Maximum bore BBchevy

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Old 01-04-2012, 05:40 PM
  #11  
cncmotorsports
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Dart or world block only for the 4.500 bore
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Old 01-04-2012, 06:28 PM
  #12  
TheRabbit
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I agree that a dart block is the way to go. I used a 502 gm block with a 4.25 stroke and 4.530 bore to make a 548. It was 868hp and the block help up fine.
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Old 01-05-2012, 07:13 AM
  #13  
TS1955
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Originally Posted by hink
Originally Posted by ewing
For a 4.500" bore, it's time for a Dart or World block.

Dart only !!!!
I'm working on a Dart Big M now with a cracked oil galley. It's leaking oil into the coolant passage.

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Old 01-09-2012, 09:58 AM
  #14  
oldandtired
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Originally Posted by coloradoracerguy
I wouldn't try the 4.5 stroke either, as you'll likely hit the oil gallery in the oil pan rail while trying to clearance it..........
x 2
JMO - Max reccomended on truck block is 4.25 with steel rods at 2.10 journal (SBC size).
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