LS6 springs are installed, quiet as stock, fingers crossed they hold up.

 

You should feel pretty confident that you're good to go, haven't heard of many, if any problems with the LS6 springs and Lingenfelter cams (which are ground by Comp btw, last I checked )

 

Just an FYI, not saying everyone's setup may react the same. My LS6 Blue Springs are holding just fine with a HT1 (214/218 .555/.562).

 

What length pushrods should I use with my ls7 lifters





On Topic: I ran the gt2-3 with yellow z06 springs for 20,000 miles with zero issues in my 04 SSS..How does a manufacturer of a spring determine what lift it is good to?

 

Once you have determined the pressures you need, you can select a valve spring with the appropriate length by taking into account the amount of valve lift in you setup. Start with the installed height needed to get the required seat pressure. Subtract the maximum valve lift plus at least 0.050-60" for coil clearance. If the installed height minus the sum of the valve lift plus 0.050" is more than the coil bind height, the spring has enough lift. Of course, you will still need to check for interference between the retainer and the valve guide, the rocker and the retainer, etc. If the numbers indicate the spring is too short, you will need to pick one with a similar rate but a higher installed height. Special valve retainers or longer stemmed valve may be needed to accommodate higher lift. Some engine builders prefer to keep coil clearance at a minimum. This tends to have a dampening effect on the coils, potentially preventing harmful harmonic vibration. If this approach is chosen, each spring must be carefully checked for adequate clearance.