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Old 05-30-2016, 05:15 PM   #15
christianchevell
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and the answer is................
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Old 05-31-2016, 02:33 PM   #16
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Quote:
Originally Posted by JCunningham View Post
you're not breaking anything to us we know how to find proper pushrod length. all im asking for is the oem preload. no one checks this.
Every time I have checked the factory stock preload it is usually between 2 & 2 1/2 turns!
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Old 05-31-2016, 06:54 PM   #17
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http://www.autoserviceprofessional.c...roller-lifters

Good Article, but no info on preload. Read a bunch, still a range with the lessor of two evils the noiser: less preload but no worry about valve float.....

another interesting article with actually some factory specs for preload but I have read one too many article form people still using ls1 or their bolts being a different thread pitch..so its confusing and more over confusing is the past Camaro 5 posts...LOL

http://www.corvetteforum.com/forums/...reference.html
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Old 05-31-2016, 10:31 PM   #18
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Quote:
Originally Posted by trw427ss @ Futral View Post
Every time I have checked the factory stock preload it is usually between 2 & 2 1/2 turns!
thats what i thought .094-.1175 preload.
So why set it at .030 if GM uses that much on the LS7 lifters?
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Old 06-01-2016, 02:47 PM   #19
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Quote:
Originally Posted by JCunningham View Post
thats what i thought .094-.1175 preload.
So why set it at .030 if GM uses that much on the LS7 lifters?
The preload on stock lifters is not that critical anywhere from one turn to two full turns is fine.
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12.007@ 115.20 With 18" Drag Radials - 11.93 @115.19 Added a PTB 11.76 @116.59 With Yank SS3200 Converter - 11.63 @116.52 After PI and Tuning 11.44 @118.75 New Best
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Old 06-01-2016, 04:53 PM   #20
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Correct.
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