Need a number for Edelbrock valve springs

One thing I consider from the cam mfr's springs recommendations is that they rarely are going to be 'spot on' some exact optimum number for a spring selection. Looking at the different spring families by installed height, there are always steps in the spring rates, and some computation of the ideal spring for a particular cam is rarely going to end up pointing to some exact spring model. I am sure they just pick the closest one; whether they pick high to add margin to float, or pick low, to reduce lifter loading, I cannot say.

So that's why being off by 10% or so on rates or pressures should not worry anyone too much. Unless you are right up there in pushing RPM's or lift/rate...

rumblefish360 said

I myself would look deeper into the catolog for a different spring than the ones listed just to be sure there isn't a better one. Even IF the engine was using a 1.5 rocker, I'd still look. There is more than just a few pounds difference NOT to worry about and call good enough to just get away with.

It just makes good sense.

Click to expand...

I was gonna look at the beehive springs and this comment got me interested again. It might be good solution in this case, as they are made to fight valve float with their progressive spring rates. And they can do so with lower spring pressures, which IMHO would be good for this fast ramp cam WITH the 1.6 rocker ratio, both of which are going to increase lifter-to-lobe contact pressures.

Now, how to pick the right rate for a beehive..... I have yet to learn this. The Comp link I provided above also leads to their beehive springs....