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Thread: School me on Nitrous cams

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  1. #1
    Senior Member Ehunter's Avatar
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    Default School me on Nitrous cams

    Just got a Nitrous cammed Warthog in a trade, and I know nothing about Nitrous cams. It's a shoot through system. I will say after I threw a rest on it, I flung a couple of arrows. Other than a higher than expected holding weight, I really like the cams. VERY smooth, and seem to have plenty of zip to them. So tell me all you know about Nitrous cams. lol Thanks!
    2008 Moab 70# The deer killing bow
    2008/12 Firecat 60#--- 2010 Warthog 70#
    2009 Warthog 70#---2009-10-12? Warthog Frankenbow with Nitrous B
    2010 Strother SR-71 65# & 2012 Strother Rush 65#
    2012 Strother SX Rush 60# & 2011 Strother Infinity 70#
    BSD strings and cables

    Yeah, I know I'm grumpy and opinionated.

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    More holding weight. To me they have a softer back wall, I wish they had limb stops, just my preference. Super smooth and and super fast

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    Senior Member Tosi's Avatar
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    On my SlayeR I can shoot through and or use a cable rod and slide. I put a string stop and a few monkey tails to help the vibration and nose. I have a shoot in two weeks and I can't wait for some heads to turn.image.jpg
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    Last edited by Tosi; 04-21-2014 at 09:24 PM.
    Ranger 6
    2011 Fire Cat 400 (Custom)
    2005 Martin SlayR
    2012 Mathews z7 Magnum
    2014 Mathews Creed
    2001 PSE Excellerator

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    Senior Member elkslayer4x5's Avatar
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    Which mods are on the bow, 65% or HL (75%)? The Nitrous cams do have a softer wall, and in fact is sort of spongy. With out any limb stops, the back wall is the flats of the cams, and you can pull those flats into the cables, giving that spongy feel. Once you got the bow adjusted to your draw length, it is easy to hold against the flats as it takes some force to pull into the cables. I've included a photo with the flats indicated so that you'll know what I'm talking about. Nitrous flat.JPG
    http://eastoutfitter.tripod.com/index.html
    http://www.cascadianbowmen.org/
    Martin 06 Slayer, Nitrous C, shoot thru, 63lb, Quiktune 3000, HAA OL 5519, Beman ICS Hunter
    Martin 06 Slayer, Nitrous C, Shoot thru, 55lb, Quiktune 3000, HHA OL 5519 2X, Easton A/C/C
    Ben Pearson 1968 'Cougar' 62" 45#s @ 28" recurve, parallel shaft POC, Zwickey 'Eskimo' 2 blade

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    Nitrous cams do have holding weight which can be adjusted from 65% to 75% via the modules. The holding weight is right in line with most other bows, but the felt difference is that there is a very little "valley" at the end of the draw cycle. There is a mechanical advantage to this...more speed and also allows you to be more consistent on your hold. Your draw is always then to the one point, the end of the cycle, holding the cams against the cable stops. Want firmer? Tighten the cables up more. Or have cables made of more strands than normal or one of the firmer materials like 452. There is so much adjustability via materials and twist that you can make the bow feel anyway you want. I like the fact that when at full draw you must remember to hold against draw stops (becomes natural after a few shots).
    Addicted to Slayers or Slayr's, have more than one. Probably enjoy the mechanical side of archery the best. I have really enjoyed the articles and the stories on this site. I strive to help others with what little knowledge I have.

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    Senior Member Ehunter's Avatar
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    The cams are C's. They have the HL mods, or so they say, but at 48#'s, I've got a holding weight of 19#. That doesn't add up. Also, should the cams hit at the same time, or should the top one be slightly advanced? Right now, the top cam is slightly ahead, so I threw in a half twist on the cables, and it put it slightly behind. So I undid that. It honestly has no valley at all. My Strother SR-71 has more valley, and they are known for not having a valley. lol Apologies for the newbie questions, but with this cam and X string set up, I am a newbie. lol Thanks for all the replies!
    2008 Moab 70# The deer killing bow
    2008/12 Firecat 60#--- 2010 Warthog 70#
    2009 Warthog 70#---2009-10-12? Warthog Frankenbow with Nitrous B
    2010 Strother SR-71 65# & 2012 Strother Rush 65#
    2012 Strother SX Rush 60# & 2011 Strother Infinity 70#
    BSD strings and cables

    Yeah, I know I'm grumpy and opinionated.

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    If top cam advanced...twist the cables that connect to that cam tighter a half turn at a time. I think your shooting string has the cable twisted too much and that is increasing your holding weight. If you can, measure the twists and you should only have 1 1/2 twists per inch so for six inches of string 9 twists. If you can untwist it and then reset your d-loop you should be good to go. Nitrous "C" are smooth as butter, you are a lucky man.
    Addicted to Slayers or Slayr's, have more than one. Probably enjoy the mechanical side of archery the best. I have really enjoyed the articles and the stories on this site. I strive to help others with what little knowledge I have.

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    Senior Member Ehunter's Avatar
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    Thanks mx, I'll give it a look tonight. Got plenty of time to play with it before I decide what to do with the bow. lol Lower poundage deer bow, turkey bow, target bow.....maybe some heavier limbs I have and take it to around 55#'s.... I'll play with my options. Thanks again for the help!
    2008 Moab 70# The deer killing bow
    2008/12 Firecat 60#--- 2010 Warthog 70#
    2009 Warthog 70#---2009-10-12? Warthog Frankenbow with Nitrous B
    2010 Strother SR-71 65# & 2012 Strother Rush 65#
    2012 Strother SX Rush 60# & 2011 Strother Infinity 70#
    BSD strings and cables

    Yeah, I know I'm grumpy and opinionated.

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    Senior Member Ehunter's Avatar
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    One thing that crossed my simple mind tonight while playing with the bow. Shouldn't all 4 "X" cables have the same, or close to the same, tension? The bow seemed rather loud to me, and had a loose string sound to it when shot. Like shooting a really heavy arrow with a tight nock fit out of a very low poundage bow. Kind of a low pitched twang. I felt the cables for tension, and noticed that all 4 have rather different tensions. 2 are fairly close, the other 2 are way off on the tension. Much less tension in them. Figuring that's where I'm getting my noise from. Just seemed odd that they wouldn't all have nearly the same tension. At full draw, and rest, the cams seem to be perfectly straight. I did get both cams hitting at the same time tonight. Still higher than normal holding weight, but a bit more shootable now. Thanks again all!
    Last edited by Ehunter; 04-23-2014 at 07:05 PM.
    2008 Moab 70# The deer killing bow
    2008/12 Firecat 60#--- 2010 Warthog 70#
    2009 Warthog 70#---2009-10-12? Warthog Frankenbow with Nitrous B
    2010 Strother SR-71 65# & 2012 Strother Rush 65#
    2012 Strother SX Rush 60# & 2011 Strother Infinity 70#
    BSD strings and cables

    Yeah, I know I'm grumpy and opinionated.

  11. #10
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    They should have nearly the same tension...and require very little difference between when straightening cam lean. I have seen a few string builder's that can't get 4 in a row the same though. That makes for some frustrating tuning. I also found that if you are not within one turn of tight on the limbs they make more noise. I have experimented with good results putting gel or foam under the limbs to reduce vibration substantially.
    Addicted to Slayers or Slayr's, have more than one. Probably enjoy the mechanical side of archery the best. I have really enjoyed the articles and the stories on this site. I strive to help others with what little knowledge I have.

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