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Generation III Internal Engine 1997-2006 LS1 | LS6
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Swapping to Gen 4 rods worth it?

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Old 02-21-2019, 10:41 PM
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Default Swapping to Gen 4 rods worth it?
Hi all. For my estimated 400- 450 rwhp estimate, is it worth going with gen 4 rods?

The engine I'm rebuilding is gen 3 and plan to reuse/recondition block,crankshaft and connecting rods
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Old 02-21-2019, 11:39 PM
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There are Gen III's all over putting out the power you want without issues. Unless you can get a real killer deal on a Gen IV set of rods I would not loose any sleep over it.
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Old 02-22-2019, 08:27 AM
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At that power level you'll be fine. Keep on rolling with what you have.
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Old 02-22-2019, 11:27 AM
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i'll play devil's advocate. if you're gonna be doing pistons might as well throw another $100 into the fire in case you get the turbo bug.
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Old 02-22-2019, 01:41 PM
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400 500hp the gen3 can take easyyy no worries. now i think 700 750 you are on borrowed time.

im going to be doing 600 650 turbo e85
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Old 02-22-2019, 03:06 PM
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Besides size and thickness, what is the difference between gen 3 and 4 rods. I see something about floating rods for gen 4.
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Old 02-22-2019, 03:07 PM
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...size and thickness = strength....isnt that enough?
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Old 02-22-2019, 03:32 PM
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Originally Posted by panda240ss
...size and thickness = strength....isnt that enough?

I think gen 3 is press fit and gen 4 is floating? If I go with Gen 4 rods, would I need any additional supporting parts that the gen 3 doesnt have?
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Old 02-22-2019, 04:46 PM
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for your power goal you dont really need gen4 rods.....TBH

unless you just dont trust gen3 rods or your bearings or something are foooked!
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Old 02-22-2019, 05:25 PM
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No , I was just asking. I will stick with gen 3. Thanks everyone
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Old 02-22-2019, 07:38 PM
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The bushed rods are about 30 grams heavier. I wonder if you would need to rebalance the entire assy ?
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