Boosted Falcon

Hi what valve spring are good for a boosted engine done everything to my el but won't make good power
Now I've been told to do springs so any ideas

Mine has crow doubles and made 420 rwhp with no valve float, heard good things about atomic as well.
Try doing a search should be able to find something about it on here

cheers staunchxr

Anything over 300rwhp then you need springs IMHO. Your dyno print out should show where the car struggles.. post it up?