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302 bored 30 over? 60 over?

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Old 04-06-2005, 11:46 PM
F-150Guy F-150Guy is offline
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302 bored 30 over? 60 over?

i just tore down my 302..and the pistons are stamped 30....what would this make my 302 in cubic inches? how about 60 over? does this make any noticable difference in power/mpg? thanks.
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Old 04-07-2005, 09:50 AM
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just boring wont give to much in gains if any. it can cause overheating if the cylinder walls are to thin. i believe a 302 with a .30 or .40 bore is a 306 but not 100% on that. I wouldnt take a 302 over .40 personally unless it was an older 70's block
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Old 04-07-2005, 11:45 PM
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yea, didnt think so...im not sure i have to bore it out yet, i wont if i dont have too
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Old 04-08-2005, 01:49 AM
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if you have to I would try, and get a core block from the junk yard that hasn't been bored yet if it was me. 40 is the max I would consider on a 302 block without sonic testing and even then I would really look into a new block it's not like they are rare or anything like that.
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