It comes down to the acceleration rates of the cam profile. The
faster the cam opens and closes the valves, the more spring tension you
need, all other things being equal.
CR
Paul Osborne wrote:
> Hello, Looking for input on the advantages/better choice of single or
> double valve springs on a 18v head.
> I am rebuilding a head and it has double valve springs , but I have a
> new set of singles from and other project that I did not use. I see know
> reasons that I should not use them. Comments please . thanks
>
> paul
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