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Old 01-03-2007, 02:50 PM
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512 bbc?

I'm looking at a bbc short block that the owner claims is 512 ci. It is supposedly a 1969 mk IV block with stock components (427 crank). Excuse my dumb question, again, but how can he come out with this measurement? In other words how far out is it bored to get this displacement?

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Old 01-03-2007, 03:36 PM
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Here's what I come up with-

454 Engines 3.760" 4.000" 4.250" 4.500" 4.750" 4.875"
Stock bore = 4.250" 427" 454" 482" 511" 539" 553"
Bored .030" = 4.280" 433" 460" 489" 518" 547" 561"
Bored .060" = 4.310" 439" 467" 496" 525" 554" 569"
Bored .090" = 4.340" 445" 473" 503" 533" 562" 577"
Bored .100" = 4.350" 447" 476" 505" 535" 565" 580"
Bored .125" = 4.375" 452" 481" 511" 541" 571" 586"



502 Engines 3.760" 4.000" 4.250" 4.500" 4.750" 4.875"
Stock bore = 4.468" 472" 502" 533" 564" 596" 611"
Bored .032" = 4.500" 478" 509" 541" 573" 604" 620"
Bored .062" = 4.530" 485" 516" 548" 580" 612" 629"
Bored .092" = 4.560" 491" 523" 555" 588" 621" 637"
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Old 01-03-2007, 05:00 PM
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tyvm

thank you-I guess the guy has his #s mixed up thanks again
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Old 01-03-2007, 05:17 PM
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Quote:
Originally Posted by 69er
512 ci. It is supposedly a 1969 mk IV block with stock components (427 crank).
Its obvious that he is not using a stock 427 crank
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