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need new heads?

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Old 12-11-2006, 04:31 PM
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John_Niemi
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Default need new heads?
i want to get a blower by next season, my question is do i need to get new heads or what? the previous owner milled them .040 over, ive heard you dont want to run a high compression with a supercharger so...
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Old 12-11-2006, 04:56 PM
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5speed GT
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Default RE: need new heads?
how much boost are you trying to run?

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Old 12-11-2006, 04:59 PM
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John_Niemi
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Default RE: need new heads?
probably 8, im thinking of getting a novi 1000
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Old 12-11-2006, 05:00 PM
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w8less
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Default RE: need new heads?
probably if everything else being the same u probably have around 9.5:1CR
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Old 12-11-2006, 05:00 PM
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Default RE: need new heads?
if u wanting to run 8 i would highly recommend it
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Old 12-11-2006, 05:12 PM
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John_Niemi
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Default RE: need new heads?
what are the cons to keeping my milled heads, am i risking something breaking or losing alot of pwer
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Old 12-11-2006, 05:35 PM
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w8less
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Default RE: need new heads?
its not a boost friendly cr u need to drop to around 8-8.5. u can have detonation problems if u don't have a high enough octane
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