Bore Question

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Mar 19, 2007 | 09:48 PM

AdamW

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From: Marshfield, WI

Hey, i heard recently that 1mm of bore = 40 over

is this true or no?

Mar 19, 2007 | 09:59 PM

landshark16

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Vehicle: 2000 Hyundai Tiburon

That is true but its not exact.

.040 or "40 over" = 1.024mm

So the answer is yes.

Mar 19, 2007 | 10:00 PM

AdamW

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From: Marshfield, WI

ok thanks a lot

Mar 19, 2007 | 10:17 PM

J3R0MY

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From: Hollywood, FL

pardon my retardation (slowness). but what does 40 over mean?

Mar 19, 2007 | 11:15 PM

AdamW

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From: Marshfield, WI

its a measure of the size u increase ur piston and ur block to accomodate the bigger piston.
..from what i understand

Mar 20, 2007 | 07:09 AM

rallyman

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From: Oakville, Ontario, Canada

Vehicle: 2006 Hyundai Sonata GL V6

"40 over" refers to boring out the cylinders in the engine block to 40 thousandths of an inch (0.040") over the stock bore.

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