Like the title says I need some info. Please help me, im going to be doing a 103 kit and cams. Im not planning on any head work any time soon.The cam I realy like the look of is the s&s mr103. The only thing that concerns me is the .585 lift. I contacted s&s they said the stock spring will handle that no prob, but ive seen alot saying otherwise. I know a forum member has these with stock spring, but I always over analyze everthing. So bottom line is what is a safe lift on stock springs?

 

Tman performance claims there 600Sm cam works fine with stock beehive springs when I talked with them. those S&S 585 will be fine on the stock beehives ran them for 5000 miles on stock beehives.

 

Thanks for the reassurance. Did you notice any top end noise?

 

Every time I have changed cams there is a change to the top end noise. Performance cams have higher lift, faster ramps for longer duration and with that comes more valve train noises.