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Pistons for 419 stoker

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Old Dec 22, 2024 | 10:00 PM
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Default Pistons for 419 stoker

Hey guys I ended up with a 6.2 block out of a Denali truck. The block is at the machine shop waiting on pistons. I have ordered 4.085 bore -20 cc dished pistons with 4 inch stoker crank and 6.125 rods. I was recommended those pistons and now I’m second guessing them. I’m still wanting to run pump 93 and was told the 20 dished pistons were my best option. Starting to doubt that now. What does everyone else recommend. Yes I will talk to my machine shop about this as well.
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Old Dec 22, 2024 | 10:44 PM
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Your piston choice suggests that plans are to boost this engine at some point. Don't think that's a good idea with that stroke.
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Old Dec 23, 2024 | 12:27 AM
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STOP!!!! LS3 AT 4.085 IS A GRENADE. Cancel order on pistons asap. That **** will blow up as soon as you start it, at that thin of a cyl wall. If the block has to go 4.085, you are already done. LS3 blocks are .010 max and that's questionable. Add boost and forget it. Either go iron block or you need to rethink your combo.
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Old Dec 24, 2024 | 10:26 AM
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Originally Posted by DualQuadDave
STOP!!!! LS3 AT 4.085 IS A GRENADE. Cancel order on pistons asap. That **** will blow up as soon as you start it, at that thin of a cyl wall. If the block has to go 4.085, you are already done. LS3 blocks are .010 max and that's questionable. Add boost and forget it. Either go iron block or you need to rethink your combo.
I agree 100% with Dave here. DO NOT let that shop bore that block to a 4.085. If it’s a must, go 4.070 with a hone MAX. I also would not go 4’’ stroke on that block. The sleeves are too short for a reliable build using a 4” stroke.
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