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107 AND COMP & TIMING

Started by tmwmoose, August 30, 2010, 08:30:09 AM

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tmwmoose

I reassembled my 02 107"  earlier this year with a compression drop and noticed something maybe odd at least to me what do you think?
  OK here's the numbers, chamber + Hg+deck= 94.9cc  bore 4.145 by 4.00 strk and piston dome @ 3cc I come up with 10.6-1  I have a crane 296-2  which puts ccp around 198 cor comp 9.48-1
  This past week I started messing with the timing on the dtt I started out low and have increased the two timing events till I have reached setting nine here's whats weird no spark knock so I wonder if somethings wrong with the dtt so on goes the dyna set at 34a still no knock, not that I want it, is the build that mild? I even started leaving the comp releases off and it cranks fine . A compression test only nets 190psi before the starter clutch gives up.
Previously this was a 11.2-1 motor  so unless I have calculated wrong would a half point drop in comp produce what I'm experiencing here? Not complaining motor runs great!