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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. |
Expensive, Yes! I believe they use a 1.8 honda journal. |
would most of the hp gains be in better crank harmonics ,or higher rpms hp ? |
Through lower friction, so I would say increased power throughout the range, though the increase would be minimal. |
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. |
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. |
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. |
Originally Posted by KCS
(Post 19902209)
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. |
Here you go.. one with honda journals in the classified section... https://ls1tech.com/forums/parts-cla...rankshaft.html |
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 Crankshaft@6K, the Billet Rods@3K, the .750" M-350 DLC pins@1K. 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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