Valve spring life?

Discussion in 'Race 400/430/455' started by Dubuick, Oct 25, 2004.

  1. Dubuick

    Dubuick CMDR Racer

    What is the life of the ta 1160 valve springs The last few times i have gone the track I can't seem to get any mph out of it I ran 10.51 at only 123 with 1.43 short over 5800 the car seems to fall flat ?also The other thing i'm gona try is that the last time i adjust the valves I tighted up the adjustment from .030 to .018 but i don't know when i lost the mph I had to many other problem this year so gona put it back to .030 to try it beore this weekend. But as for the springs there two years old and around 200 passses on them planned on getting new one over the winter anyway just wondering if that is nomal life?
     
  2. buick535

    buick535 Well-Known Member



    Hard to say here. What size cam you running? Judging by the springs, probably pretty big. A big cam can kill valve springs in very short time. I found this out the hard way many years ago. I also found that coating the springs with a moly based dry film coating greatly exended the life of the springs. Jim Burek P.A.E ENTERPRISES
     
  3. Dubuick

    Dubuick CMDR Racer

    The cam is ta 508s its .278 at .050 .620 lift with 1.65 roller rockers and heavy 3/8 push rods
     
  4. buick535

    buick535 Well-Known Member



    Yup, that's what I figured. That much cam is hard on valve springs.
    I woudl coat them if it was me. Jim Burek
     
  5. C9

    C9 Roadster Runner

    I have a set of KB's valve springs that I ran with their #118 cam (.518 lift if I remember right) and later ran with a milder cam with about .460 lift.
    Granted, not the lift figures you're dealing with.

    I set them up at the high end of the spring length specs and they've gone 41,000 miles with no problems.
     
  6. buick535

    buick535 Well-Known Member


    When you run a valve spring at very close to coil bind, it will wear out much faster. When you compress a valve spring , it gets hot, heat kills springs. With most double and triple springs sets, the springs fit somewhat tight together, they actually rub against each other, ie, inner and outer rub together slightly. This of course causes friction which cause heat which causes spring fatigue.
    This is where the coating really makes a difference. Jim Burek
     
  7. C9

    C9 Roadster Runner

    Point taken and I agree.

    I worded the comment about spring height poorly.
    They are at the outer limits so coil bind would be a lesser problem.

    What kind of preparations are required for the lube coating?
    Sounds like something that could be accomplished in the home garage.
     
  8. Dubuick

    Dubuick CMDR Racer

    Yea the coating sounds like some thing i would like to do for the next set of springs. The coated cam bearings seemed to work well. How do I go by getting a set coated?Also I need a new set of push rods is there any new hot set up for them like a stong lite weight set?
     
  9. buick535

    buick535 Well-Known Member


    There are companies that can supply you with the chemicals tocoat them your self, but it would be cheaper to let someone else who does it do them for you. It does require cleaning, an oven and quite a bit of time. I have been coating for quite a few years now. Jim Burek P.A.E. ENTERPRISES.
     

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