Classic Inlines - Ford Small Inline Six Specs


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Classic Inlines
603 W Pecos Ave
Mesa, AZ 85210

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Small Six Specs - 144/170/200/250ci

Quick Links
General Specs	Casting #s	Comp Ratio	Piston & Rings	Cam Specs
Torque Specs	Fluid Types	Head Flow	Ignition Timing	Valve Train

For an in depth look at the Ford small six, engine-head-carb swaps, performance upgrades, and tranny swaps, we recommend purchasing the Falcon Six Handbook.

General Specs
YEAR	CI	Chamber	Intake	Exhaust	Log CC	Adv HP	Adv TQ
60-64	144	44-51	1.467	1.266	850	90	138
61-65	170	48-53	1.522	1.266	890	105	158
65-72	170	48-53	1.649	1.380	890	105	158
65-69	200	51-53	1.649	1.380	1100	120	190
69-71	200	62	1.649	1.380	1240	120	190
72-74	200	62	1.649	1.380	1240	85	154
77-80	200	62	1.750	1.380	1345	85	154
69-71	250	62	1.649	1.380	1240	155	240
72-74	250	62	1.649	1.380	1240	99	184
77-80	250	62	1.750	1.380	1345	99	184
80-up	250	62	1.750	1.380	1420	99	184
AU only	221	62	1.649	1.380	1345	unknown	unknown

Sizes and Dimensions
CI	Stroke	Bore Size	Bore Spacing	Main Diameter	Rod Diameter	Rod Length	Centerline to Deck	Piston Pin Height
144	2.500	3.5	?	2.2486	2.1236	4.855	?	?
170	2.940	3.5	?	2.2486	2.1236	4.715	?	?
200	3.126	3.68	4.08	2.2486	2.1236	4.715	7.808	1.511
250	3.910	3.68	4.08	2.3986	2.1236	5.880	9.469	1.511
221	3.460	3.68	4.08	2.3986	2.1236	5.130	?	1.511

Torque Specs
Torque	Rod Caps	Exhaust	Intake	Rockers	Sump	Plugs	V/C	Clutch
Foot LBS	24-26	20-24	16-18	34-36	8-10	12-14	8-10	32-36

Torque	Main	Head	Flywheel	Cam Gear	Trust Plate	Damper/Pulley
STEP 1	40-45	45-55	55-65	42-45	14-16	55 (144) 85-95 (other)
STEP 2	55-60	55-65	65-75	Water Pump	Oil Pump	Oil Pan	Drain Plug
STEP 3	65-70	65-75	75-85	14-16	12-15	8-10	18-20

Compression Ratio's			Ignition Timing			Miscellaneous
Engine	Static	Cranking	Engine	Manual	Auto	Firing Order: 1-5-3-6-2-4
144ci	7.5	165psi	144ci	4-6*	10*	Idle Speed: Standard 500-550
144ci	8.7	175psi	170ci	4-6*	10*	Idle Speed: Automatic 475-500
170-200	8.7	175psi	200ci	12*	12*	Deck Heights
221-250	8.2	170psi	221ci	6*	6*	200ci = 0.019
200-250	9.2	185psi	250ci	12*	12*	250ci = 0.123

Valve Train		Pistons & Rings
Valve Spring Free Length	1.795"	Compression Ring Gap	.015 + .005
Valve Spring Length - Closed	1.586-1.595	Oil Ring Gap	.020 + .030
Valve Spring Length - Open	1.222-1.225	Piston Pin Diameter	.9122
Valve Spring Load - Closed	50-55 lbs	Pin Compression Height	1.50
Valve Spring Load - Open	120-150 lbs	Dish Sizes	6.5cc & 13cc

Stock Camshaft Specs
Engine	Duration	Int Open	Int Close	Exh Open	Exh Close	Overlap	Valve Lift
144ci - solid	232	15	37	45	7	22	360
170ci - hyd	240	9	51	42	18	27	348
200ci - hyd	252/256	7	65	55	21	28	348
200ci - hyd	256	28	48	76	0	28	372
250ci - hyd	256	10	66	58	18	28	368

