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Thread: Valve Springs
          
   
   

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  1. 11-22-2006 03:00 PM #1
    chevy 37's Avatar
    chevy 37
    chevy 37 is offline CHR Member
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    Valve Springs

     



    Since I don't want my stock valve springs to float at around 4,000-4,500rpm's, I have heard that stock Lincoln/Zephyr springs are good for 6,000rpm's or better. If so I can get a set and wanted to know if this is correct. I plan to run my flattie at rpm's of no higher than 6,000. Also does anyone know if ford or mercury used adjustable tappets?
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  3. 11-22-2006 03:14 PM #2
    Dave Severson
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    Quote Originally Posted by chevy 37
    Since I don't want my stock valve springs to float at around 4,000-4,500rpm's, I have heard that stock Lincoln/Zephyr springs are good for 6,000rpm's or better. If so I can get a set and wanted to know if this is correct. I plan to run my flattie at rpm's of no higher than 6,000. Also does anyone know if ford or mercury used adjustable tappets?
    Don't hold me to it, but I believe the adjustable tappets on the flatties were only an aftermarket deal. Messed with a flattie years ago and that was the first go fast parts I bought for it, though!!!
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  4. 11-22-2006 03:15 PM #3
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    pat mccarthy
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    well i am building one right now. i think i would not run one that hi with stock rods scat makes a nice mass for the flat heads. i would look at the isky springs i think i will used the kit from isky ajustable lifters from crower or isky i think jonhson lifter made them but do not think they were stock on any flat heads
    Last edited by pat mccarthy; 11-22-2006 at 04:15 PM.
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  5. 01-14-2007 05:51 AM #4
    R Pope
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    If you're serious about that kind of rpm, leave the stock lifters in there. The adjustables are great, but they're heavier and lead to earlier valve float. Save your money for some con rods.
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