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05-11-2004, 08:01 PM | #1 |
Registered Member
Join Date: May 2004
Posts: 1
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machine work
what is the largest dispalcment achievable with a 302, (without changing out the crank).
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05-12-2004, 07:21 AM | #2 |
or '331 LX Eric'
Join Date: Jan 1999
Location: Columbus, Ohio
Posts: 2,142
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Keeping the stock stroke of 3.00" you can bore the cylinders to:
.030" over to make a 306 cu in or .040" over to make a 308 cu in. I personnally haven't seen anything greater than a .040" over bore on a stock block. It may be possible, but I'm not sure who would make a piston for anything greater than 4.040". Plus, the more you bore the less material between the cylinders which means a weaker block. E
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1991 5.0 LX Coupe - 40,750 miles 331 cu. in. / Tremec 3550 / BFG Drag Radials 12.22 @ 114.31 mph - w/1.89 60' |
05-12-2004, 10:02 PM | #3 |
Registered Member
Join Date: Nov 1998
Location: Houston, Tx.
Posts: 3,887
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Thin wall castings
Thne 289/302/5.0 blocks are "thin wall castings". That's great for light weight, but is not good for more than .030 or .040" at he most over bore.
Rev
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'66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi. O.B.C. #2 '66 coupe |
05-13-2004, 10:01 AM | #4 |
It's a lot like a race car
Join Date: Aug 2000
Location: Meridian, MS
Posts: 4,130
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You can bore a 302 out to a .040 have have a 308.
I've seen a early model block taken to .060, which is 310 cubic inches. That way you can have that ultra cool 4 extra hp, it's just not worth it to even worry about it. -Josh, aka the tireburner
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1987 Buick T-type 1998 HD Electra Elide |
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