Valve springs for 383

[BGarff]

What valve springs would you guys reccommend? Here are the cam specs:
Cam Style:Mechanical flat tappet

Basic Operating RPM Range:2,400-6,600

Intake Duration at 050 inch Lift:241

Exhaust Duration at 050 inch Lift:241

Duration at 050 inch Lift:241 int./241 exh.

Advertised Intake Duration:284

Advertised Exhaust Duration:284

Advertised Duration:284 int./284 exh.

Intake Valve Lift with Factory Rocker Arm Ratio:0.528 in.

Exhaust Valve Lift with Factory Rocker Arm Ratio:0.528 in.

Valve Lift with Factory Rocker Arm Ratio:0.528 int./0.528 exh.

Lobe Separation (degrees):112

Camshaft Gear Attachment:3-bolt

Intake Valve Lash:0.028 in.

Exhaust Valve Lash:0.032 in.

 

[Wollfen]

I would use OEM replacement springs used originally on the HP motors, they have a damper spring coil inside the main spring. The reason I say this is that while your cam is more than standard, you don't want to go to double valve springs which put a lot more tension on the valve. this also leads to a lot more load on the cam lobes when running and could eventually lead to premature wear if you use the car as a daily driver. Food for thought.

 

[70bigblockdodge]

I think Mopar performance recommends dual valve springs for that? I would call comp cams and see if they have a single above the 911 spring and use a titianum retainer to take just that much weight off valve tip at 6600 rpm.

 

[BGarff]

I would rather wear down the cam a few thousand miles sooner than have the slightest bit of valve float before redline. And is it really possible to have no float with .528 lift at 6600 rpm?