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Big Chief minimum cylinder bore

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#1

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11-03-2009, 10:56 PM

bbc

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Big Chief minimum cylinder bore

What is the minimum cylinder bore allowable for use with a big chief?? The specs all state 4.5"-4.6". Can they be used with a 4.375" bore?

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#2

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11-04-2009, 03:33 PM

kevin@dart kevin@dart is offline

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We have a special 18 degree 381 program head that will work on a min. 4.375 bore

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#3

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11-15-2009, 04:27 PM

Awesome Bill Awesome Bill is offline

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If you do that, you will not see but maybe 40hp more @ best till around 8000rpm. Stroke, intake, cam etc will all play a big part as well as rpm.

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