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Stock valve springs?

This is a discussion on Stock valve springs? within the Internal Engine forums, part of the LSx Technical Help Section category; I'm planning a head/cam swap. I've got the funds for the cam now but can't swing the heads until early ...

  1. #1
    Junior Member
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    red
    2002 camaro ss

    Stock valve springs?

    I'm planning a head/cam swap. I've got the funds for the cam now but can't swing the heads until early summer. I'm doing the work myself so labor is not an issue. I'd love to put the cam in now, but how much can stock springs take? I'd also hate to change springs now and heads later. I've read several threads discussing "stock" heads, does that include springs? Thanks a ton.

  2. #2
    Grand Imperial Wizard Sarge's Avatar
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    Retired Outlaw Sum Bitch

    What is the lift and duration of the new cam please?

  3. #3
    Senior Member mrr23's Avatar
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    dark bowling green
    2000 corvette

    the stock springs can't handle much more than a stock cam. plus, with the added age and mileage of the current stock springs, it's not advise able. stock springs are 85# seat pressure when new. most aftermarket cams need at least 112# seat pressure.

  4. #4
    Tech Junkie hammertime's Avatar
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    Pewter Metallic
    2001 Camaro SS

    To really take advantage of a new camshaft, the springs must be matched to the profile you've selected. As pointed out above, more radical valve movements combined with aging stock springs will not give you the best results.

    At best, you can expect the operating range to fall short of what's intended to due valve float or loss of valve control. With bigger cams, weaker springs (or both) you may damage the valvetrain or pistons. Springs and retainers are cheap insurance when swapping cams, and will be necessary for the most power out of your cam.
    Hammer - hammertime.us
    2001 Light Pewter Metallic Camaro SS, 6 speed
    K&N, SLP Lid, SLP y-pipe, GMMG cat-back, Lou's Short Stick - more to come!

  5. #5
    Junior Member
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    2002 camaro ss

    Thanks. the car has 12,000 on it so springs aren't completely clapped out, but I also don't want to tear anything up.If I have to I'll wait on the heads. Thanks Again. Also not decided on a cam, still sorting it out.
    Last edited by rnl35thss; 02-15-2006 at 07:17 PM.

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