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Originally Posted by Boost_lee Any pics of the block with the HR pistons installed? Do the HR pistons have a shorter piston height? (hard to tell from the pics but
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11-21-2012, 06:38 AM
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A True Z Fanatic
Join Date: Oct 2009
Location: Canada
Posts: 1,156
Drives: 370z
Rep Power: 24   |
Quote:
the top base of the piston looked to be the same height. I would say the CR should remain pretty much the same as the VHR engine... the VHR piston are more flat with 2 valve relief the HR piston have a bit of a dome with 4 valve relief my guesstimate would be 10.8:1 unless a known engine builder correct me on this !  
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