Trick flow heads

Bewy said
I recently built a 440 with TF 240 heads & switched to BH springs. I have been using them for over 15 yrs. GM, Ford, Chrys knew what they were doing by going to BH.

BH springs require less spring tension, which reduces valve train stress. They are also less prone to spring surge because each coil is a different diameter & has a different natural resonant frequency. They do not need a damper like parallel springs which have the same size coil which causes the NRF to become additive in amplitude.

Yeah, that’s not true. I have never used a beehive spring with less pressure. In fact, at the same pressure the beehive had way less valve control. The locks and valve stems were ruined in 2 races. They look good on paper but out in the world the results are uninspiring.