regarding secondary spring tension.

[Marx3]

Hi, I came to wonder... when springtension is suggested, it is mentioned as i.e. 3/4 of a turn, but from where exactly?

Is it from when the spring touches the arm on the shaft, or is it from when the tension it self makes the secondaries close???

[Paul]

to my knowledge the adjustment is always when the spring just makes contact with the arm, you go 3/4 or so farther.

[Marx3]

Yeah, thats what i figured too...
Thanks!

[Toronado]

depends on engine combination,
some big blocks need more tension
so they dont open to early, my tension
was at 3/4 & open to soon, so 1/2 worked
better and eliminated hesitation as the sec.
pop open and get limited by the pull off.
3/4 is a good place to start testing,
the idea is to have least tension without bog/
hesitation/backfiring, less tension will keep the sec.
open longer at high rpm's which is critical for
performance!

[Toronado]

that spring not only effects when it opens
but when it closes, and is directly
effected by vacuum pressure which
drops at high rpm's.