Installing Metal Cloak 2.5" Duroflex Kit today, questions - JKowners.com : Jeep Wrangler JK Forum
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post #1 of 30 Old 11-23-2013, 08:42 AM Thread Starter
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Installing Metal Cloak 2.5" Duroflex Kit today, questions

Does anyone have the approximate control arm lengths for the 2.5" lift?

The guys at Metal Cloak don't have instructions for each of their lifts. They give generic instructions for their 3.5" lift and then basically say that if you have a 2.5" lift, take it to a 'professional'. No knock on you 'professional' shops, but I don't need anyone to install my lift. Just some basic instructions would be fine.

Anyone have some measurements?


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post #2 of 30 Old 11-23-2013, 09:44 AM
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Control arm length is a byproduct of what matters.

The upper and lower bump stops need to be concentric (fore-aft) at full bump, the axles need to be square to the frame, and pinion angle/caster needs to be correct. Get those right and let the lengths be what they will be.
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post #3 of 30 Old 11-23-2013, 09:55 AM
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It is simple geometry.
A squared x B squared= C squared

Where A is the length of the factory control arm B is the change in suspension height and C would be the length of the adjustable control arm.

This would be used to find the lower control arm length to place the axle in the factory location centered in the wheel well. Adjust the uppers for proper pinion/caster angles.

Some build info here:
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post #4 of 30 Old 11-23-2013, 10:04 AM
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Why not just start with the 3.5" lengths and adjust from there? You are going to adjust them anyway even if MC gave you a set of lengths to start with. I bet you would find it not so big of a difference in lengths anyway.

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post #5 of 30 Old 11-23-2013, 10:18 AM
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I saw something on this in "new posts", did you not get it?

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post #6 of 30 Old 11-23-2013, 10:49 AM
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Center the front axle so that the spring perches are alignedd with the upper control arm and then use the lower control arm to adjust the caster and/or pinion angle. The rear axle is just the oppposite. The lower control arm is used to center the axle and the upper control arm is used to set the pinion angle.

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post #7 of 30 Old 11-23-2013, 10:54 AM
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Control arms don't have "duties." Adjusting either pair will result in a fore-aft and rotational change. Following the "duties" methodology indicates a geometryic misunderstanding.
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post #8 of 30 Old 11-23-2013, 06:54 PM Thread Starter
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Quote:
Originally Posted by 4wdave View Post
Center the front axle so that the spring perches are alignedd with the upper control arm and then use the lower control arm to adjust the caster and/or pinion angle. The rear axle is just the oppposite. The lower control arm is used to center the axle and the upper control arm is used to set the pinion angle.
Makes perfect sense, thanks.

My main complaint was the instructions. I mean, installing a MC 2.5" lift on a 2D JK - each control are should measure x" or at least get you 90% of the way there.

Good news is that the front is done and I'll get the rest finished up tomorrow.

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Last edited by BigMike; 11-23-2013 at 07:05 PM.
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post #9 of 30 Old 11-23-2013, 07:10 PM
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Yeah that is the one item they need to figure out. Telli guys tours on the 2.5" system is dumb.

I would pull of some other instructions (poly/rk) see what they recommend for lenghts and use that as a starting point.

Something I had to do when I ran poly coils and Rk arms

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post #10 of 30 Old 11-23-2013, 07:39 PM Thread Starter
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Big thanks to Toycollector (Mike) for stopping by today and lending a hand.


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post #11 of 30 Old 11-24-2013, 08:20 AM
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BigMike,

It was a pleasure. First time I helped wrench on anything so clean. You sure you are gonna get that thing dirty ??
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post #12 of 30 Old 11-24-2013, 09:15 AM
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You can't really give a set number on Ca lengths. No two jeeps are going to be alike. Weight and overall height, bracket positions from the factory, aftermarket/stock driveshafts, etc.
Too many variables.


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post #13 of 30 Old 11-24-2013, 04:00 PM Thread Starter
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Quote:
Originally Posted by kjeeper10 View Post
You can't really give a set number on Ca lengths. No two jeeps are going to be alike. Weight and overall height, bracket positions from the factory, aftermarket/stock driveshafts, etc.
Too many variables.


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Yeah, I get that. But they give measurements to get you very close for the 3.5" lift, why can't they do it for the 2.5" lift. But if you take 10 stock Jeeps and install the same lift on all 10, I'll bet the control arm lengths are within an 1/8" of each other with most being identical.

I got it dialed in pretty close and will tweak it from there.

The overall lift gain from this 2.5" lift is 4.25" in the front and 4" in the back.



