Generation III Internal Engine 1997-2006 LS1 | LS6
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Old Aug 26, 2007 | 07:54 AM
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hesham's Avatar
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Default 383 stroker

if i have ls1 5.7 block and i bought 6.125 rods and 4.030 pistons and i used 6.0 4" cranck can i make 383 strocker?
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Old Aug 26, 2007 | 10:51 AM
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woah woah wait. a 4 inch crank with a 4.03 bore isnt a 383. If i remember correctly, my fathers 388 CI is a 3.75" crank and a 4.06 bore (60 over instead of your 30). He was running 355 CI with just a 30 over bore (like you wanto run 4.03) with the stock 3.48" crank. On like there are calculators that tell you what your cubic inches will be, when your suggested application or 4.03" X 4.00" you get 408 CI
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Old Aug 26, 2007 | 10:55 AM
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you cant use the 4.03 pistons in the ls1 block unless you sleeve it. For a ls1 383 you need 3.905 pistons and a 4.0 crank.
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Old Aug 26, 2007 | 11:42 AM
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Originally Posted by nobreaks254
you cant use the 4.03 pistons in the ls1 block unless you sleeve it. For a ls1 383 you need 3.905 pistons and a 4.0 crank.

ok can i use the 6.0 crank with these pistons and 6.125 rods to make it 383
my friend told my that the 6.0 cranck is 4.0"
is this correct?
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Old Aug 26, 2007 | 03:22 PM
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the 6.0 and the ls1 crank have the same stroke. The ls7 has a 4.0 stroke. You need an aftermarket crank.
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Old Aug 26, 2007 | 10:43 PM
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Yes, the LS1 an 6.0 crank share the same stroke. If you run the LS7 crank, you will also have to use the LS7 drysump.
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Old Aug 26, 2007 | 11:01 PM
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so i have to get an aftermarket 4" crank

thanks to all of you
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