LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Lt1 Bored .060 over

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Old 12-08-2005, 12:12 PM
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Default Lt1 Bored .060 over

Is it possibile to bore a lt1 motor (4bolt main) to 4.060 (.060) over with a 3.875 Stroke

If so would it last, and what would the displacement be

(how is displacment caculated through bore and stroke)

Thank you.
Old 12-08-2005, 12:53 PM
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Originally Posted by TonyP187
Is it possibile to bore a lt1 motor (4bolt main) to 4.060 (.060) over with a 3.875 Stroke

If so would it last, and what would the displacement be

(how is displacment caculated through bore and stroke)

Thank you.
It'd be about a 401 ci motor and your cylinder walls would be paper thin (not that thick to begin with) so concrete is not an option, but a must have. Depending on the motor's use I'd just start with a fresh block.
Old 12-08-2005, 01:33 PM
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Displacement is:

Bore squared x Stroke x 1/4 pi x # Cylinders

Example using your engine specs:

4.060 x 4.060 x 3.875 x .7853982 (1/4 pi) x 8

Which comes out to 401.33188285512 or, more simply, 401.3 ci.
Old 12-10-2005, 09:57 PM
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I have a 401 CI LT-1. Its a .60 over 93 LT-1 block that has been cemented. No problems here with distortion or cooling. It actually runs cooler than my 396 did.
Old 12-12-2005, 11:04 AM
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What is cemented? And could I have it sleeved? Im really intrested in doing someting a little different



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