Classic Inlines
603 W Pecos Ave
Mesa, AZ 85210


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



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