ILF Question

Can someone refresh me on ILF weight adjustment? If the limbs are marked #43 how far down in weight can I take them and how many turns and  #s per turn down. TNX

[tracker12]

That is going to be very Brand specific.  Some base weight on a 25" riser.  The Titan is based on a 17" riser.

[katman]

Depends on the riser maker, 4-5 turns out from full in is the norm. Up to 10% adjustment usually, that's 5% up and 5% down from midpoint. To make it more confusing some limb makers measure/mark weight at full in, others mid point. Also 43# can be the weight on a 25" ILF riser, the standard, or on a different length riser depending on maker. Going down in riser length may increase weight but not always depending on limb pad angles.

Although its ILF, makers feel free to do it there way. Specific riser and limbs would help answer Q.

[old_goat2]

Weight can be adjusted about 10% so on 43# you have 4.3#ish adjustment. Four turns out is max I turn out my limb bolts, but my normal procedure is to start at three turns out adjust the tiller and then I have some direction of adjustment in both directions. I "THINK" the instructions say two to four turns out for one ILF that I have instructions for, so that would make it 2.15# per complete revolution on a 43# bow. Hope that helps.

[Wheels2]

Sadly the limbs are marked differently.  Some are set to minimum poundage (TT) while others are mid-range (two turns out).  Hoyts are set for max poundage.

What limbs are they and what riser?

This is a Morrison Mini 13 Riser and Centaur longbow limbs marked 43# which is I think the max.

[old_goat2]

I have a Morrison Mini 13 set up that I'm shooting in preparation for turkey season, I haven't scaled it, but it seems to have much different limb pad angles than my other risers, so it may be different than most. Might be best to contact Morrison and ask them, post what you find

Morrison site says 20 degree limb angle on mini 13, max 5 turns out will drop 4.5# +/-.2# So that's about a pound per turn, down to about 38#-- does that sound right??

[old_goat2]

Yes if your limbs are marked at max preload, if they are marked at minimum preload then the bolts out 4or5turns is where they would be 43lbs, if they are marked for medium preload then they would be around 40/41. The only thing standard about ILF is how the limbs attach

[southernarcher]

Wow! Clear as mud.

[ron w]

Been my experience that Morrison risers are just a bit heavier that the limbs marking regardless of the length. Give Centaur a call and ask him if the poundage is max. or min. Jim will get back to. And yes it's about 1# per turn on them all.....most of the time....lol!

You'll have about 10% weight adjustment when limbs are set in the middle of their range.

[JRY309]

What is the length of the riser are the 43# limbs marked for.Some are marked for a 17" riser,some for a 19" riser and Olympic limbs are for a 25" riser?

[nineworlds9]

Centaurs are measured on a 17" riser I believe.  Bolts in.  Shorter riser generally adds a few pounds.  So on your 13" Morrison I would estimate about 47-48#@ 28 bolts in, about 43-44 bolts out and around 45-46 midway.  you need a bow scale to really know for sure.