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Stuffing a FC rear end in a FB

Old 05-13-12, 04:00 PM
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Stuffing a FC rear end in a FB

Hey guys,

So I bought a FC For $900. mainly for the engine and front subframe for my FB. I dont want the rear end to be scrapped with the rest of the car. So I have decided to Stuff the FC IRS under my FB.

Reasons for swap:
1. I Already have a compleate FC rear end and all the goodies to go with it.
2.Gives me 5 bolt wheel lug
3.Big rear brake upgrade
4. I will be able to use the rear coilovers from the set ill get for the front.
5.I will be able to upgrade to 8 inch ring gear when I get a turbo diff and shafts
6. Upgrade to independent rear suspension.
7. More options

Im starting the swap today so I will update tonight.
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Old 05-13-12, 07:24 PM
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Good luck mate.

Will be great to see and FB sitting with rear wheel camber!
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Old 05-13-12, 07:38 PM
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From everything ive read its possible but extremelyyy hard due to going from a solid read to a live axle. Goodluck with it man. Im lookin forward to seeing some progress pics.
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Old 05-13-12, 11:56 PM
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Allright,
Today I pulled out the straight axle, And started sizing up the diff and the subframe.
I think the best way to do this swap is to use bits of the FC frame to ease the mounting of the FC Drivetrain.
The diff mount was easy. I used the diff mount from the FC. I cut it to size so It fitt right inbetween the FB rails. After some careful measuring welded it in place, Then welded 1/8 inch steel brackets on the sides to reinforce it.
Attached Thumbnails Stuffing a FC rear end in a FB-diff-4.jpg   Stuffing a FC rear end in a FB-diff-3.jpg   Stuffing a FC rear end in a FB-diff-1.jpg  
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Old 05-14-12, 08:12 AM
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I'm glad someone has finally decided to go through with this swap, and post pics, I'll be watching this thread!
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Old 05-14-12, 08:21 AM
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I soooo wanted to do this but wimped out!

Best of luck, I'll be following this for sure.
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Old 05-14-12, 08:23 AM
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awesome cant wait to see the end result.
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Old 05-14-12, 05:08 PM
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Right on! Thanks for the support guys!

I Just got off work. So im going to get to work on the FB.
I'll update tonight on what I get done.
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Old 05-14-12, 07:18 PM
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There was a local car in the scrapyard here with an fc swap, its not going to be as hard as most people think. You are off to a good start, keep it up.

Isaac
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Old 05-14-12, 07:28 PM
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Old 05-15-12, 12:42 AM
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Today I mounted the subframe mounts. I cut the subframe mounts out of the FC and started the size them up the the FB.
After getting a good idea of where they are going to be mounted in the car. I started cutting big chunks of my car out (Got a little to cut happy I think).
Then I Bolted the subframe mounts to the subframe and did the tedious task of making sure I had the subframe just where I wanted it. Then tack welded them in place.
I measured again after tack welding them, Then I started some sheet metal work.
Attached Thumbnails Stuffing a FC rear end in a FB-sub-1.jpg   Stuffing a FC rear end in a FB-sub2.jpg  
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Old 05-15-12, 12:57 AM
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staying tuned in

big thumbs up
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Old 05-15-12, 04:59 PM
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Old 05-15-12, 06:58 PM
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i will be watching this with great anticipation............
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Old 05-15-12, 08:47 PM
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^ You see why I am selling the GSL-SE and the GSL rear ends now..highnitro ^
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Old 05-15-12, 11:44 PM
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So today I got some more sheetmetal work done on the subframe mounts..

After getting some more sheetmetal holding the subframe in place I mounted a control arm to see what kind of clearance im going to have to make for them.. More then I thought.

I have to cut out such a large chunk of the frame rails that im going to have to make a new set of framerails.
Attached Thumbnails Stuffing a FC rear end in a FB-sub3.jpg   Stuffing a FC rear end in a FB-sub4.jpg  
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Old 05-16-12, 11:20 PM
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Hey guys,
So I Got some beefy 2x3 steel tubing for the new framerails.
The new framerails go "Inside" of the car at this point, Then go through the floor where they are welded onto the stock rails. Did a little more sheetmetal and called it a day.

With the use of a "angle finder" and a "contour gauge" the fab work wasnt bad for the rails.
Attached Thumbnails Stuffing a FC rear end in a FB-framerail1.jpg   Stuffing a FC rear end in a FB-framerail2.jpg  
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Old 05-17-12, 12:17 PM
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hmm since you have to do so much fab work, you should put the control arm on the subframe and look at where you're at, in an FC lowering the car gives you more negative camber than we want, but since you're performing surgery, you can fix this by moving the subframe UP in the car, which is the ideal fix to the problem.
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Old 05-17-12, 05:33 PM
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Yeah I did think about that, Cuz I do plan on lowering it..The subframe is as far "up" as I would want to go. Anymore and it will require a lot more fab work.

I was reading about the "camber bar" racingbeat and mazdatrix sells, and how it tilts the subframe to adjust camber..

The tech at racingbeat told me that if you can dimple the "frame" you can get a lot more camber adjustment out of it.. So I left plenty of room so I can get the most out of the camber bar.

Since the bar adjusts camber by tilting the subframe. couldnt I andjust camber by tilting the subframe mounts in the car???
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Old 05-17-12, 11:27 PM
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I had no kid today, So I spent all the time I had on it today.
I got a bunch of the sheetmetal work done. The subframe mounts are pretty much done..
Cant wait to get started on the strut towers.
Attached Thumbnails Stuffing a FC rear end in a FB-under.jpg  
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Old 05-18-12, 01:05 AM
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Wow, I really want to see this completed. The solid rear end is the only downfall in getting the FB to handle properly. This is going to be interesting.
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Old 05-20-12, 12:09 AM
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Well, The landlord stopped by and told me he wanted the car off the jack stands asap. So I put a lot of time into it to get it on the ground..

It's not done by any means, But it is on the ground.
Attached Thumbnails Stuffing a FC rear end in a FB-tower1.jpg   Stuffing a FC rear end in a FB-tower3.jpg   Stuffing a FC rear end in a FB-rearview1.jpg   Stuffing a FC rear end in a FB-rearveiw2.jpg   Stuffing a FC rear end in a FB-carm1.jpg  

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Old 05-20-12, 12:10 AM
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More pics!
Attached Thumbnails Stuffing a FC rear end in a FB-carm2.jpg   Stuffing a FC rear end in a FB-side1.jpg  
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Old 05-20-12, 02:01 AM
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This is FREAKING AWESOME!!

GREAT JOB!!
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Old 05-20-12, 01:03 PM
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THANK YOU!

I am having few issues though. I am have a lot more trouble finding a turbo II driveshaft then I thought I would.
It's either that or buy a N/A clutch and flywheel and use the N/A tranny and driveshaft that I already have.

At any rate Ill have to wait a while for funds. This swap cost me real close to $200, But now I can sell all my Turbo II swap into a FB stuff
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