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Old 10-16-2019, 08:28 AM   #1
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Default What bearing for stock crank LS 1000hp

What is your go to bearing for LS stock crank build in the 1000-1100hp range?
Using the Molnar power adder rods.
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Old 10-16-2019, 10:36 AM   #2
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Default Re: What bearing for stock crank LS 1000hp

I use Calico coated ACL H-series on pretty much everything.
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Old 10-17-2019, 02:40 PM   #3
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Default Re: What bearing for stock crank LS 1000hp

You like using them even on the aftermarket crank and block combinations?
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Old 10-17-2019, 06:56 PM   #4
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Default Re: What bearing for stock crank LS 1000hp

I'd be using the bi metal king HP

Stuff that is moving around and scrubbing..... By far better
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Old 10-17-2019, 11:28 PM   #5
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Default Re: What bearing for stock crank LS 1000hp

King HP. Bi metal bearing
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Old 10-17-2019, 11:56 PM   #6
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Default Re: What bearing for stock crank LS 1000hp

Mike Lough has me using the basic stock replacement kings for stock 6.0 crank/pro ls hbeams. its what the 5.3 had the last 2 seasons and held up fine at 26lbs. Doing a 3.898 bore iron ls1 with 6.0 crank so no mallory was needed. Std polished crank mike had and balanced for me
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Old 10-18-2019, 01:39 AM   #7
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Default Re: What bearing for stock crank LS 1000hp

They are a bi metal.

See if you can keep the crank from scrubbing. The trimetal is the ticket

There isn't a thick overlay on the trimetal, if you get into the copper it gets ugly fast

The bimetal is far thicker, you can scrub into the bearing without it wanting to bite, it will actually polish the journal
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Old 10-18-2019, 06:45 AM   #8
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Default Re: What bearing for stock crank LS 1000hp

KIng's here as well. 4 years, over 100, 20#+ hits (1000hp), and 2000 street miles on my stock crank, L33 block 5.3. No issues. I would trust Brian's opinion without hesitation as well.
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Old 10-18-2019, 11:03 AM   #9
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Default Re: What bearing for stock crank LS 1000hp

I used the Calico coated ACL H-series on a 414 sbc na combo and they are great. With my last few boosted sbe 5.3s at 900hp I've used King XP only because I had some in a package deal I bought. I had good luck with them but was a little more concerned about this 5.3 at around 1100hp and planned to use the HPs. Thanks for the confirmation.
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Old 10-18-2019, 05:38 PM   #10
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Default Re: What bearing for stock crank LS 1000hp

So, King HP for a stock crank?
And King XP for a forged crank?
I put King XP in mine, but I had switched to a Molnar forged crank.
Was looking for a bit more clearance. Zbrown suggested them for the extra clearance.

Sadly, left some shit in the oiling passages and it started making metal. Was obvious when I tore it down.
Was also obvious that even with .025-.027 on the mains things are moving around.
2 and 4 show that. As does 3.
This is an alum L33 block.

Ok so shit flexes. Forged heavier crank less than the stock cast crank? I'm thinking not. Unless it's a CCW crank.

FWIW, I bought both XP std and XP stdX but ended up with the std bearings in the engine. I can use the stdX and get more clearance.
Do the HP come in the slight oversize?

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Old 10-18-2019, 07:24 PM   #11
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Default Re: What bearing for stock crank LS 1000hp

I'm Using Kings also on a stock crank, So far so good, Im around 570hp on the motor turning 6800rpm.
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Old 10-19-2019, 12:24 PM   #12
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I’ve been using speed pro tri-Metal cs series on my 6.0l, molnar rods, and stock crank deal for about two years. 30 passes, and 2500 street miles at 1020rwhp. Tore it down a couple weeks ago. #1 rod is showing copper (probably from oil starvation at launch) and #3 main (probably from crank flex).
The King HP’s sound like they would be better.
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Old 10-19-2019, 01:05 PM   #13
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I would change bearing but I would address those issues too
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Old 10-19-2019, 01:16 PM   #14
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For sure. 4340 crank and oil pan baffle arrived this week. 👍🏻
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Old 10-19-2019, 01:55 PM   #15
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Default Re: What bearing for stock crank LS 1000hp

I've used the King HP in my SBF over the last 10 years. When rebuilding the engine during the first 6 years, I could visibly see abnormal wear on the chamfered side of the rod bearings. I didn't know until later, but the rods that really weren't strong enough for the boost levels I ended up running. Finally after 720 runs I found some of the rods themselves had some funky damage during a rebuild. At this time I replaced them with some sturdier Oliver rods.

Here's the point. I never had a King HP rod bearing actually fail even though the rods were flexing under high boost levels enough to cause abnormal wear on the bearings.



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