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356 Tune-up Specifications

May 23, 2013 · Reference

The basic tune-up specifications for the Porsche 356 A, B and C and the early 912: valve clearances, then ignition settings.

Valve clearances

Year	Model	Intake	Exhaust
1955-1963	356 A/B, 1600	0.004	0.006
	356 A/B, 1600 S	0.004	0.006
1960-1963	356 B, S90	0.006	0.004
1963-1965	356 C	0.004	0.006
	356 SC	0.006	0.004
1966-1967	912	0.004	0.006
1968-1969	912	0.004	0.006

Ignition

Year	Model	Plug gap	Point gap	Dwell (deg.)	Firing order	Timing at	Idle rpm
1955-1963	356 A/B, 1600	.024 to .028	0.016	47-53	1432	5 BTDC	800
	356 A/B, 1600 S	.024 to .028	0.016	47-53	1432	5 BTDC	900
1960-1963	356 B, S90	.024 to .028	0.016	47-53	1432	3 BTDC	900
1963-1965	356 C	.024 to .028	0.016	47-53	1432	5 BTDC	900
	356 SC	.024 to .028	0.016	47-53	1432	3 BTDC	900
1966-1967	912	.024 to .028	0.016	47-53	1432	3 BTDC	900
1968-1969	912	.024 to .028	0.016	47-53	1432	3 ATDC	900

Porsche 356 Body and Engine ID Numbers Porsche Part Numbers: A Brief Introduction

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