Mr. Gasket 8703 Hot Rod Calculator - Manual (Page 57)

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Uide — 55
enGIne dIsPlACement, boRe And stRoke
you could simply check the factory specs on the Engine Dis-
placement of your vehicle, but that number is usually a rounded
up or down number. If you are building an engine to your specifi-
cation, or modifying one and want to know the effects on dis-
placement by changing Bore and/or Stroke, the Hot Rod Calc
can do it.
engine displacement — Based on Bore and Stroke
In this example, your 1968 Pontiac GTo’s Ram Air II engine has
a published Engine Displacement of 400 CID. The spec Bore
and Stroke are 4.12 inches and 3.75 inches, respectively. Calcu-
late the exact cubic-inch displacement. your calculator defaults
to 8 cylinders.
KeysTroKe disPlay

0.
1. Enter your Bore and Stroke:

bore 4.12
in

sTroK 3.75
in
2. Calculate the actual Engine Displacement:

enG
siZe
399.95
CU in
**

enG
siZe
6554.004
CC

enG
siZe
6.554
l
 *
Cyl
Vol
49.994
CU in
* Repeated presses of  will toggle through the inputs and outputs,
starting with the entered Bore.
** While the exact displacement of the 1968 Ram Air II engine is about
399.95 CID, it’s a tough number to market by the factory. To make it
simple on the guys in the suits, the displacement was rounded up to a
nice even 400 CID. Notice the Engine Displacement is also displayed
in cubic centimeters and liters, and lastly, the cylinder volume is calcu-
lated and displayed in cubic inches.
(cont'd)
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