So 160s should set in about 148-150# after break in?…
The comps dont seem to lose as much as lesser quality springs do. And besides, they are pretty! And dont forget those shiney polished titanium retainers!
The Ti retainers are lighter, so they act like the spring has another 5# or so on it, but without the load on the lifter. Thats also the idea also behind beehives, the smaller diameter and thinner retainer, and smaller diameter top of the spring has less inertial load to close itself and the valve.
While we are on valves, front cuts, back cuts, and reduced stem and underhead diameter not only aid flow, but reduce the oscillating mass of the valve, reducing the spring requirements, AND adding HP and RPM capabilities.
The weight of the entire valvetrain also changes the requirements for spring pressure. It is hard to compare what mine or Mr. Spools springs will do in relation to yours. If we cant find 50 HP in one place, we will find 1 hp in 50 places. I like to do more with less. Weight, for one thing...
Everywhere rotating and oscillating makes more difference than static weight. I also detailed the block and heads everywhere and lost enough weight to make up for my power windows! Just sayin'
Refer to my old Chevelle in other posts...
TIMINATOR