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427 summer build?

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Old 12-14-2005, 09:32 AM
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Default 427 summer build?
I have LS1 block that I would like to resleeve, but I'm trying to figure out what bore, rod length & crank to use to get to 427? Any help would be appreciated, because I'm trying to round up parts for this summer.

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Old 12-14-2005, 10:34 AM
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4.125" bore, 6.125" rods, 4" crank for "normal" 427.

You can also use a 4.060 bore with a 4.125" stroke to reach 427.
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Old 12-14-2005, 02:00 PM
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Sounds like your in the same boat as me. I am going with a 4.125" stroke and a 4" bore as said. I think it is actually a 427.65, which would be a 428ci, but 427ci sounds so much cooler.
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Old 12-14-2005, 03:35 PM
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Originally Posted by ls6jimmy
I have LS1 block that I would like to resleeve, but I'm trying to figure out what bore, rod length & crank to use to get to 427? Any help would be appreciated, because I'm trying to round up parts for this summer.

Thanks
I think its cheaper to sell the LS1 block and resleeve a LS2. However from what i hear resleeved ls1's are stronger.
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Old 12-14-2005, 03:39 PM
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Originally Posted by Wet 1
4.125" bore, 6.125" rods, 4" crank for "normal" 427.

You can also use a 4.060 bore with a 4.125" stroke to reach 427.
wouldnt you get more power from using a bigger stroke and smaller bore, as apposed to the first setup?
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Old 12-14-2005, 06:03 PM
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Originally Posted by 98_Formula
wouldnt you get more power from using a bigger stroke and smaller bore, as apposed to the first setup?
A longer stroke limits high RPM reliability. I wouldn't feel comfortable spinning a 4.125" crank past 6500rpm unless the motor was 100% solid.
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Old 12-14-2005, 09:06 PM
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Thanks for the input
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