valve springs

[vulss1ute]

just wondering if anyone has any comments on if valve springs makes a difference and how much gain on a ls1. i currently have 4 into 1 geaders twin 2 and half in exhaust over radiator cold air and maf tune.

[vxchev]

With the stock springs a lot of gen3 suffer valve float as per the dyno sheet below you notice how it dips. if your not getting a cam comp 915's are okay but if your getting a cam installed either go Comp 918's (ithink aroung $365) or aussie made dual springs (i'll post up link later) the shop I go to use them with no problems.