4.6L General Discussion This section is for non-tech specific information pertaining to 4.6L (Modular) Mustangs built from 1996 to 2004.

comp ratio

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Old 01-15-2011, 08:09 AM
  #1  
Crazycarnut
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Default comp ratio

What kind of compration ratio should I look at if I'm wanting ro run 16+ PSI? I know it needs to be low but I'm not sure what I should go with since I dont want to go to low. Also I prolly wont ever run more then 23psi. What do you guys think?
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Old 01-15-2011, 11:12 AM
  #2  
Xemeth
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8:1, 8.5:1. You can go higher, but you might need 110+ octane. If you want to stick with 91/93 than stay in the 8's.
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