During it's thirteen year lifespan in the Z series, The L Series motors came with many different Cam shafts. Below is a Chart to help you locate your Camshaft Specifications along with some After market Specs.

• Stock
• Colt Cams
• Crane Cams
• Integral Cams
• Isky Cams
• JWT Jim Wolf Tech
• Schneider Cams
• Web Cams

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	Automatic 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
Degree BTC Intake Opens	16	20	16	16	12	12	16	22
Degrees 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 Exhust Opens	54	58	54	58	54	52	54	54
ATC Exhust Closes	14	18	14	10	14	8	6	6
Exhust 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 Exhust	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 SEPERATION

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

For more information on these cams Please contact the following:

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.

(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 Hyd Cyl 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 Number	New Cam Part Number	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