhaust	Lift Intake / Exhaust	Lobe Separation	Description
DA-282-2-10	282 / 292	236 / 246	.450 / .450	110	Fair idle. Good mid range. Compression ratio required 10.5-12:1.

Schneider Cams

Part #	Intake Duration (ADV)	Exhaust Duration (ADV)	Intake Duration (.050")	Exhaust Duration (.050")	Intake Valve Lift	Exhaust Valve Lift	Lobe Separation
17030	260	260	220	220	.460	.460	107
17032	260	270	220	230	.460	.460	107
17033	274	274	215	215	.480	.480	107
17034	270	280	232	240	.460	.460	107
17035	284	294	240	244	.480	.480	107
17036	290	290	244	244	.495	.495	106
17038	300	300	256	256	.560	.560	106
17039	304	318	268	272	.620	.624	104
17040	314	314	268	268	.592	.592	106
17042	260	250	220	210	.460"	.460"	114
17043	270	260	230	220	.460"	.460"	114
17044	284	270	238	238	.488"	.488"	114

Part numbers 17042, 17043, 17044 are Turbo Grinds.

Web Cams

Duration (ADV)	Duration @ 0.050"	Valve Lift	Regrind Part #	New Cam Part #	Description
248°/248°	230°/230°	.430" / .430"	20-000	20-002	Offers improved mid range and top end, for use in stock or modified engines. Lash caps required.
260°/260°	238°/238°	.450" / .450"	20-050	20-052	Strong mid and top end power for street / strip. Lash caps required.
252°/252°	230°/230°	.488" / .488"	20-010	20-012	Very broad power band, good all around cam. Requires performance valve springs and lash caps.
262°/262°	240°/240°	.488" / .488"	20-020	20-022	Good mid range and top end power for hot street cars with modified engines. Lash caps required.
266°/266°	246°/246°	.510" / .510"	N/A	20-032	Strong mid range and top end power for rally and off-road racing engines. Lash caps required.
304°/304°	284°/284°	.585" / .585"	N/A	20-042	Special racing profile. Tremendous top end power. Competition use only! Lash caps required.

ISKY Cams

240/260 Part #	280 Part #	Valve Lift	Advertised Duration	Duration @ .050"	Description
715147	718147	.475"	270	222	Stage I
715148	718148	.480"	280	232	Stage II
715149	718149	.490"	290	242	Stage III
715196	718196	.530"	306	264	Competition?
715127	718127	.595"	306	274	Competition

Comp Cams

Part Number	Adv Duration Intake / Exhaust	Duration @ .050 Intake / Exhaust	Valve Lift Intake / Exhaust	Lobe Sep	Description
84-115-4	240 / 240	194 / 194	.400" / .400"	110	Good OEM Replacement
84-119-4	252 / 252	204 / 204	.410" / .410"	110	Better Torque & Power than OEM Cam. Smooth Idle
84-123-4	260 / 260	214 / 214	.420" / .420"	110	Street Performance. Wide Power band. Smooth Idle
84-131-4	280 / 280	236 / 236	.460" / .460"	110	Serious Street or mild Race Cam. Strong Mid Range and Good Top end.
84-135-4	292 / 292	246 / 246	.480" / .480"	110	Serous Road Race cam. Strong top end.

Sources Used

• 1970-1983 Datsun 240z-260z-280z-280zx Factory Service Manuals
• ISKY CAMS
• WEB CAMS
• SCHNEIDER CAMS
• CRANE CAMS
• JIM WOLF TECHNOLOGY
• MOTORSPORT AUTO
• INTEGRAL CAMS
• COLT CAMS