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Old 12-22-2007, 04:58 PM   #1
clyde004
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Default In-Depth F and H-Series Motor Specs

I believe that this information would be very beneficial to those trying to buy parts for internal builds, head swaps, etc...for example, those looking for rods for the F22B1 and can't find them...but can find rods for the more popular H23 models...they actually have the same specs!

Information courtesy of the Honda-Tech Forums (www.honda-tech.com)....

Block Specs:

Engine
Block Type
Deck Height
Bore
F20A
Open Deck
219.5mm/8.643
85mm/3.346
F20B
Open Deck
219.5mm/8.643
85mm/3.346
F22A
Open Deck219.5mm/8.643
85mm/3.346
F22B
Open Deck219.5mm/8.643
85mm/3.346
F22B1
Open Deck
219.5mm/8.643
85mm/3.346
F22B2
Open Deck
219.5mm/8.643
85mm/3.346
F23A
Open Deck
219.5mm/8.643
86mm/3.385
H22A
Closed Deck
219.5mm/8.643
87mm/3.425
H22A1
Closed Deck
219.5mm/8.643
87mm/3.425
H22A4
Open Deck
219.5mm/8.643
87mm/3.425
H23A
Open Deck
219.5mm/8.643
87mm/3.425
H23A1
Closed Deck
219.5mm/8.643
87mm/3.425


Rod Specs:

Engine
Rod Length
Rod WidthMain Bore
Pin Bore
F20A
145.0mm/5.709
23.75mm/0.935
???
21.97-21.98mm/.8649-.8654
F20B
145.0mm/5.709
23.75mm/0.935
48.00mm/1.890
21.97-21.98mm/.8649-.8654
F22A
141.5mm/5.572
23.75mm/0.935
51.00mm/2.008
21.97-21.98mm/.8649-.8654
F22B
141.5mm/5.572
23.75mm/0.935
51.00mm/2.008
21.97-21.98mm/.8649-.8654
F22B1
141.5mm/5.572
23.75mm/0.935
51.00mm/2.008
21.97-21.98mm/.8649-.8654
F22B2
141.5mm/5.572
23.75mm/0.935
51.00mm/2.008
21.97-21.98mm/.8649-.8654
F23A
141.0mm/5.551
19.81mm/0.780
48.00mm/2.008
21.97-21.98mm/.8649-.8654
H22A
143.0mm/5.633
23.75mm/0.935
51.00mm/2.008
21.97-21.98mm/.8649-.8654
H22A1
143.0mm/5.633
23.75mm/0.935
51.00mm/2.008
21.97-21.98mm/.8649-.8654
H22A4143.0mm/5.633
23.75mm/0.935
51.00mm/2.008
21.97-21.98mm/.8649-.8654
H23A
141.5mm/5.572
23.75mm/0.935
51.00mm/2.008
21.97-21.98mm/.8649-.8654
H23A1
141.5mm/5.572
23.75mm/0.935
51.00mm/2.008
21.97-21.98mm/.8649-.8654


Piston Specs:

Engine
Bore
Compression Height
Piston Volume
Wrist Pin Diameter
F20A
85mm/3.346???
-4.7 cc
22.0mm/.866
F20B
85mm/3.34631.0mm/1.221
+8.0 cc
22.0mm/.866
F22A
85mm/3.34630.5mm/1.203-14.5 cc
22.0mm/.866
F22B
85mm/3.34630.5mm/1.203-11.2 cc
22.0mm/.866
F22B1
85mm/3.34630.5mm/1.203-14.5 cc
22.0mm/.866
F22B2
85mm/3.34630.5mm/1.203-14.5 cc
22.0mm/.866
F23A
86mm/3.38530.0mm/1.181
-18.0 cc
22.0mm/.866
H22A
87mm/3.42531.0mm/1.221-1.9 cc
22.0mm/.866
H22A1
87mm/3.42531.0mm/1.221+4.2 cc
22.0mm/.866
H22A487mm/3.42531.0mm/1.221-1.8 cc
22.0mm/.866
H22A Type S87mm/3.425
31.0mm/1.221
+4.2 cc
22.0mm/.866 
H23A
87mm/3.42530.5mm/1.203
-1.8 cc
22.0mm/.866
H23A1
87mm/3.42530.5mm/1.203+4.3 cc
22.0mm/.866


Crankshaft Specs:

