Edelbrock Heads Factory Valve Springs With Cam Profile.

[67428GT500]

The Edelbrock heads I bought have a spring spec of 130 on the seat and 335 @ .600.
I put my cam card up to see what the peanut gallery says about use of the single spring with my cam.

[GerryP]

The springs are up to the task for that cam.

[Joe-JDC]

What valve stem diameter, head size, and retainer used?  Stock Edelbrock stuff?  When I checked the last couple of sets of Edelbrock Performer RPM heads, the springs had 140-145# seat pressure which was needed.  I don't think 130# is enough for a 3/8" stemmed valve and .560" lift.  JMO, Joe-JDC

[67428GT500]

They are .380 stem. I am changing the 2.09/1.65 valves with 2.19 INT 1.75 Exh.  The specs are for the Edelbrock springs for non-roller cam applications. The specifications you provided DD is for the roller cam ready heads.  I am hoping they don't really need to be changed. The springs on the C6AE-R I have now are about 140 on the seat and 365 @.0600. I have sold the C6AE-R heads to a forum member so I will have to pull these if they aren't enough for the cam to be safe to at least 6K
                                                                                                             

[blykins]

Pretty lazy hydraulic flat tappet.  It will be fine, but if it's a new cam that hasn't been broken in, I would use another spring. 

[67428GT500]

It was ran in on a heavier double spring.  I was debating if the springs are weak. So what is a matter with the profile?

[blykins]

It was ran in on a heavier double spring.  I was debating if the springs are weak. So what is a matter with the profile?

Nothing wrong with it, it's just a lazier lobe, so it doesn't need a lot of spring pressure.

[My427stang]

Plenty of spring