C4 Rear IRS Weight
Thread Starter
Racer
Joined: Jan 2006
Posts: 288
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C4 Rear IRS Weight
What is the weight of a complete 91 Independent Rear Suspension (IRS)?
Dana 36/44 does not matter to me for this question.
I saw a thread that list weights for various components of the C4, but could not find an entire rear suspension weight.
Thanks.
Dana 36/44 does not matter to me for this question.
I saw a thread that list weights for various components of the C4, but could not find an entire rear suspension weight.
Thanks.
Last edited by Coconut; Jun 20, 2012 at 06:31 PM. Reason: Explain IRS
Race Director
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From: NEwhere Ohio
Melting Slicks
Joined: Jul 2003
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From: Canton MI
Thread Starter
Racer
Joined: Jan 2006
Posts: 288
Likes: 1
Thread Starter
Racer
Joined: Jan 2006
Posts: 288
Likes: 1
Solid Axle Weight
Here are some specs from a stock Ford 9":
9-inch Rear End Assembly Weight: 194 lbs.
1. Housing: 38 lbs.
2. Axles: Large Journal, 28-spline - 18 Lbs. ea.
3. Brakes: Massive 11-1/32 x 2½" Drum Assemblies - 26 lbs. ea.
4. 3rd Member: Conventional Diff. - 68 lbs.
a. w/Traction-Lok Diff. - 71 lbs.
Now, when you get into the lighter aftermarket stuff and disc brakes, things get lighter;
Hence, a solid axle saves weight over the heavier C4 IRS.
Last edited by Coconut; Jun 21, 2012 at 02:22 PM.
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Melting Slicks
Joined: Jul 2003
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From: Canton MI
yessss , I could've saved more weight if i went with a Fab 9 with an aluminum center section like i 1st had planned , I still punch myself in the face for listening to my friend who talked me into a 12 bolt so i can class race the car.. which i never do or ever will , he even gave me the speech of how a 9inch eats up more HP 
Thread Starter
Racer
Joined: Jan 2006
Posts: 288
Likes: 1
I like the 9", because the entire case can be removed to work on it.
The solid axle completed my coil-over conversion as well. I'm not a fan of the mono-leaf spring. It has its advantages & disadvantages like all suspension systems.
Anyway, even with the 12-bolt, you are lighter, & have a solid axle.
The solid axle completed my coil-over conversion as well. I'm not a fan of the mono-leaf spring. It has its advantages & disadvantages like all suspension systems.
Anyway, even with the 12-bolt, you are lighter, & have a solid axle.
Last edited by Coconut; Jun 21, 2012 at 04:45 PM.
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Racer
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All of my photos are kept on backup sources. I have uploaded others' photos via a link online before, but none of mine are online. In other words, I don't believe I can just upload a photo from my computer onto the forum. 
Racer
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From: San Diego Ca
Here are actual component weights from my D36
Batwing & pumpkin 60 lbs I understand D44 weight 5-7 lbs more
1/2 shaft 2@10 20
Camber rods 7
trailing arms (all 4) 10
Tie rods 5
Upright w/ wheel brg 2@ 18 36
Late caliper 2@ 7 14
Late rotor 2@ 13 26
_____
Total w/o spring, shocks, 178 lbs
sway bar and torque arm
Jim
Batwing & pumpkin 60 lbs I understand D44 weight 5-7 lbs more
1/2 shaft 2@10 20
Camber rods 7
trailing arms (all 4) 10
Tie rods 5
Upright w/ wheel brg 2@ 18 36
Late caliper 2@ 7 14
Late rotor 2@ 13 26
_____
Total w/o spring, shocks, 178 lbs
sway bar and torque arm
Jim
Melting Slicks
Joined: Sep 2003
Posts: 2,270
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From: N. Babylon NY