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1971 Chevelle Coil/Distributor/Ignition Timing Specifications

Data are from GM's Information Kit. For other 1971 Chevelle distributors see my distributors page.

	250 155hp	307 200hp	350 245hp
Ignition Coil	1115208	1115293	1115293
Breaker Gap	.019	0.19	.019
Cam Angle	31-34	29-31	29-31
Breaker Arm Tension	19-23	19-23	28-32
Distributor	1110489	1112005 - Manual 1112039 - Automatic	1112042 - Manual 1112005 - Automatic
Timing (Degree at BTDC @ RPM)	4° @ 550	4° @ 600 - Manual 8° @ 550 - Automatic	2° @ 600 - Manual 8° @ 550 - Automatic
Max	24° @ 1400	24° @ 4300 - Manual 20° @ 4200 - Automatic	28° @ 4300 - Manual 24° @ 4300 - Automatic

	350 270hp	402 300hp	454 365hp	454⁽¹⁾ 425hp
Ignition Coil	1115293	1115293	1115293	1115293
Breaker Gap	.019	0.19	.019	.019
Cam Angle	29-31	28-30	28-30	28-30
Breaker Arm Tension	19-23	19-23	19-23	19-23
Distributor	1112044 - Manual 1112045 - Automatic	1112057	1112052	1112075 - Manual 1111054 - Automatic
Timing (Degree at BTDC @ RPM)	4° @ 600 - Manual 8° @ 550 - Automatic	8° @ 600 - Manual 8° @ 600 - Automatic	8° @ 600 - Manual 8° @ 600 - Automatic	4° @ 700 - Manual 12° @ 700 - Automatic
Max	22° @ 4200 - Manual 18° @ 4200 - Automatic	30° @ 4400	22° @ 3900	32° @ 5000 - Manual 28° @ 5000 - Automatic

⁽¹⁾ The 454/425hp engine was never released to the public in a 1971 Chevelle
Neither the L78 nor the LS6 is shown in GM's Information Kit.

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Want more in-depth information on 1964-1972 Chevelles? My Facts and SS Guide program CD, my Shop Manuals & Parts Catalog program DVD, and my 1964-1972 Trim Tag and Warranty Card program CD. Check them and other informative program CDs at my https://chevellecd.net website.

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