Thread: OK to use 87 octane if there is no ping?
View Single Post
  #1 (permalink)  
Old 06-29-2013, 11:54 AM
Young1 Young1 is offline
CC Member
Visit my Photo Gallery

 
Join Date: Mar 2012
Location: Ocala, FL
Cobra Make, Engine: Unique 427 S/C, FE 440, top-loader, 3.31
Posts: 130
Not Ranked     
Default OK to use 87 octane if there is no ping?
I am weaning my iron head 9.8 compression FE off 91 octane. Ran over a thousand miles with 89 and no ping. 38 degrees advance all in at 2800 rpm. Right now I am using a mix of 87 and 89 for 88. As long as it does not ping am I ok to burn 87? Any other side effects to watch for?
Reply With Quote