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-   Engine Tech (https://www.racingjunk.com/forums/forumdisplay.php?f=9)
-   -   Maximum bore BBchevy (https://www.racingjunk.com/forums/showthread.php?t=31372)

cncmotorsports 01-04-2012 05:40 PM
Dart or world block only for the 4.500 bore

TheRabbit 01-04-2012 06:28 PM
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.

TS1955 01-05-2012 07:13 AM
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.

TS1955

oldandtired 01-09-2012 09:58 AM
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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