Thread: My turbo 1974 Ventura
View Single Post
  #3  
Old 07-20-2015, 04:54 PM
conceptfab conceptfab is offline
Member
  
Join Date: Mar 2012
Posts: 37
Default
the compression calculator with a factory 389 bottom end and the 6X heads puts it at 7.6:1 compression and I run 91 and 100 octane mix till I sort out the timing and general tune

Reply With QuoteReply With Quote