I have the opportunity to buy a ported and polished GSR head with all Ferrea valvetrain. I have searched and came up with no information on the bee hive valve springs which are single spring, not dual. Anyone have experience or opinion on using these? My plan was to run either Skunk2 Stage 2 or a similiar cam. The head was worked by GTP in Houston, TX and has the springs listed above along with 6000 series valves, titanium retainers. This head was supposed to have flowed 330cfm on the intake side, not sure of the exhaust. Seems everyone just uses Skunk or Supertech valvetrain. Thanks for any info. This would be going on an ITR internal B18C with approximately 11.6:1 compression used for all motor daily driver/drag racing.

Just a little worried about using a single bee hive spring vs. a dual valve spring.

 

I don't have any personal experience with them, but based on their literature and some else that I've read, the design is different and is more of a 'progressive' spring rate but is fully capable of handling high rpm's like a dual spring design. I'd have to go back and look at the specs, but the coil bind rating is just as god if not better than the others out there iirc.

 

It all depends on the rest of your valvetrain. Remember, it works as a system, so unless anyone has used that spring with that cam, those valves, those retainers, and at the same installed height, no one really knows how well it will turn out.

Beehives typically have less pressure than dual springs, so they won't typically handle the same RPM a dual spring could, but they work well for the pressure that they do produce because they have superior characteristics in regards to harmonics. In other words, they are a very efficient spring. They can control the valves very well without exerting much pressure (ie friction and heat) on the rest of the valvetrain.