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5.3 carnage, time to upgrade

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Old Nov 19, 2021 | 02:41 PM
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Default 5.3 carnage, time to upgrade

Got 2 years out of my SBE LC9 being fed by a 7875 but finally cracked ringlands in a couple of pistons. I am going to upgrade to aftermarket pistons so I can turn it up some more next year. Is it worth throwing in some forged rods? These gen 4 rods seem to hold up just as well as aftermarket ones. Looking to make around 1000whp. Does anyone have recommendations on rods and pistons? Or just stay with stock rods?
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Old Nov 19, 2021 | 03:43 PM
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Just curious, were the rings gapped for boost? Trying to avoid the same type of failure.
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Old Nov 19, 2021 | 04:02 PM
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Since I lik the idea of new rods, my plan is to source rods/pistons from Summit since they use big players to manufacture for them.

Maybe Brian @Summitracing could chime in about the benefits of doing rods too.
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Old Nov 19, 2021 | 07:49 PM
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Originally Posted by Pro Stock John
Since I lik the idea of new rods, my plan is to source rods/pistons from Summit since they use big players to manufacture for them.

Maybe Brian @Summitracing could chime in about the benefits of doing rods too.
this is what I would do if you already buying pistons get a set of rods and pistons from summit and not have to worry about anything
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Old Nov 20, 2021 | 05:05 AM
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Originally Posted by ls3fox
this is what I would do if you already buying pistons get a set of rods and pistons from summit and not have to worry about anything
Back to post #2 question. If the ring gaps are too small, the best parts in the world will still end up in whatever is left of your oilpan. There is no such thing as not having to worry about anything.
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Old Nov 20, 2021 | 07:49 AM
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I gapped the rings for boost, probably even went a little overboard to be honest. I was pushing the limits of pump 91 and think I had some detonation. Will be switching to e85 this year. Summits pro ls rod and piston looks like a decent kit so that it what I'm leaning towards
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Old Nov 20, 2021 | 01:45 PM
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I been talking to Brian N @ Summit about a rod / piston combo. I too have an LC9 to build and would shoot for 1000-1200rwhp.
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Old Nov 22, 2021 | 10:58 AM
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Thanks for the nod, John.

OP,

Our Pro LS rods and pistons are up for the task. The pistons are modern 2618 forgings designed for boost and nitrous. They have thick ring lands for durability. The rods are top-notch 4340 H-beams precision-honed in the USA to +/- .0001". The rods come out of the box with ARP 2000 7/16 rod bolts with 200,000 psi tensile strength. Those are typically an upgrade option for other rod manufacturers. Our piston and rod kits come with a premium ring pack. They include steel top rings designed for boost and nitrous. They include Napier-hook second rings for maximum strength and oil control.

Being boosted, we would assume you want to go with a dished piston. For the 5.3's we have a 7cc dished piston. There's a .005" over piston in case the bores have to be cleaned up. Either of these kits would put you right around 9.3:1 with 65cc heads and .040" head gaskets.
- Stock bore dished piston and rod kit
- .005" over dished piston and rod kit

We also have a -2cc dome piston available for the 5.3. These would put you right around 10.3:1 with 65cc heads and .040" head gaskets.
- Stock bore dome piston and rod kit
- .005" over dome piston and rod kit

One thing to note is our pistons sit .005" in the hole with a standard 9.240" deck height. Compression ratios were calculated using the handy compression ratio calculator found right on our site.

As a plus, we're running our Cyber Savings Month sale. These piston and rod kits are 10% off this week through Tuesday, November 30th.
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Old Nov 22, 2021 | 01:59 PM
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I agree with doing the summit rods and pistons. Budget but nice pieces.
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Old Nov 24, 2021 | 09:55 PM
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Another vote for Summit Rods and Pistons
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