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  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech

01-04 mustang gt compression ratio

  • Thread starter Thread starter Emiliopac123
  • Start date Start date Oct 21, 2021
E

Emiliopac123

New Member
Aug 8, 2021
4
1
1
Los Angeles
Oct 21, 2021
#1
  • Oct 21, 2021
  • #1
Hey guys just had just needed some help finding out what the stock compression ratio is for our cars im doing a forged bottom end but have had trouble find out what stock compression ratio our cars had to get a piston dish that will hopefully get me close to stock compression . So far i have seen 9.4:1 and 9:1 and even 9.7:1 but nobody has a solid answer as what it is anything would help at this point thank.
 
D

Deleted member 38176

Oct 23, 2021
#2
  • Oct 23, 2021
  • #2
9.5:1

Up the comp to at least 10
 

manicmechanic007

5 Year Member
Sep 26, 2017
2,534
714
143
Roy, Utah
Oct 24, 2021
#3
  • Oct 24, 2021
  • #3
9 to 1 - 9.3 is factory ratio
Ford has conflicting info on this as they have had for years
Goes way back 1970 4bbl 429 is listed at 10.5 to 11.0 ;1 ratio
I am with Nightfire and would not spend money building a motor that had less than 10 to ones in it
 
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