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View Full Version : uh oh! Screamin' Cheetah



HawgEnvy
03-01-2011, 08:56 AM
figured I'd start a new thread for this one. For those that aren't UTD, I was originally inquiring of the interchangeability of limbs from an '04 Cougar 3 w Nitrous X "C" cams to an '08 Cheetah w MPro cam. According to measurements and other info,the swap would work.

I then inquired about swapping the Nitrous cams onto the stock Cheetah limbs. I was told not enough room to clear the Nitrous cams. Well, I just measured both
bows(Cougar 3 and Cheetah)and the measurements are the same. 4.25 from end of limb tips to inside of limb forks, and 3/4in across measured from inside edge to inside edge of limbs. So, I think I might give it a try. The only thing I can see needing is a custom length string. Any string-makers willing to donate to make this project happen?;) it would be awesome to present the idea to Martin. Hey,we all can dream,right:D

elkslayer4x5
03-01-2011, 09:08 AM
Well as Barry mentioned, it would be a screamer, if you can get it done. But why dismantle the 04 Cougar, better that you should take me up on my offer. :)

Brem
03-01-2011, 09:39 AM
Hawg,
last year a guy built an 09 Bengal with NOS C cams

http://www.martinarchery.com/mtechforum/showthread.php?t=6496

HawgEnvy
03-01-2011, 11:21 AM
Well as Barry mentioned, it would be a screamer, if you can get it done. But why dismantle the 04 Cougar, better that you should take me up on my offer. :)

I think you've got plenty of Nitrous equipped bows.lol. Thanks for the offer,though.

I'm sure I can get it done. Gotta be easier than a frame up rebuild on a 4x4.

Arrow Splitter
03-01-2011, 11:24 AM
Gotta be easier than a frame up rebuild on a 4x4.

I sure hope so.:eek:

A.S

elkslayer4x5
03-01-2011, 11:48 AM
I think you've got plenty of Nitrous equipped bows.lol. Thanks for the offer,though.

I'm sure I can get it done. Gotta be easier than a frame up rebuild on a 4x4.

Well I do, but my grandson keeps eyeballing my Cougar! :D

ElkSlayer
03-01-2011, 12:08 PM
I think you've got plenty of Nitrous equipped bows.lol. Thanks for the offer,though.
.

yes he does But I dont, And I want his C's
or yours ;)


Well I do, but my grandson keeps eyeballing my Cougar! :D

an your the guy that told him "when you can draw it back"..lol

HawgEnvy
03-01-2011, 01:41 PM
yes he does But I dont, And I want his C's
or yours ;)



an your the guy that told him "when you can draw it back"..lol

you should NEVER say stuff like that. I've owed my step-daughter a car since she was 12. "When you can drive I'll buy you one". Big mistake!

Hutch~n~Son Archery
03-01-2011, 01:52 PM
Kid's have a way of getting the best of us.:eek:

Hutch:cool:

HawgEnvy
03-01-2011, 03:15 PM
so once I swap the NOS cams to the Cheetah, how do I go about measuring for the string/cable length?

rjd
03-01-2011, 03:42 PM
Thinking out loud here(yes it can be dangerous).

Would it be possible to hook the old string or cable in position and use it as a gauge seeing were it falls at the other end??

Just a thought.

Hutch~n~Son Archery
03-01-2011, 03:52 PM
so once I swap the NOS cams to the Cheetah, how do I go about measuring for the string/cable length?

This guy built one, drevilmike77 (http://www.martinarchery.com/mtechforum/member.php?u=8356) click on his name contact him by his email and I am sure he can help.
http://www.martinarchery.com/mtechfo...ead.php?t=6496 (http://www.martinarchery.com/mtechforum/showthread.php?t=6496)

Hutch:cool:

HawgEnvy
03-01-2011, 04:52 PM
I sent an email and am waiting for a reply.

bfisher
03-01-2011, 05:04 PM
I sent an email and am waiting for a reply.

There's a picture of his Nitrous Bengal in the Feedback section. And it's a Bengal, not a Cheetah. Very nice looking bow now that I remember it..

Hope he answers you. He hasn't been around since September.

elkslayer4x5
03-01-2011, 07:59 PM
Copterdoc.com will know, I remember him saying the string length will be the A2A plus, and then gave numbers for each size cam. :)

HawgEnvy
03-02-2011, 02:57 AM
where you at,Copterdoc? For some reason,its only showing one thread in the feedback section though it shows a count of 800+..i don't get it

elkslayer4x5
03-02-2011, 08:12 AM
I'd think that you'd need to use the x modules on your Nos camed Cheetah, with the Cheetah short A2A, you're gonna be pulling a heck of a twist into the limbs using a cable slide set up. :eek:

copterdoc
03-02-2011, 09:06 AM
32" cables, and a 51" string.

