R Randy 25 New Member Jun 29, 2008 101 0 0 Dec 21, 2008 #1 Dec 21, 2008 #1 What is the stock compression ratio of these 4.6 engines? Any difference between 05 and 09 that anyone is aware of?
What is the stock compression ratio of these 4.6 engines? Any difference between 05 and 09 that anyone is aware of?
Five Oh Brian Member Jun 13, 2007 552 1 16 Pacific Northwest Dec 21, 2008 #2 Dec 21, 2008 #2 2009 Mustang GT's 4.6L V8 has 9.8:1 compression ratio according to the Ford SourceBook.
walter Founding Member Aug 13, 1998 1,054 0 46 Houston TX Dec 21, 2008 #3 Dec 21, 2008 #3 wasn't it something like 10.0 or 10.3:1 I thought it was pretty high and unsuitable for F/I when I first heard of it.
wasn't it something like 10.0 or 10.3:1 I thought it was pretty high and unsuitable for F/I when I first heard of it.
partsbill Member Jul 27, 2006 108 1 16 Lake Worth, FL Dec 22, 2008 #4 Dec 22, 2008 #4 2005 / 2009 = 9.8:1