Need Advice on speeding up my setup
 

Here is what I have.
Tomcat by Bowtech
Rest is a whisker biscuit. (That has to stay on for hunting)
XX75 2315 500 grains total.
shoot with a loop.

Papers on it tested at the factory at 281 fps with a 350 grain arrow.
Current arrows are 500 grain with the shaft being 29" and chronographed at 228.

Main question? What could I expect to acheive (fps) by going to a good, tough, but light carbon. Also please give me recommendations on a good carbon.


Edited by - wooly on 09/22/2002 08:53:19

Edited by - wooly on 09/23/2002 05:24:37

RE: Need Advice on speeding up my setup
 

There are so many good carbons out. I use Carbon Express. Sometimes I think they are too light. I also have a dozen Beman Camo Hunters. They shot well, but are a bear to get out of the 3-D. If I was looking for a new shaft, I think I would go back to Easton ACCs. I never had a problem with them except for the price!

RE: Need Advice on speeding up my setup
 

For kicks I picked up 2 doz of the Cabelas Carbon Hunter arrows, while they are nothing to look at they shoot fine. Only down thing is that the vanes are getting torn off by the WB rest, but I have heard that will happen with any of the "factory" mtd vanes?? They are only $47.95 p/doz and include inserts and tune nocks

RE: Need Advice on speeding up my setup
 

Wooly,
It's actually pretty easy to estimate the possible speed numbers for your set-up. Since a bow only has one efficiency level and KE changes little from one arrow weight to the next, coming up with estimates is easy in your case since you have already established a known chronographed reading.
KE will only increase slightly from the lightest to the heaviest arrows, and in your case where you want to decrease arrow weight, it will DROP slightly over the changes to a progressively lighter arrow.
As speed increases, arrow weight decreases and KE follows accordingly with only slight changes from weight to weight. KE from my testing usualy only rises 1-2ft lbs over the long haul from light IBO specs (5gr/lb) to a 450+gr arrow weight.

Your known numbers are below the factory levels due to the string loop, and possibly the Whisker Bisquit robbing some speed(and maybe a peep or string silencers?)In any event you've lost 9-10fps over BowTech's bare string level.

Here are the numbers as I see them......

FACTORY:
350gr = 281fps = 61ft lbs of KE

YOUR KNOW LEVEL:
500gr = 228fps = 58ft lbs of KE

ESTIMATES:(+/- probably 1-2fps)
475gr = 234fps = 58ft lbs of KE
450gr = 238fps = 57ft lbs of KE
425gr = 243fps = 57ft lbs of KE
400gr = 253fps = 57ft lbs of KE
375gr = 262fps = 57ft lbs of KE
350gr = 272fps = 57ft lbs of KE

There's a bunch of good light to med weight internal component shafts on the market now......I personally like the Carbon Express "CX" and their "Terminator Selects", but theres also Carbon Impact Fat Shafts,Gold Tips etc.......

RE: Need Advice on speeding up my setup
 

thanks for the info guys. Matt / PA I emailed you with a couple more ?s. Thanks again.