A '91 GT 5.0/302 Block bored 0.030" over equals: ? - MustangForums.com


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Old 03-02-2005, 02:29 PM   #1
Justin_Bradley
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Default A '91 GT 5.0/302 Block bored 0.030" over equals: ?

Is that a 347? or 331?
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Old 03-02-2005, 02:41 PM   #2
bmorrisj
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Default RE: A '91 GT 5.0/302 Block bored 0.030" over equals: ?

with stock rod and crank its a 306, with 3.25 stroke and 5.4 rods its a 331, and with a 3.4 stroke and 5.4 rods its a 347...
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Old 03-02-2005, 03:15 PM   #3
Justin_Bradley
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Default RE: A '91 GT 5.0/302 Block bored 0.030" over equals: ?

Oh so stroke is the main factor in upping displacement? Gotcha...

LOL see I used to see 306 in adds for internals kits from like Coast High Performance and **** and wouldn't know where that came from.
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Old 03-02-2005, 03:16 PM   #4
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Default RE: A '91 GT 5.0/302 Block bored 0.030" over equals: ?

What is a stock rod length?
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Old 03-02-2005, 03:40 PM   #5
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Default RE: A '91 GT 5.0/302 Block bored 0.030" over equals: ?

You'll get a 306.
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Old 03-02-2005, 06:45 PM   #6
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Default RE: A '91 GT 5.0/302 Block bored 0.030" over equals: ?


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ORIGINAL: Justin_Bradley

What is a stock rod length?
5.090"
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Old 03-02-2005, 06:57 PM   #7
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Default RE: A '91 GT 5.0/302 Block bored 0.030" over equals: ?


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ORIGINAL: bmorrisj

with stock rod and crank its a 306, with 3.25 stroke and 5.4 rods its a 331, and with a 3.4 stroke and 5.4 rods its a 347...
So you use the same length rods for both a 331 and 347? How does the piston not hit the top of the combustion chamber with the longer stroke crank. Or does the piston not come flush with the deck with a 3.25" stroke and 5.4" rods?
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