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LS9 Piston / rods in LS3

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Old Apr 27, 2017 | 08:05 PM
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Default LS9 Piston / rods in LS3

Is it possible to fit the LS9 piston & rods in a LS3 short block?

If yes, is it bolt-on?!

thanks

Last edited by Al3x_666; Apr 28, 2017 at 12:10 AM.
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Old Apr 27, 2017 | 09:09 PM
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Yes you will have lower compression not a problem if for boost however.
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Old Apr 27, 2017 | 10:11 PM
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Yes the car have ECS S/C & methanol.

Thanks
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Old Apr 27, 2017 | 10:13 PM
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We broke a piston on the dyno run...



We want to put the LS9 forged stuff.
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Old Apr 28, 2017 | 07:43 AM
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Originally Posted by Al3x_666
Is it possible to fit the LS9 piston & rods in a LS3 short block?

If yes, is it bolt-on?!

thanks
You may need to have the assembly re-balanced, as I would think that the Ti rods would be lighter than the stock LS3's, something you should investigate to confirm.
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Old Apr 28, 2017 | 10:35 PM
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Should be able to find some afternarket pistons that are very close weight wise if that's what you want to do.

How much boost were you running? Need to make sure it wasn't a tune issue. A bit of stupid on timing and or knock sensor settings and you'll get this again
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