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427 summer build?

Generation III Internal Engine 1997-2006 LS1 | LS6

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427 summer build?

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Dec 14, 2005 | 09:32 AM

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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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Dec 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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Dec 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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Dec 14, 2005 | 03:35 PM

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Quote:

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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Dec 14, 2005 | 03:39 PM

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Quote:

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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Dec 14, 2005 | 06:03 PM

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Quote:

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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Dec 14, 2005 | 09:06 PM

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Thanks for the input

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