Engine
Stroke
Main Journal Diameter
Rod Journal Diameter
F20A
88.0mm/3.464
50mm
47.95mm/1.888
F20B
88.0mm/3.464
55mm
44.98mm/1.771
F22A
95.0mm/3.740
50mm
47.95mm/1.888
F22B
95.0mm/3.74050mm
47.95mm/1.888
F22B1
95.0mm/3.74050mm
47.95mm/1.888
F22B2
95.0mm/3.74050mm
47.95mm/1.888
F23A
97.0mm/3.818
55mm
44.98mm/1.771
H22A
90.7mm/3.57050mm
47.95mm/1.888
H22A1
90.7mm/3.57050mm
47.95mm/1.888
H22A4
90.7mm/3.57050mm (1997), 55mm (98-01)
47.95mm/1.888
H23A
95.0mm/3.740
55mm
47.95mm/1.888
H23A1
95.0mm/3.740
50mm
47.95mm/1.888


Cylinder Head Specs:

Engine
Head Volume
Intake Valve Diameter
Exhaust Valve Diameter
F20A
50.0 cc
34mm/1.3429mm/1.14
F20B
???
34mm/1.3429mm/1.14
F22A
50.5 cc
34mm/1.3429mm/1.14
F22B
50.5 cc
34mm/1.3429mm/1.14
F22B1
50.6 cc
34mm/1.3429mm/1.14
F22B2
50.6 cc
34mm/1.3429mm/1.14
F23A
???
34mm/1.3429mm/1.14
H22A
53.8 cc
35mm/1.38
30mm/1.18
H22A1
53.8 cc
35mm/1.3830mm/1.18
H22A453.8 cc
35mm/1.3830mm/1.18
H23A
53.8 cc
35mm/1.3830mm/1.18
H23A1
50.0 cc
34mm/1.34
29mm/1.14


Head Gasket Specs:

*Note: Gasket thickness measured after crush

Engine
Bore
Thickness
F20A
85.5mm/3.37
0.66mm/.026
F20B
85.5mm/3.370.66mm/.026
F22A
85.5mm/3.370.66mm/.026
F22B
85.5mm/3.370.66mm/.026
F22B1
85.5mm/3.370.66mm/.026
F22B2
85.5mm/3.370.66mm/.026
F23A
86.5mm/3.41
0.66mm/.026
H22A
88.0mm/3.46
0.66mm/.026
H22A1
88.0mm/3.460.66mm/.026
H22A4
88.0mm/3.460.66mm/.026
H23A
88.0mm/3.460.66mm/.026
H23A1
88.0mm/3.460.66mm/.026


Bearing Specs:

Bearing Color
Main Bearing Thickness
Rod Bearing Thickness
Black
2.010-2.007mm/0.0791-0.07901.507-1.504mm/0.0593-0.0592
Blue 2.013-2.010mm/0.0793-0.07911.510-1.507mm/0.0594-0.0593
Brown
2.007-2.004mm/0.0790-0.07891.504-1.501mm/0.0592-0.0591
Green
2.004-2.001mm/0.0789-0.07881.501-1.498mm/0.0591-0.0590
Pink
1.998-1.995mm/0.0787-0.07851.495-1.492mm/0.0589-0.0587
Red
1.995-1.992mm/0.0785-0.07831.492-1.489mm/0.0587-0.0586
Yellow
2.001-1.998mm/0.0788-0.07871.498-1.495mm/0.0590-0.0589


Engine
Main Bearing Width
Rod Bearing Width
F20A
19.9mm/.784
19.35mm/.762
F20B
19.9mm/.78419.35mm/.762
F22A
19.9mm/.78419.35mm/.762
F22B
19.9mm/.78419.35mm/.762
F22B1
19.9mm/.78419.35mm/.762
F22B2
19.9mm/.78419.35mm/.762
F23A
19.9mm/.78415.47mm/.609
H22A
19.9mm/.78419.35mm/.762
H22A1
19.9mm/.78419.35mm/.762
H22A4
19.9mm/.78419.35mm/.762
H23A
19.9mm/.78419.35mm/.762
H23A1
19.9mm/.78419.35mm/.762


Now all we need is some type of displacement calculator or theorem for calculating displacement with mixed specs...such as my F23 block with an F22B1 head! You'd think that there should be some way of calculating that information with all of these factory specs...
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Last edited by 94accordex; 12-28-2007 at 07:39 PM. Reason: Added additional formatting
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