L83 rocker arm ratio? - LS1TECH - Camaro and Firebird Forum Discussion

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L83 rocker arm ratio?

 
Old 02-03-2019, 12:38 PM
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Default L83 rocker arm ratio?

first I'm wondering what the stock rocker ratio is on the L83?

second, what can I safely increase the ratio too, before causing damage to valve tip, or valve guide?

Thanks for any info you can share!!!
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Old 02-03-2019, 12:44 PM
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If the LT engines are the same as LS engines, the ratio is 1.7:1. I have not heard that has changed.
Not sure if anyone makes different ratio rockers for those engines yet. Might be better off changing the cam.
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Old 02-04-2019, 11:11 AM
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Gen V LT1 has "Rocker Arms: Cast Roller Trunnion, 1.81:1 Ratio" from all the info I've read. The was taken from PACE Performance.com Who knows if a 5.3L is the same ratio or not.
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Old 02-04-2019, 11:41 AM
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Whoa! So they DID change the ratio. Good to know!
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Old 02-06-2019, 06:38 PM
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I just found some tech data saying the DI L83 is 1.8:1
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