Thread: rpm not changing
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Old 01-20-2011, 04:12 AM
  #8  
smokinsmallblock
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Join Date: Oct 2007
Location: va
Posts: 19
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i sent my heads to steve schmitz. got the open up. i went from 6.20's to 5.90's. yes the mph did change wit the 5.43 only went 6.00's wit them but the same rpm. only 109mph. avg. mhp is 113
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