Technical > Matt Shaff's Engine Shop

how much power is extra compression worth

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wideopen231:
Building 526 Hemi for fed. Lots of used top alcohol parts. Pistons are good for 12.5 to maybe 13.25 depending on gaskets and rods used. Would like 14 to one and wondering waht say the 1.5 to one would be worth in power.
 4.31 bore
 4.5 stroke
 +220,.280 or .340 rods
   278/282  .750 cam 114 cl
  BAE fuel style heads
 sheetmetal intake
 Injection
 80a pump
 msd mag 12

  My thoughts are it might pick me up 25 hp to 30 and that not a lot for cost  especailly in bracket race engine.

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