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Smaller rod journals in LS?

Old 05-18-2018, 08:25 PM
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Default Smaller rod journals in LS?

Has anyone used smaller rod journals in any LS build? I know this can get expensive, and probably not much return for the money, but it has to help in quick reving, high rpm, N/A applications.
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Old 05-20-2018, 11:28 PM
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Expensive, Yes! I believe they use a 1.8 honda journal.
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Old 05-21-2018, 12:05 AM
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would most of the hp gains be in better crank harmonics ,or higher rpms hp ?
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Old 05-21-2018, 01:04 AM
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Through lower friction, so I would say increased power throughout the range, though the increase would be minimal.
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Old 05-21-2018, 04:38 AM
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I wouldnt know for sure on the crank harmonics, but as mentioned reduces friction and lowers reciprocating weight. Every little bit helps for turning high RPM.
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Old 05-21-2018, 09:53 PM
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It's one of those things where you're leaving no stone unturned in your build. I would say if you're porting stock heads and using a hyd roller then you can't justify the expense of smaller journals.

But if you're using state of the art heads and intake along with a llsr, vacuum pump, lightweight drivetrain etc. then I would think this would go on the list to look at.
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Old 05-23-2018, 10:34 PM
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Callies will usually offer a 2” journal as an option for their cranks and rods. I’ve put togeter a bunch of engines with them.
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Old 06-01-2018, 10:04 PM
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Originally Posted by KCS View Post
Callies will usually offer a 2 journal as an option for their cranks and rods. Ive put togeter a bunch of engines with them.
What's your impression of smaller journals? Do you feel it helps rev quicker?
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Old 06-04-2018, 12:47 AM
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Here you go.. one with honda journals in the classified section...

https://ls1tech.com/forums/parts-cla...rankshaft.html
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Old 06-04-2018, 10:21 AM
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Default AL Main Caps = .001" MB

Hi All, the "Honda" LS crankshaft IS made for "class racing", one similar application is a "cup" engine specification.

The engine requirements ARE high RPM (9000+) AND LOW BMEP, thus no Turbos/SC/NOS.

The costs do do so is OVER 10,000 USD, the Billet [email protected], the Billet [email protected], the .750" M-350 DLC [email protected]

AL Main CAPS with "spacers" ???

I would STATE WHEN an AL billet main cap is fitted, the bearing Clearance MUST BE less than .001".

THEN there is the cost of the heads/valve train, I would fit the Mercury Racing FOUR Valve head conversion.

Lance
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