from what I can tell from searching, the general rule is dual springs for anything over .6 lift and springs should be checked every 10-15K miles on a "bigger" cam.

What is the the biggest cam you can run without having to check springs?

Would a cam with more duration but lower lift be better for not having to worry about springs as much?

Do springs wear as fast if the car is a DD that isnt constantly seeing high RPMs or is it just the miles that wear springs regardless or RPM and driving style?

Thanks for any input

 

Bump. Any opinions out there?

 

Springs fatigue as a function of being compressed...the more distance they are compressed, and the more times (cycles) they are compressed, the more they fatigue.