[speedfreak]

I'm shooting an old Oregon Black Knight that I had Barnsdale build new limbs for last year. He put Vapor Trail strings on it for me but they are too long and though I've been trying to get along with it like it is I've got to shorten the DL. Can I just twist the String? Do I have to shorten the cables too? I only need .5 inch or so but with a bow like this it has to be just right 'cause there is no forgiveness to it at all. Do you guys have any idea how much speed I'll lose by losing the .5 DL? I'll top out drawing 90-93 lbs.

 

[nuts&bolts]

I'm shooting an old Oregon Black Knight that I had Barnsdale build new limbs for last year. He put Vapor Trail strings on it for me but they are too long and though I've been trying to get along with it like it is I've got to shorten the DL. Can I just twist the String? Do I have to shorten the cables too? I only need .5 inch or so but with a bow like this it has to be just right 'cause there is no forgiveness to it at all. Do you guys have any idea how much speed I'll lose by losing the .5 DL? I'll top out drawing 90-93 lbs.

Add twists to the string.
That will shorten the draw length. If you add enough twists,
then the draw length might drop 1/4-inch.

If you need to drop the draw length 1/2-inch, you probably need a new bowstring that is shorter. You can keep adding twists to the current bowstring, in order to get the 1/2-inch shorter draw length,
but the string may start to knot up.

When you have the current string, with enough twists to get the draw lenght you want,
press the bow again, and measure the twisted up bowstring
that gives you the DL you want.

Get a new bowstring and tell the stringmaker
the new bow string twisted length (finished length).
Just make sure to stretch the twisted up bowstring at 100 lbs of tension.

So, you have essentially short strung the bow.
You will lose draw weight.

The letoff percentage will also drop some.

You can get back some draw weight
by add twists to the cables
to shorten the ATA a little
and
increase the preload on the limbs, a little.

 

[speedfreak]

That's great I'll try it and see what happens; now another question. It feels like the bottom cam is breaking over a little before the top, almost feels like there are two back walls, but in paper tuning my tears are almost perfect?! Is there something I should worry about or no? Thanks for the help already.

 

[Bees]

almost feels like there are two back walls,

if it's a two cam bow it is not timed right.

 

[Deezlin]

if it's a two cam bow it is not timed right.

Bee's right about that, if you have a double bump then it is not timed right. You have to adjust one of the cables until that stops. If you are satified with the way it is shooting then it is fine, but since both of your walls are not coming in at the same time, I would say you are not getting all the let-off and you might have a shorter valley.

If you want to get a shorter draw, you can twist the string up, as N&B said. It will be difficult to get a half inch though. You might also lengthen the cables a little. Do both the same number of twists after your timing is corrected. This will cause you to loose poundage, but will allow the stops to rotate around some.

Just curious, why shoot 90-93 lbs.?

 

[speedfreak]

No good reason really

Why shoot 90#'s? 'Cause I ain't too bright from what most guys say. I got this bow several years ago and it was 80#'s when a limb cracked I finally found Mr. Barnsdale and got him to beef up the limbs a little so now it'll top out @90-93#'s. I guess I just haven't been in archery long enough to get the speed bug out of my system, I want it fast and my Hoyt is fast and easy to shoot so I wanted something that would either scream with a light arrow or sling a heavy one as fast as most guys shoot a light one. I have learned something with it though, with so much weight one the string and such hard cams my release with this bow is almost perfect every time. I guess my Hoyt lets me get lazy but that Oregon makes you pay attention.

 

[Deezlin]

I have learned something with it though, with so much weight one the string and such hard cams my release with this bow is almost perfect every time.

This is one reason many target archers use less let-off. I didn't check your profile, but if you aren't young, I hope you mainly hunt with this bow and are in good shape. The 90 lbs will take it toll on you eventually. I use to pull a lot more poundage too. I still can, but eventually, my body started giving me warning signs.