LS Block Bore Size

Chipper Chapman · 02-20-2022, 12:12 PM

Do any of you have experience in boring the 6.0/6.2 GM blocks? What is the maximum bore size for an NA application? Can a 4.065” LS3 block go .060” to 4.125”, or the iron block out .125” to 4.125”? The only info I can find online is from the boost group that seems to rarely go more than .005-.010 over. Anyone have any first hand experience with doing this?

SSDiv6 · 02-20-2022, 01:42 PM

Quote:

Originally Posted by Chipper Chapman

Do any of you have experience in boring the 6.0/6.2 GM blocks? What is the maximum bore size for an NA application? Can a 4.065” LS3 block go .060” to 4.125”, or the iron block out .125” to 4.125”? The only info I can find online is from the boost group that seems to rarely go more than .005-.010 over. Anyone have any first hand experience with doing this?

https://www.lsenginediy.com/ls-cylin...h-performance/

02-20-2022, 12:12 PM	#1
Chipper Chapman Member Join Date: Jan 2004 Location: Belmont N.S. Canada Posts: 473 Likes: 246 Liked 166 Times in 71 Posts	LS Block Bore Size Do any of you have experience in boring the 6.0/6.2 GM blocks? What is the maximum bore size for an NA application? Can a 4.065” LS3 block go .060” to 4.125”, or the iron block out .125” to 4.125”? The only info I can find online is from the boost group that seems to rarely go more than .005-.010 over. Anyone have any first hand experience with doing this? __________________ Chris Chapman 1969 Chevelle NHRA F-G/SA 1090