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Generation III Internal Engine
1997-2006 LS1 | LS6
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Old 04-15-2003, 07:06 PM   #1
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Default Bore and Stroke of LS1

what is the bore and stroke of the LS1 and how do u get it to equal to 346ci?
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Old 04-15-2003, 07:17 PM   #2
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Default Re: Bore and Stroke of LS1

bore 3.898 (rounded to 3.9)
stroke 3.622
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Old 04-15-2003, 07:18 PM   #3
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Default Re: Bore and Stroke of LS1

Stroke=3.622
Bore=3.900
Bore*Bore*Stroke*.7854*8
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First thing I'll do is call Comp and tell them to grind me a CC306 for the LS2
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Old 10-25-2008, 12:57 AM   #4
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Stroke=3.622
Bore=3.900
Bore*Bore*Stroke*.7854*8
<img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
and is there any difference between the stoke thats 3.900 instead of 3.622.
The reason why i searched and asked is because on jegs they have 347 kits and there is 2 kits everything identical, except the different stroke.. is there a reason why there different and which one is better and why? thanks
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Old 10-25-2008, 04:31 AM   #5
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Yes. the difference is 0.278 inches lol. If you put a longer stroke into the engine, you increase displacement and it's not a 347 anymore. With everything else the same, a longer stroke makes more torque, and brings the power peak in lower in the rpm band. Neither is better, it just depends on what you want from the car.

If you want any more LS1 measurements:

http://www.smokemup.com/tech/ls1.php
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Old 10-25-2008, 04:32 AM   #6
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Torque = Fun
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Old 10-25-2008, 12:49 PM   #7
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Look out for the post police. They won't tell you why, just refute anything theoretical that you state. And call you and idiot. The unfortunate side of LS1tech.

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Originally Posted by KMS.1320 View Post
Yes. the difference is 0.278 inches lol. If you put a longer stroke into the engine, you increase displacement and it's not a 347 anymore. With everything else the same, a longer stroke makes more torque, and brings the power peak in lower in the rpm band. Neither is better, it just depends on what you want from the car.

If you want any more LS1 measurements:

http://www.smokemup.com/tech/ls1.php
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