Your ATA will be 30.5, your BH about 7.25", and your DL range with C cams will be about 25.5" to 28.5".

It might be a hair less than that, but I think you will be able to get it to your DL of 28.5".

Brem
03-02-2011, 09:26 AM
copterdoc, whats the adjusted IBO on that creation going to be? will it be any faster than the original single cam? draw smoother or is the end result just going to be a coola** bow?

HawgEnvy
03-02-2011, 09:37 AM
thanks for the info,Copterdoc. Much appreciated. Same question as above. Just a cool bow or will there be significant performance gains?

copterdoc
03-02-2011, 10:04 AM
At ~7" of brace height, the C cam will IBO about 325 at it's highest DL setting.

That's with an ATA of 36" +/- 2".

The Cheetah has a much shorter power stroke, so it will lose some speed. However, a shorter ATA also means less string has to be moved.

So, you will get back some (but not all) of what you lost in power stroke, by gaining efficiency.

I would expect an adjusted IBO of around 320.

elkslayer4x5
03-02-2011, 10:21 AM
At ~7" of brace height, the C cam will IBO about 325 at it's highest DL setting.

That's with an ATA of 36" +/- 2".The Cheetah has a much shorter power stroke, so it will lose some speed. However, a shorter ATA also means less string has to be moved.

So, you will get back some (but not all) of what you lost in power stroke, by gaining efficiency.

I would expect an adjusted IBO of around 320.

And whats the A2A of your Cougar lll ? Thats a Cougar lll Mag, right? So A2A is 36'5". :)

copterdoc
03-02-2011, 10:26 AM
And whats the A2A of your Cougar lll ? Thats a Cougar lll Mag, right? So A2A is 36'5". :)
Yes.

36.5" ATA, with a 6.25" brace height and a max DL of 28".

copterdoc
03-02-2011, 11:34 AM
And whats the A2A of your Cougar lll ? Thats a Cougar lll Mag, right? So A2A is 36'5". :)

There are a couple of things to consider, that are different about my Cougar, than the hypothetical Nitrous Cheetah being discussed.

First of all, My C3 has NOS B cams, not C's. The B cam is faster than the C cam. You just can't get it to reach a 28" DL with an ATA much shorter than 36".

Second, Even though I am only drawing it back to 28", I am getting 20" of power stroke. Going from 36.5" of ATA, to 30.5", shortens the power stroke by about 2". Also, the Cheetah has a parallel limb configuration. The C3 does not. The limbs on the C3 add about 1" to the power stroke compared to the Cheetah.

The C cam draws 3" farther than the B cam. It should just barely reach 28.5" on the Cheetah. With a 7.25" BH, that gives it a power stroke of only 19.5".

HawgEnvy
03-02-2011, 02:00 PM
so it basically would be pointless since the Cheetah w Mpro already has a 320ibo?

copterdoc
03-02-2011, 02:33 PM
Well, the Nitrous will actually get that IBO!:p;)

HawgEnvy
03-02-2011, 03:26 PM
then what about using the C3 mag limbs w the NOS cams? String/cable length? A2A?powerstroke?adjusted IBO?max draw length/weight?Braceheight?

copterdoc
03-02-2011, 03:45 PM
The mag limbs will give you a 8.25" BH and will max at about 29.5" of DL.

You will need to move the modules two holes, and you will lose 1" of power stroke. That equates to an adjusted IBO 10 F.P.S. lower than the limbs already installed on the Cheetah.

But, the string/cable lengths will still be about the same. You could add 3/4" to both the cable and the string lengths, so your ATA will measure 31.25".

HawgEnvy
03-02-2011, 07:00 PM
lol. You gotta bare with me. I'm very confused about how to figure this stuff out. How do you get the measurements? Is it mathematical(which I truly suck at)or info gained by experience?

in your opinion, what would be the best way to tackle this project? Mag limbs w NOS cams or NOS on the Cheetah limbs? My goal is a fairly stable,forgiving speed bow in a tight pkg w/o the pricetag of the big 3. Is this a pipe dream or an attainable goal?

once again,thanks for your input. I'm a tech junkie and love learing stuff like this. It's my real passion.