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Discussion Starter · #1 ·
Gonna do a TW-5 build with screamin eagle performance heads that have
a 78cc combustion chamber. Tryin to decide what to do about pistons and
what compression would be safe? Would 10.0 be safe or could a guy maybe
go to 10.2? This will be in an `01 Ultra with final tuning to be done at
World Class tuning.
 
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