Edelbrock valve spring replacements

Aussie Charger said
Well, I don't want to get into a big argument about beehives vs duals, but I didn't have a great experience with Pac, either - which is why I ended up with Manley springs.

If you don't all know this already, then the trick with beehives is to shim them to within .050"-.060" of coil bind so that the springs dampen each other when they are compressed. This is vital, as Beehives have no inner damper and rely on reduced retainer and spring weight to help stablise the valvetrain with lower overall pressures.

I saved a good deal of weight moving from a single spring with damper to a beehive. However, this was in part offset by the heavier 1.65 T&D rockers I installed at the same time. The T&Ds have good geometry, but they are quite a heavy rocker compared to others.

The caveat is my engine revs to 7,000 max - most gear changes at the track are around 6,500rpm - so it's not a rev-monster by any means.

I did have them shimmed. The engine ran to 8500. It is a race engine. Not a streetcar.

To this day I won't use a beehive, unless they come up with something different than they have now. As long as engine speed is down, you don't run a ton of lift and the lobe is easy on parts you can probably use them.

In any case I can see no benefit to them. The guys using them to get rocker clearance just don't have the geometry correct.

What pissed me off was I bought the heads with the parts that the guys who made the head said to use. I never do that. For a reason. And this is one of them. I'd have never picked a beehive spring.

As it was, I still had to remove the original seats and switch to NB seats for the Ti valves. That company wanted to use ductile seats. I don't use ductile seats and Ti valves.

It was a regular cluster flop. Now, it's a race winning engine that will go two seasons on a valve job with 50* seats.

I didn't buy loaded heads before that, and I'll never do it again after that. That was why I asked if I could buy the new TF heads empty. And I'd rather not have their port work done on them.

If I can't buy them the way I want, I won't use them. Been there, done that.