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valve size

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Old Mar 15, 2016 | 12:04 AM
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hillmstr1
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valve size

Are the valves in a 390 bigger than a 352? If so, putting 390 heads on a 352, would it allow it to breathe better?
Thanks for the help

The New Guy
 
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Old Mar 17, 2016 | 01:34 PM
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jimbbski
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A little research and you would have found that the standard valve sizes on the FE series of engines are the same. Intake is 2.02 and exhaust is 1.55. Now if the head is a "performance" head like the 390GT head, or the 428 CJ or SCJ head, or off one of the other performance versions then they will have bigger valves.
Despite the fact that the sizes were the same on the "normal" versions of that engine the combustion chamber size and port sizes will vary but you can research that out yourself.


Ford made many versions of FE series heads.
 
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