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Max bore on an LS1?

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Old Nov 24, 2018 | 08:11 AM
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Question Max bore on an LS1?

I'm just curious about the stroker kits I came across. Can the LS1 be bored out to 4.005"? With a 4" stroke, the CID would be about 403 / 6.6L. That would be awesome, but I'm thinking the walls would get too thin. Has anyone tried this before?
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Old Nov 24, 2018 | 09:17 AM
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https://www.google.com/search?q=max+...obile&ie=UTF-8
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Old Nov 24, 2018 | 09:52 AM
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3.905 is MAX .
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Old Nov 24, 2018 | 11:48 AM
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Easiest way to remember is to just think you bore an iron block but you resleave aluminum.
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Old Nov 24, 2018 | 12:14 PM
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I was trying to figure out if it was cheaper to bore/stroke an LS1 up to 6.2L, or swap in an LS3. Those junkyard 6.2s are expensive.

Based on a calculator I found online, the 383 stroker kits for the LS1 will take it up to about 6.3L. It probably wouldn't be as efficient as the actual LS3/L99/etc. though.

I was just thinking that building an engine with my dad would be more fun than cutting up my car to install a turbo or supercharger kit. The turbo/supercharger would make more power, no doubt. It's just very expensive, and invasive.
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Old Nov 24, 2018 | 03:12 PM
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Originally Posted by Utinator
I was trying to figure out if it was cheaper to bore/stroke an LS1 up to 6.2L, or swap in an LS3. Those junkyard 6.2s are expensive.

Based on a calculator I found online, the 383 stroker kits for the LS1 will take it up to about 6.3L. It probably wouldn't be as efficient as the actual LS3/L99/etc. though.

I was just thinking that building an engine with my dad would be more fun than cutting up my car to install a turbo or supercharger kit. The turbo/supercharger would make more power, no doubt. It's just very expensive, and invasive.
I am a Big Fan of Father-Son Build Projects especially if you are both Car Guys.
That being said I would suggest a quality 383" rotating assembly from
WS6 Store. A well built 383" can make anywhere from 500-600+ HP @ the FW
depending on the HCI and corresponding $$$ you have to spend.
From Ported 243s W/ a hi lift hot cam & Fast 92, to the as cast LS3 240 cc
small-Bore Heads with a Mid-Length Runner Fast and a LLSR (LOL for the haters).
All depends on the goals & usage.

Father-Son Build Projects can provide Peak Experiences &
Life long memories.
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Old Nov 24, 2018 | 03:47 PM
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Originally Posted by Utinator
I was trying to figure out if it was cheaper to bore/stroke an LS1 up to 6.2L, or swap in an LS3. Those junkyard 6.2s are expensive.

Based on a calculator I found online, the 383 stroker kits for the LS1 will take it up to about 6.3L. It probably wouldn't be as efficient as the actual LS3/L99/etc. though.

I was just thinking that building an engine with my dad would be more fun than cutting up my car to install a turbo or supercharger kit. The turbo/supercharger would make more power, no doubt. It's just very expensive, and invasive.
383 ls1 with small bore ls3 heads vroom vroom
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Old Nov 24, 2018 | 08:31 PM
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I was, indeed, looking at the kits from the WS6 Store. I was wanting to re-use my current heads/cam/intake. With that kind of CID, I would probably need more air, though.

My dad grew up working on Small Block Chevy engines. I'm still kinda new to LS engines. It sounds like a fun project. Maybe one of these days when I have a few more bills paid off....
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