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Old 11-20-2012, 08:24 AM   #1
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Default Freshen up

I,m gonna freshen up my 143000 mile LT1 this winter and was wondering which valve springs to use with the stock cam?
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Old 11-20-2012, 08:59 AM   #2
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If you're staying with a stock camshaft, there are hundreds of options! I often use (and really like) a set of factory Z06 valve springs (PN 12249224) and Comp 787 retainers and 7 degree locks. I use these in a lot of the Vortec truck engines that I build where you're not running a ton of camshaft. They're certainly not a racing spring, but you don't need one and with a stock cam, they're a great setup for the $$$.
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Old 11-20-2012, 01:17 PM   #3
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Thanks for the info.I am gonna replace the timing chain,and install a set of 1.6 comp magnum rockers while i am in there.
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Old 11-20-2012, 03:27 PM   #4
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really, whatever you do, there's only two things to be concerned with

first is binding, and you should go for some kind of beehive style spring if you're putting 1.6 ratio rockers in there, to avoid the (slight) risk of binding.. lots of guys run stock springs with roller rockers, but my god are they ever close to the limit..

try and find a comp cams or whatever set that's close to stock spring pressure, but will handle the increased valve lift.. even lt4 springs wouldnt be too bad i guess..

the other thing is spring pressure, you want to be fairly close to stock, unless you rev the piss out of your motor and want to decrease valve float.

if you do go heavier on the springs, you should get hardened pushrods just to be safe too..
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Old 11-20-2012, 06:27 PM   #5
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I could always run the 1.52 ratio rockers with stock springs.
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