Bow String Length vs. performance

[RussJohnson]

I know the string is suppose to be positoned between the 2 marks on the top of the bow when at rest. My question is: Does the bow have the fastest bolt speed if it is at the mark closest to the trigger? In otherwords, when the string is a little shorter. I bought the Flemish string which had a much bigger effect on where the bolt hit the target at 30 yards then I expected. If I remember correctly, the bolts were about 3 or 4 inchs higher. I have had to twist the string 4 twists since shooting the bow 40 times to position it back to the middle between the 2 marks. I am wondering if I should be positioning the string back farther there by preloading the limbs a little more? Let me know if anyone knows how this effects the performance if at all. Thanks

[sumner4991]

The closer the string sits toward the riser, the more speed your arrow will have.

There are trade-offs . . .get too close to the riser and the string will slap it hard enough to damage the string.

[ComfyBear]

I am wondering if I should be positioning the string back farther there by preloading the limbs a little more? Let me know if anyone knows how this effects the performance if at all.

Speed is obtained by powerstroke and draw weight. Preloading the limbs does not change the draw weight. All it does is put more stress on the limbs, not a good thing. It will also increase the brace height which will shorten the powerstroke, which will in turn reduce the speed.

Edited: To correct a typo

[bob1961]

from what i hear is that all the limbs are the same from 225# bows to the 175# bows, what makes the poundage of each model is the longer or shorter power stroke....16.5" for 225#, 15.5" for 200# and 14.5" for the 175# pound bows....i found that my 200# exocet has a sweet spot just under the high brace mark by bout a 1/16" as most here have the same sweet spot too....the bow shoots a lot easier and quieter at that spot compaired to just above the lower brace mark, the few fps you gain from high to low brace mark isn't worth the abuse the lower mark gives the bow....if the string is for an excalibur then just twisting or untwisting it a bit should get you where you want it to sit, just don't untwist it to far .......bob

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[OkXbowHunter]

...and if you are using Limb Savers on the inside of your limbs, don't untwist it so far that it is close the mark closest to the riser or you run the risk of it knocking one or both Limb Savers off ...and one could come back and hit you in the eye...and that hurts...real bad...stings like a beeatch...not fun at all...it'll darn near make a grown man want to cry...or so I was told by a friend of a friend who had that happen to him one time...

[RussJohnson]

...and if you are using Limb Savers on the inside of your limbs, don't untwist it so far that it is close the mark closest to the riser or you run the risk of it knocking one or both Limb Savers off ...and one could come back and hit you in the eye...and that hurts...real bad...stings like a beeatch...not fun at all...it'll darn near make a grown man want to cry...or so I was told by a friend of a friend who had that happen to him one time...

Wow, That is exactly what happened to me! The right hand limbsaver flew right past my head at a very high rate of speed. I spoke to Limbsaver and they are sending me no charge replacements. The pre glued peel and stick pad did not come loose. It was the factory glue job holding the rubber part in that base pad from Limbsaver that came loose. The guy told me to watch out for their 2011 crossbow silencer kit next year. He said they were addressing those issues. Wish he was sending the new ones! I put them on cause Ted Nuggent uses them on his Excalibur!!

[wabi]

Low brace height means more velocity, noise, and vibration.
High brace height is less velocity, noise, and vibration.
Not a huge gain or loss either way.

I opt to keep my brace height set to where the string just touches the line furthest from the riser.

[bob1961]

I opt to keep my brace height set to where the string just touches the line furthest from the riser.

yeah that seems to be the sweet spot on my exocet .......bob

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[ch312]

ok...so how much speed would ya gain if you made up a spacer for the riser to extend the stroke by 1"?

[wabi]

ok...so how much speed would ya gain if you made up a spacer for the riser to extend the stroke by 1"?

No need to make a spacer. If you own a Phoenix simply buy an Exocet 200, or an Exocet 200 could move up to an Exomax.
That's basically the only difference in the models as far as performance - about 1" in increased rail length (power stroke).

[ch312]

ok...so how much speed would ya gain if you made up a spacer for the riser to extend the stroke by 1"?

No need to make a spacer. If you own a Phoenix simply buy an Exocet 200, or an Exocet 200 could move up to an Exomax.
That's basically the only difference in the models as far as performance - about 1" in increased rail length (power stroke).

i have an exomax and want to go faster

[Pydpiper]

It can, and has been done successfully.

i have an exomax and want to go faster

[ch312]

It can, and has been done successfully.

i have an exomax and want to go faster

you arent gonna leave me hangin like that, are ya?

[Dereck]

If you want to go faster use the lightest arrow recommended by Excalibur
350gr total weight.

I would like to see pics of that extension as well

[bob1961]

speed isn't everything ....give me a slower, heavy hitting arrow any time over a faster lighter hitting arrow any day....i have been bow hunting since 1982 and have yardage guessin down to within two yards of what the true yardage really is....i have 550gr guided missles for arrows that passthrough, er no wait blow through deer at 50 yds .........bob

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