Anyone built 482 LSX GM?
We're using a tall deck LSX block to build a 461ci LSX, thats a nitrous build with aluminum rods.
To make a 482ci, you would hypothetically need 4.250 bore x 4.250 stroke. It would be a trainwreck of a build, that would have poor gasket seal, loud pistons, and most likely use oil. Sleeve length has alot to do with it.
Hence we're using a 1.270" compression height piston vs. .990" piston you would need for 482ci build
To make a 482ci, you would hypothetically need 4.250 bore x 4.250 stroke. It would be a trainwreck of a build, that would have poor gasket seal, loud pistons, and most likely use oil. Sleeve length has alot to do with it.
Hence we're using a 1.270" compression height piston vs. .990" piston you would need for 482ci build
Last edited by AES Racing; Mar 31, 2010 at 09:20 PM.
most ideal setup I like with std. deck LSX, 440ci
4.185 x 4.000" ; 4.155" will have better gasket seal
You look at the bores, 4.185 or 4.200, its thin between the bores.
When you run a 4.185" bore you can use a 4.200" MLS gasket, all shelf parts, rings sizes are common etc. If I recall cometic goes up to 4.210" for gasket bore size. 4.250" you would need, copper gasket.
I'd say the topic has been beaten to death more then once on here.
4.185 x 4.000" ; 4.155" will have better gasket seal
You look at the bores, 4.185 or 4.200, its thin between the bores.
When you run a 4.185" bore you can use a 4.200" MLS gasket, all shelf parts, rings sizes are common etc. If I recall cometic goes up to 4.210" for gasket bore size. 4.250" you would need, copper gasket.
I'd say the topic has been beaten to death more then once on here.
Or sleeve a block and go up to 4.200 although I would go 4.185 for reliability reasons. On a short deck I would stay at 4.125 .. although 4.250 would work on something like an RHS race block.
Remember that more isn't always better..
Remember that more isn't always better..
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You could go 4.185 and be alright if you stay NA. I was wanting to do a dry sleeve 4.185" bore motor and hit it with a 150 shot or so, but i was told if I wanted to do that then I would need to step up to the superdeck 1 which is capable of 4.200 bore. I still dont know what I wanna do
You could go 4.185 and be alright if you stay NA. I was wanting to do a dry sleeve 4.185" bore motor and hit it with a 150 shot or so, but i was told if I wanted to do that then I would need to step up to the superdeck 1 which is capable of 4.200 bore. I still dont know what I wanna do
No matter which block you go with all LS blocks are 4.4" BS. They will
all have same gasket dimensions.
People use 4.250" bore size with a 4.5" bore space SBC
Heres other issue, you go for the 4.200" bore size later on after its been run and needs freshen up. No room to bore the cylinder. If you start at 4.155/4.185 you leave some options later on.
With the RHS block, they have difficulty keeping the bores round over 4.175" bore size.
We're using a tall deck LSX block to build a 461ci LSX, thats a nitrous build with aluminum rods.
Hence we're using a 1.270" compression height piston vs. .990" piston you would need for 482ci build
With the RHS block, they have difficulty keeping the bores round over 4.175" bore size.
Hence we're using a 1.270" compression height piston vs. .990" piston you would need for 482ci build
With the RHS block, they have difficulty keeping the bores round over 4.175" bore size.
Good info about the RHS block.
We are using 4.165 bore for our build.
RHS block? Pistons out of the hole? 
Do the ultimate.
Sleeve an iron LSX tall deck block, 4.250 stroke x 4.155 bore...461ci.
Plenty of gasket, plenty of piston support...tons of cylinder strength.
.
Sleeve an iron LSX tall deck block, 4.250 stroke x 4.155 bore...461ci.
Plenty of gasket, plenty of piston support...tons of cylinder strength.
.
Last edited by LS6427; Apr 1, 2010 at 08:18 PM.
FormerVendor
Joined: Nov 2001
Posts: 3,065
Likes: 6
From: Houston, Tx.
4.250 bore is not a great idea in an LSX and neither is 4.250 stroke unless you measure your particular block. Seen two different ones super nova and not much left. Both shops didn't know what they were doing though but still not a good combo for that block.
.