New GM LS3 block
Does not have to be clearanced for a 4" stroke to make 416 cubes. If you buy your piston with the right compression height it will not need to be decked. Bore will be finished to size for piston. 4.065", just let a shop double check it for you.
Same here with eagle hbeams.
To the shop ( that deals with ls motors) sir, do it once and do it right or you'll be paying twice. Take it from guys that have been there and done that lol.
To the shop ( that deals with ls motors) sir, do it once and do it right or you'll be paying twice. Take it from guys that have been there and done that lol.
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Launching!
Joined: Aug 2010
Posts: 242
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They come complete ready to assemble. There even pretty clean out of the box. I would clean it again anyhow. Only problem for your 416 is that they are just straight bored for the 4.065 factory piston at .00005 clearence and deck plates are not used when they are honed. No prob for the factory as they are designed to wear but with a 416 and forged pistons it should be rehoned with deck plates and get your proper clearence. They move a ton with the deck plates.
They come complete ready to assemble. There even pretty clean out of the box. I would clean it again anyhow. Only problem for your 416 is that they are just straight bored for the 4.065 factory piston at .00005 clearence and deck plates are not used when they are honed. No prob for the factory as they are designed to wear but with a 416 and forged pistons it should be rehoned with deck plates and get your proper clearence. They move a ton with the deck plates.
I would definately recommend going to 4.070 (using a deck plate). Also worth noting....check piston to deck height in cylinders (1,2,7,8)... GM didnt do a very good job at holding parallism (at least with my brand new ls3 block)... mine was .004 differance from front to rear....and .002 different from one side to the other.....
