adjusting let off valley

[hyj]

wanna make sure i got this straight...
Looking to gain a little more let off, valley on my gt without changing other specs. Drawstops are all the way out (towards cam top of cams) , getting aprox 76% letoff.
Twist cables and untwist string?
About 2 to string for every one to cables?

[bfoot]

wanna make sure i got this straight...
Looking to gain a little more let off, valley on my gt without changing other specs. Drawstops are all the way out (towards cam top of cams) , getting aprox 76% letoff.
Twist cables and untwist string?
About 2 to string for every one to cables?

Let off and valley are two separate things so would need to be addressed separately. Let off is hold weight and can be adjusted on a draw board with a digital scale. Valley is the transition to the wall or end of the draw. How quickly, how steep or gradual the drop off can be adjusted to some extent but is limited by the design of the cams used.
They are related but not identical by any means. There is no formula for ratio for twists cable to string and used for different things. I suggest you read Nuss&Bolts tuning guide, download is free, it is about 150 pages and explains and answers your questions better than I can. You will get many differing and conflicting suggestions and they will only confuse you and mess up your bow. Anytime you twist cables you increase draw weight significantly, you will change your cams sych, and you cam timing when you start twisting and untwisting cables unless you have a clear plan and idea of what you can expect.

The very first thing to do is to spec your string set under 100 lbs tension as string and cable lengths determine cam timing , cam synch, let off, valley really everything about your bow. The guide explains in very clear easy to understand language what twisting and untwisting string/cables will do and when to do this.

Here is the link:

http://archeryhistory.com/archerytal...of_Archery.pdf

DO NOT take any advice that says put X number of twists in the cables and X number of twists in the string. There is absolutely no way anyone can know and these are simply guesses. Will do much more harm than good.