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Valve spring Question

This is a discussion on Valve spring Question within the Internal Engine forums, part of the LSx Technical Help Section category; What lift are the yellow z06 valve springs rated up too?...

  1. #1
    Impounded
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    Valve spring Question

    What lift are the yellow z06 valve springs rated up too?

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    Slow'er'Ass Mr. Luos's Avatar
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    I believe it was .550"...don't quote me though.

    I would go with Comp 918's for a mild cam or a nice dual spring with an aggressive cam.

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    Mr. Lous,

    what name brand would you suggest on the dual springs for the LS6 heads with an aggressive cam? I want to replace the lifters while the heads are off as well. I currently have the hardend push rods from comp cams to install. your thoughts suggestions?

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    Nitrous Tuner LS2Tuner's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    I believe it was .550"...don't quote me though.

    I would go with Comp 918's for a mild cam or a nice dual spring with an aggressive cam.
    I think your about right I was thinking .560 but then again there is a lot of variables. It will all depend on retainers and locks as to what the finale installed heighth is.

    I would agree with the Comps will be a much better spring and will go right in with out cutting the spring pocket.
    Don't be afraid of the bottle!!! Be afraid of your tune!!!

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    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by Brian Hoeffler View Post
    Mr. Lous,

    what name brand would you suggest on the dual springs for the LS6 heads with an aggressive cam? I want to replace the lifters while the heads are off as well. I currently have the hardend push rods from comp cams to install. your thoughts suggestions?
    Manley
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    Depending on lifters..you might need a different length pushrod. Should be able to easily sell the others though if that is the case.
    How aggressive of a cam?

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    Member jrgswhitels1's Avatar
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    Yellow units are .580 lift max zo6 springs, green springs are the .560 max lift!!

  7. #7
    Member jrgswhitels1's Avatar
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    If you dont pay attention to the colors,(they both look similar in color believe it or not!!)you could take home the wrong ones!!

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    Mr Lous,

    I got the Blue set of springs from comp, the cam specs are 228/231-571/573@112 LSA. Well under the 600 mark. I should need to upgrade the lifters with this cam should I?

  9. #9
    Member jrgswhitels1's Avatar
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    I would if you have over 100,000 miles on the motor! Obviously for safety! Worn down/tired plungers will snap retainer and explode at high RPM. However, I have seen 4th. gens. run fair camshafts w/heavy lifts with stock lifters with roughly 125,000 miles on the clock!! I think your safe though with the stock lifters. Just depends on condition and wear of your ls1. If its a ticker in stock form, I would change them out, if not, save yourself alot of time and effort and just stab that new cam in there!!

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