| Pontiac heads flow numbers |
Friday, July 30, 2010
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HEAD |
.100" |
.150" |
.200" |
.250" |
.300" |
.350" |
.400" |
.450" |
.500" |
.550" |
.600" |
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1970 RAIV #614 Intake |
80 |
110 |
136 |
162 |
189 |
213 |
233 |
248 |
256 |
242 |
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1970 RAIV #614 Exhaust |
54 |
79 |
101 |
121 |
139 |
162 |
180 |
195 |
205 |
213 |
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1977 6X-8 Clean up
Intake |
81 |
114 |
142 |
160 |
181 |
196 |
203 |
203 |
204 |
204 |
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1977 6X-8 Clean up
Exhaust |
49 |
74 |
95 |
112 |
124 |
132 |
140 |
146 |
151 |
155 |
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1977 6X-8
Intake |
82 |
116 |
144 |
159 |
175 |
188 |
196 |
201 |
203 |
203 |
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1977 6X-8
Exhaust |
51 |
76 |
96 |
108 |
115 |
121 |
125 |
129 |
131 |
132 |
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1977 6X-4
Intake |
83 |
119 |
148 |
167 |
182 |
194 |
202 |
208 |
211 |
211 |
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1977 6X-4
Exhaust |
48 |
74 |
99 |
115 |
126 |
132 |
137 |
140 |
141 |
142 |
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1975 400 5C
Intake |
84 |
118 |
143 |
158 |
178 |
192 |
204 |
207 |
208 |
209 |
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1975 400 5C
Exhaust |
51 |
80 |
105 |
119 |
130 |
139 |
146 |
152 |
156 |
164 |
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1972 455 HO
Intake |
80 |
123 |
157 |
184 |
201 |
215 |
226 |
231 |
232 |
233 |
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1972 455 HO
Exhaust |
63 |
92 |
112 |
128 |
140 |
150 |
162 |
169 |
174 |
178 |
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KRE 290 Int.
KREs #s |
81 |
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154 |
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215 |
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246 |
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267 |
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286 |
KRE 290 Ex.
KREs #s |
48 |
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112 |
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160 |
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203 |
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230 |
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242 |
KRE 290 Int.
our #s |
77 |
109 |
141 |
177 |
209 |
234 |
258 |
275 |
281 |
284 |
287 |
KRE 290 Ex.
Our #s |
66 |
95 |
118 |
136 |
155 |
171 |
176 |
183 |
189 |
195 |
202 |
KRE 260 Int.
as cast |
79 |
114 |
148 |
180 |
209 |
229 |
241 |
246 |
248 |
248 |
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KRE 260 Ex.
as cast |
61 |
96 |
116 |
132 |
167 |
164 |
174 |
182 |
188 |
194 |
199 |
KRE 260 Int.
cleaned up |
78 |
114 |
147 |
180 |
211 |
230 |
246 |
252 |
256 |
258 |
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Flow numbers were obtained using 4.250” bore.
Stock heads / stock valvesflowed @ 28" H2O
6X-8 cleaned up heads are unaltered ports. Just castingflash and machined to cast smoothed.
RAIV heads were not stock.They had been previouslyported by unknown person.
KRE 290 heads were flowed @ 28" H2O valve sizes are 2.11", 1.66" Ferrea 6000 series SS valves the difference in exhaust flow #'s between KRE and us could be KRE perhaps used an exhaust pipe.
KRE 260 heads flowed @ 28" H2O 2.11", 1.66" Ferrea 5000 series valves intake ports were simply cleaned up by smoothing all machining and casting flash exhaust ports were not touched
All flow testing was performed by Panaritis Automotive on a SuperFlow SF-600FC flowbench |
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