|
| |
Small Block Head Flow Comparison
| Intake Valve |
| |
Valve Diameter
|
Valve Lifts
|
| |
|
.100 |
.200 |
.300 |
.400 |
.500 |
.600 |
| 289 |
1.78 |
44.9 |
91.2 |
132.5 |
154.5 |
168.0 |
166.5 |
| 289 Hi-Pro |
1.78 |
55.3 |
98.8 |
139.5 |
160.5 |
169.5 |
177.0 |
| 351W |
1.84 |
58.7 |
105.6 |
152.0 |
171.0 |
181.5 |
189.0 |
| 351C 2V |
2.03 |
68.5 |
142.2 |
189.0 |
199.5 |
196.5 |
198.0 |
| 351C 4V |
2.19 |
64.3 |
115.8 |
163.5 |
210.0 |
246.0 |
273.6 |
| GT-40 |
1.94 |
65.2 |
126.7 |
172.5 |
202.5 |
216.0 |
214.8 |
| Victor Jr. |
2.05 |
63.8 |
127.3 |
177.0 |
229.2 |
268.8 |
288.0 |
| Exhaust Valve |
| |
Valve Diameter |
Valuve Lift |
| |
|
.100 |
.200 |
.300 |
.400 |
.500 |
.600 |
| 289 |
1.45 |
41.0 |
71.6 |
95.1 |
110.7 |
120.1 |
124.8 |
| 298 Hi-Pro |
1.45 |
41.4 |
71.9 |
98.2 |
112.6 |
121.0 |
125.1 |
| 351W |
1.54 |
51.8 |
90.4 |
106.8 |
112.9 |
114.8 |
115.4 |
| 351C 2V |
1.67 |
57.2 |
89.7 |
120.2 |
143.5 |
159.6 |
162.7 |
| 351C 4V |
1.67 |
66.7 |
103.7 |
133.8 |
154.4 |
169.0 |
178.4 |
| GT-40 |
4.54 |
52.7 |
105.3 |
145.3 |
149.4 |
149.1 |
149.1 |
| Victor Jr. |
1.60 |
54.1 |
106.8 |
151.6 |
181.5 |
205.0 |
217.5 |
Ford
Casting Numbers Explained
Big Block
Ford Heads
|
