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home » cylinder heads » chev big block
MERLIN RECTANGULAR PORT
- Cast iron cylinder heads
- Intake valve 2.190
- Exhaust valve 1.880
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Valve lift
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.100”
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.200”
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.300”
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.400”
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.500”
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.550”
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.600”
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.650”
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.700”
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.750”
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Intake c.f.m.
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80
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153
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214
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253
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303
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320
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334
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342
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354
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361
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E xhaust c.f.m
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72
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121
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163
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202
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233
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242
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250
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256
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263
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265
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GM BOWTIE
- Alloy cylinder head
- Intake valve 2.300 exhaust valve 1.94
- 219cc intake port volume
- 89cc exhaust port volume
- 68cc chamber volume
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Valve lift
|
.100”
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.200”
|
.300”
|
.400”
|
.500”
|
.550”
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.600”
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.650”
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.700”
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Intake c.f.m.
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72
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145
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206
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250
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270
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280
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288
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294
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397
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E xhaust c.f.m
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57
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105
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142
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167
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190
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197
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202
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210
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215
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