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Main Boards => PowWow => Topic started by: acollins on July 10, 2015, 09:23:00 PM

Title: Does string change spine
Post by: acollins on July 10, 2015, 09:23:00 PM
If I were to upgrade to an SBD bowstring would it increase performance enough that I would have to jump up in arrow spine. I am kind of on the line between 1535 and 3555 arrows.
Title: Re: Does string change spine
Post by: lilbobby on July 10, 2015, 09:30:00 PM
It did for me with a 6 strand, 1916 w/150 upfront to a 3555 w/175 upfront and 1/2" longer.
Title: Re: Does string change spine
Post by: culleng on July 10, 2015, 10:18:00 PM
Yes it will. I bought an SBD string and it made my arrows shoot different.
Title: Re: Does string change spine
Post by: Biathlonman on July 10, 2015, 11:27:00 PM
Mine have all shot #10-15 stiffer when going from a fat D97 to skinny SBD.
Title: Re: Does string change spine
Post by: AkDan on July 11, 2015, 06:14:00 AM
I can. But may not.   Depends on the change.

Mine also did slightly.   I went to a skinny d97 from a 15 strand d97
Title: Re: Does string change spine
Post by: Gdpolk on July 11, 2015, 06:53:00 AM
Mine did. It changed it enough that my aluminum arrows were off but my carbons were not.
Title: Re: Does string change spine
Post by: damascusdave on July 11, 2015, 09:00:00 AM
To me the string is the biggest single influence on the dynamic spine required...I have more than one bow that I have detuned with a B50 string so that I could use the arrow I want to shoot

DDave
Title: Re: Does string change spine
Post by: smokin joe on July 11, 2015, 12:31:00 PM
The short answer is yes. Give the SBD Ultra a try and you will be impressed by the increased performance of your bow.
Title: Re: Does string change spine
Post by: PastorSteveHill on July 11, 2015, 07:40:00 PM
My opinion is no, but nock fit will show different reaction from your arrows..

In other words, if your nock fits tighter, or looser, it may show different reactions...
Title: Re: Does string change spine
Post by: JRY309 on July 11, 2015, 07:52:00 PM
I noticed a difference when going from a dacron string to a low stretch string.Not a big change if any when changing to a different low stretch string materials.
Title: Re: Does string change spine
Post by: Jake Scott on July 11, 2015, 07:58:00 PM
Yup.  Found this out the hard way when I was a newb.  Changing string material can make a huge difference.  SBD strings especially can make your arrows fly weak if you are right on the verge to start with.  Serving size and nock for also has an effect.

Jake
Title: Re: Does string change spine
Post by: Caughtandhobble on July 11, 2015, 10:41:00 PM
QuoteOriginally posted by acollins:
If I were to upgrade to an SBD bowstring would it increase performance enough that I would have to jump up in arrow spine. I am kind of on the line between 1535 and 3555 arrows.
Absolutely, if you're using a run of the mill string now. A quality string will allow your bow to be all she was meant to be. The 1535's are likely to be too weak if you're border line now.
Title: Re: Does string change spine
Post by: acollins on July 11, 2015, 11:41:00 PM
Thanks for all the great information. I really appreciate it.
Title: Re: Does string change spine
Post by: damascusdave on July 12, 2015, 12:45:00 AM
My Kodiak Deluxe bareshafts fine with 500 spine carbons and a B50 string...with a BCY-X string I shoot 340 spine...like I said a string can make a big difference for me

DDave
Title: Re: Does string change spine
Post by: LBR on July 12, 2015, 05:18:00 PM
There are tons of variables to consider.  You may have to swap arrows or point weight when changing to a different string.  Will it be due to an performance difference?  Comparing apples to apples, if you pick up 5 fps that is huge.  Most people's release will vary about that much.

If you change silencers/silencer placement;  if you swap from a glove to a tab or vice-versa;  if you change nocks or serving size; if you change your brace height...all of these and more can affect arrow spine.

The only way to know if you will need different arrows is to try and see.  The better you tune and the better/more consistent your release, the less chance you will need different arrows.

To check performance difference, shoot through a chronograph.  That's usually an eye-opener for those who haven't done it.