Low compression 340 VS high compression...

Kern Dog said

Care to elaborate?



I always use the compression ratio calculator posted on the Summit Racing site.

View attachment 1716480422

I have two sets of head gaskets, both are .051 from the box. The 23 ccs that I measured could be off a cc either side of 23 but that makes so little difference here from what I can tell.

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I'm running Silvolite 1267 pistons which look similar, and they are approximately .014 above deck. Possibly 9.6:1 with the heads being decked considerably.

You must have a considerable dished piston to be that low...

UEM Silvolite 1267.030 MOPAR 340 LA Engines Flat Top Cast Pistons Set Of 8