Edelbrock 61775 RPM head valve springs

[rtee007]

This is a 408 build. I'd like to know if the valve springs on these heads are good to go on this build, plans are for 9.5 or 10.5 CR and a Lunati camshaft with either .560/.565 or .535/.550 gross lift. I have them at the shop now being looked over.
The only other set of springs I have are MP #848 silver springs rated at .550
Edelbrock specs say theirs are good to .580
This is a Magnum block, a roller motor.

 

[rumblefish360]

Look up spring specs at Edelbrock.com and compare at Lunatipower.com. Take note of the spring pressures at the lift range your looking at of possible.

 

[IQ52]

Edelbrock's catalog say's the springs #5845 come with the 61775 head, Edelbrock's part number 5845 valve spring is 150 lbs @ 1.800", 420 lbs @ .580" lift, 1.460" outside diameter, 1.150" coil bind. And they should work fine with a hydraulic roller in the .535-.565 lift range

http://www.edelbrock.com/automotive/mc/cylinder-heads/dl/valve-springs-retainers.pdf

 

[IQ52]

Slowly it all comes out. A retro-fit hydraulic roller (Lunati 20200712 or 20200713) in a roller block with 61775 Magnum heads. Wooda been easier to have all that from the beginning.