5.3 need for balancing
Thread Starter
Teching In
Joined: Jul 2021
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5.3 need for balancing Hi everyone
Im new to ls motors, Ive stripped down my 5.3 and there are water stains in some bores, I see summit sell forged pistons with plus 5 thou(3.785), will these fit on my 2003 connecting rods, will I need to have assembly re balanced?
Any advice would be great !
Im new to ls motors, Ive stripped down my 5.3 and there are water stains in some bores, I see summit sell forged pistons with plus 5 thou(3.785), will these fit on my 2003 connecting rods, will I need to have assembly re balanced?
Any advice would be great !
Last edited by dave350v8; Jul 3, 2021 at 12:43 AM.
Thread Starter
Teching In
Joined: Jul 2021
Posts: 11
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The motor is Gen III so I presume I'm gonna need press fit Pistons? because they are 5 thou over will that throw out my balance too much? Im intending to go turbo so forged would be best?
I was hoping to give it a hone which would save machining bores out to to the next piston size.
I was hoping to give it a hone which would save machining bores out to to the next piston size.
Last edited by dave350v8; Jul 3, 2021 at 11:27 PM.
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Launching!
Joined: Feb 2018
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From: Bismarck, ND
weigh them Hello,
Get a scale and weigh the pistons. Different makers end up with different weighs . If they are close you can lighten the new ones if they are heavier. It is hard to get an answer what they weigh before you buy them. OE pistons will probably be close.
Hope this helps.
Get a scale and weigh the pistons. Different makers end up with different weighs . If they are close you can lighten the new ones if they are heavier. It is hard to get an answer what they weigh before you buy them. OE pistons will probably be close.
Hope this helps.
Having said that, I would balance it if I were building it. I always do. Heres whythe out of balanced assembly will create harmonics somewhere in the rpm powerband, and that will cause it to fight against itself, costing you performance. NOW.if this is not a performance build, and just a cruiser or woods buggy, then just send it.
Need to balance? No, in this situation. Good idea to balance? Always. Most shops are around $250 if no heavy metal is needed.
Thread Starter
Teching In
Joined: Jul 2021
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Does it NEED balancing to run good? Prolly not. GM never balanced it to start with. They “weight match” sets of piston/rod assembly’s to certain bob weight cranks and throw it all together.
Having said that, I would balance it if I were building it. I always do. Here’s why…the out of balanced assembly will create harmonics somewhere in the rpm powerband, and that will cause it to fight against itself, costing you performance. NOW….if this is not a performance build, and just a cruiser or woods buggy, then just send it.
Need to balance? No, in this situation. Good idea to balance? Always. Most shops are around $250 if no heavy metal is needed.
Having said that, I would balance it if I were building it. I always do. Here’s why…the out of balanced assembly will create harmonics somewhere in the rpm powerband, and that will cause it to fight against itself, costing you performance. NOW….if this is not a performance build, and just a cruiser or woods buggy, then just send it.
Need to balance? No, in this situation. Good idea to balance? Always. Most shops are around $250 if no heavy metal is needed.