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Old 06-30-2016, 07:14 PM   #1
jeffbcn
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261 head on a 235

I have a 235 built in 62 with a 261 head from 55 to 57. Compression test 150 in all six. Standard one barrel Rochester with stock intake and exhaust. Dragonfire electronic ignition, plugs gapped at .050.
What kind or horsepower would you guess in a 47 Thriftmaster?
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Old 06-30-2016, 09:22 PM   #2
dwcsr
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Re: 261 head on a 235

130 140
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Old 06-30-2016, 09:31 PM   #3
jeffbcn
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Re: 261 head on a 235

Thanx. I figured somewhere around there. Runs better than expected.
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Old 06-30-2016, 11:45 PM   #4
Mac the Yankee
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Re: 261 head on a 235

Keep your eye out for an 848 head if you want to get a bump in compression, as the 261 head is a pretty low compression head.
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Old 07-01-2016, 07:47 PM   #5
mr48chev
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Re: 261 head on a 235

150 lbs compression straight across on a 235 sounds pretty dog gone good to me.
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Old 07-01-2016, 10:08 PM   #6
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Re: 261 head on a 235

I thought so too.
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