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post #14 of 30 Old 11-24-2013, 04:06 PM Thread Starter
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Quote:
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BigMike,

It was a pleasure. First time I helped wrench on anything so clean. You sure you are gonna get that thing dirty ??
I was going to go on the GATR Thanksgiving ride on the 30th but I'll be in Waynesville, NC for the weekend. Hoping they have a ride in December. It's way too clean, but it was nice not having to deal with dirt, rust, or grease when installing the lift. It now has 45 miles on the odo.


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post #15 of 30 Old 11-24-2013, 04:16 PM
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Jesus that's high. Assuming she will settle some ?

Looks fantastic though !!!


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post #16 of 30 Old 11-24-2013, 05:55 PM Thread Starter
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Quote:
Originally Posted by kjeeper10 View Post
Jesus that's high. Assuming she will settle some ?

Looks fantastic though !!!


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Pretty sure that MC measures their lifts based on a steel bumpered and armored JK. ACE Pro Series bumpers should be here on Wednesday.


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post #17 of 30 Old 11-24-2013, 06:27 PM
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Mike,

I swung by on my bike around 1:30ish but your door was shut so figured you were either finished or hadn't started yet. It looks great, and let me know if you need a hand with the bumper(s).
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post #18 of 30 Old 11-24-2013, 07:31 PM Thread Starter
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Mike,

I swung by on my bike around 1:30ish but your door was shut so figured you were either finished or hadn't started yet. It looks great, and let me know if you need a hand with the bumper(s).
Thanks! You should have pounded on the door. Too cold to leave it open. By the time John got there at 12:30, I had the rear installed. Spent the next few hours going over it and installing the swaybar links and front track bar. Rides like a dream.


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post #19 of 30 Old 11-24-2013, 08:38 PM
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Looks good Mike.
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post #20 of 30 Old 11-24-2013, 08:45 PM
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^^ X2. now I know how mine will look when I get around to installing my lift. Seems a bit taller than I expected. was hoping you might post your C/A's measurements when you get them dialed. thanks

Mike M

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post #21 of 30 Old 11-25-2013, 05:38 AM Thread Starter
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^^ X2. now I know how mine will look when I get around to installing my lift. Seems a bit taller than I expected. was hoping you might post your C/A's measurements when you get them dialed. thanks
I'll be sure to post them up. I will probably wait until after I install the bumpers and winch to dial it in (couple of weeks).


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post #22 of 30 Old 11-25-2013, 11:51 AM Thread Starter
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Update:

Talked to Matson at MC. They are in the process of putting together specific instructions for all of their kits. Great news and I'll still post up my measurements.

Ride quality. I have less than 20 miles driving on the lift so it is a bit difficult to give a good review. I'll post more as time goes on. My initial thoughts are that I can feel a difference in the suspension but more from the agressive tires. I have 28lbs in the tires and haven't done a chaulk test on them yet. The ride quality is good and a little more firm than stock - which is to be expected. The JK feels very planted and is more responsive to steering input and not vague like it was stock. The ride quality is so far above that of my '09 Rubicon that had the stock suspension and a 2.5" RC spacer lift.

I'm looking forward to getting the bumpers, winch, and some armor installed and I think the ride will get even better. I drive between Atlanta and Daytona about every 2 months and will see how it feels after driving for 6.5 hours. I made two 12 hour (one way) trips in my '09 and while it didn't kill me, it took its toll on me.


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post #23 of 30 Old 11-26-2013, 06:07 AM Thread Starter
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Quote:
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The overall lift gain from this 2.5" lift is 4.25" in the front and 4" in the back.

Will @ Metal Cloack contacted me yesterday after he saw the results of my lift. He asked me to check the part numbers on my springs. They sent the 3.5" springs instead of the 2.5" springs. Makes sense now. The kit comes in 5 boxes where 2 of the boxes are the front and rear springs. Easy mistake to make. Changing out the springs is no big deal so I'll slip the new ones in when they come.

I'm getting my bumpers today and will install them on Sunday. If the new springs are here I'll put those in and dial in the control arms. It will be interesting to see the pictures between comparing the two lifts. You will get to see the same Jeep/setup with 3.5" and 2.5".


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post #24 of 30 Old 11-26-2013, 01:07 PM
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If possible, could you post the part#"s for the springs as well when posting the CA measurements. The 2.5" is in my future plan & the parts#'s would be good to have to double check. Thanks.

Can't wait to see how the Jeep look with the 2.5" springs.
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post #25 of 30 Old 11-30-2013, 09:28 AM
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Mike, let me know if you need a hand. We're so close, I'd be happy to make a run over there again, plus it keeps me out of trouble.
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