Fluid Types
Fluid	Engine Oil	Automatic Tranny	Manual Tranny	Rear Axle	Manual Steering	Power Steering	Ball Joints
Type	15W40	ATF Type F	SAE 80/90	SAE 80/90	self level lithium	ATF Type F	high temp grease
Quantity	sump: 4 qt filter: 1 qt	9 qts	2 qts	3 pints	310 grams	3 pints	n/a

Small Six Casting Numbers
Years	Size	Block	Head	Crank	Notes
60-64	144ci	????	????	????
60-64	170ci	C0DE-C4DE	????	????
1965	200ci	C5DE-H	C5DE-B C6DE-A	1H	4 Bolt Bell
66-67	200ci	C6DE-A	C6DE-A C7DE-A	1H	6 Bolt Bell
68-69	200ci	C8DE-8	C6DE-A / C8DE-B C9DE-R / C9DE-M	1H	6 Bolt Bell
70-74	200ci	????	????	????	6 Bolt Bell
75-80	200ci	D8BE-GE E1BE-FA	D5DE-BA	1H	6 Bolt Bell
81-83	200ci	E1BE-BB	E0BE-BB E1BE-CC	3H	Big Bell
69-74	250ci	C9DE-B D2DE-AA	C9OE-M	2H	SBF Bell
75-80	250ci	D8BE-JA / 8DE-CC D7DE-CA /D6DE-CA D5DE-AA	E0BE-BB / D5DE-BA D7BE-AB / D3BE-AA D8BE-BA / C9OE-M_	3HA	SBF Bell
The first two digits were the production year, the second two digits were the model. The first digit (always a letter) was for the decade - C=60's - D=70's - E=80's The second digit (always a number), was the production year. For example: C3 is 1963 - C6 is 1966 - D7 is 1977 - E0 is 1980 - E2 is 1982

Cylinder Head Flow Ratings
Intake	Valve Lift / Flow
Intake	.100	.200	.300	.400	.500	.600
Sml Log - Stock	41 cfm	68 cfm	79 cfm	90 cfm	99 cfm	101 cfm
Sml Log - Modified	47 cfm	87 cfm	97 cfm	110 cfm	114 cfm	116 cfm
Lrg Log - Stock	45 cfm	88 cfm	108 cfm	119 cfm	124 cfm	127 cfm
Lrg Log - Modified	52 cfm	94 cfm	126 cfm	140 cfm	145 cfm	146 cfm
250-2V - Stock	53 cfm	99 cfm	127 cfm	155 cfm	156 cfm	157 cfm
250-2V - Ported	54 cfm	105 cfm	135 cfm	163 cfm	172 cfm	176 cfm
CI Alum - Stock	52 cfm	101 cfm	143 cfm	180 cfm	201 cfm	210 cfm
CI Alum - Ported	55 cfm	106 cfm	159 cfm	197 cfm	223 cfm	231 cfm
NOTE: The Stock Small Log Intake numbers are not actual figures, they are estimated.

Exhaust	Valve Lift / Flow
Exhaust	.100	.200	.300	.400	.500	.600
Sml Log - Stock	36 cfm	68 cfm	89 cfm	98 cfm	103 cfm	105 cfm
Sml Log - Modified	42 cfm	69 cfm	91 cfm	101 cfm	108 cfm	110 cfm
Lrg Log - Stock	41 cfm	55 cfm	74 cfm	93 cfm	103 cfm	105 cfm
Lrg Log - Modified	44 cfm	72 cfm	92 cfm	109 cfm	122 cfm	129 cfm
250-2V - Stock	42 cfm	58 cfm	76 cfm	94 cfm	102 cfm	105 cfm
250-2V - Ported	45 cfm	76 cfm	92 cfm	107 cfm	119 cfm	126 cfm
CI Alum - Stock	40 cfm	79 cfm	111 cfm	144 cfm	164 cfm	174 cfm
CI Alum - Ported	44 cfm	87 cfm	122 cfm	159 cfm	179 cfm	184 cfm

For more information, see our tech article "Flow Testing the Log Cylinder Heads".

Cylinder Head Bolt Torque Sequence

Hydraulic Lifter Assembly

Valve Train Assembly

Small Six Identification, Small Six Q&A, and Trouble Shooting