My question is when calculating the intake closing point why add 15 degree's never ran this program and curious why this happens or number comes from?? thanks and its snowing now.

United Engine & Machine Co. Incorporated

http://www.kb-silvolite.com/calc.php?action=compWhen I try it using my data it appears to show almost a full point

**higher dynamic compression** than other calcs I've tried using the same data. Can you confirm all the numbers I used in Bold text?

COMPRESSION RATIO CALCULATOR

Static and Dynamic Compression Ratio

(Considers Cam Timing and Rod Ratio)

ENTER YOUR DATA CALCULATED DATA

Cylinder Head Volume (cc)

** 73** Cylinder Head Vol (cubic in.) 4.453

Piston Head Volume (cc)

**3** Piston Head Vol (cubic in.) 0.183

Gasket Thickness (in.) .

**051** Swept Volume (cubic in.) 51.022

Gasket Bore (in.)

**4.10** T.D.C. Volume (cubic in.) 5.564

Cylinder Bore Diameter (in.)

**4.030** Gasket Volume (cubic in.) 0.673

Deck Clearance (in.)

**.020** Note: Neg. nubmer above deck, Pos. number below deck Deck Volume (cubic in.) 0.255

Stroke (in.)

**4.0** STATIC COMPRESSION RATIO

**10.170** Static Compression

OPTIONAL DATA

Rod Length (in.)

**6.58** Adjusted Stroke (in.) 3.508

Intake Closing Point

**33** (degrees)ABDC @ 0.050 lift plus 15 degrees

DYNAMIC EFFECTIVE COMPRESSION RATIO

**9.042**