Floating valves after cam swap

[Guest]

[AkFordfan]

I rebuilt my 347 a few years ago and have been fighting increased valvetrain noise and inconsistent valve floating. The only changes during rebuild were a stud girdle and a cam swap from an e303 to an X303. Last summer I installed new valve springs figuring they were weak. Noise subsided for the first test drive until I put my foot in it. Oil pressure at idle when hot is 50 psi. Engine specs- older Ford racing forged 347 short block, edelbrock performer rpm heads,Ford racing 1.6 roller rockers,knockoff airgap port matched, Holley 670 street avenger. Any help or suggestions would be appreciated. Thanks.

[AkFordfan]

[juiced coupe]

If you replaced them with more Edelbrock springs, they are junk.

I didn't even bother saving the factory springs from my Edelbrock heads.

I'd get the measurements from the retainers and spring cups, and order a set of quality double springs.

A real nice upgrade would be the double LS style spring kit that Ford Strokers sells. Your heads may or may not require cutting down the valve guide to use them.

[AkFordfan]

I did use the same springs, I was having trouble finding some with similar spring pressure and general size.