Milling Heads to a desired Compression Ratio

Enter the required information into the black boxes and click results!

Tip!

This Calculator is designed to tell you how much you need to mill your heads to achieve the 

specific Compression Ratio you are looking for.  If you Do not know your current 

Compression Ratio, go to the CID/Compression Calculator to figure it.  You will

need the actual compression of your setup now to complete this calculation.

 

Common Chevy Numbers
Stroke CID

3.10 3.00 3.48 3.00 3.27 3.00 3.48 3.25 3.62 3.25 3.48 3.48 3.66 3.62 3.48 3.75 3.75

262 265 267 283 293 302 305 307 325 327 332 350 350 364 377 383

400 

Current Compression Ratio:  

Desired Compression Ratio:

Stroke of Crankshaft:

Amount to Mill the Heads for this CR:         

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Calculators compliments of HRS Applications for use for The Dirt Forum "Users"!


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