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Old 04-11-2012, 01:29 PM   #1
SubiBratz
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Default My 1978 Subaru Brat With Franken Motor [PICS]

So I pulled a mint 1978 Brat out a barn that was sitting 20 years before she saw the road again. Long story short, got tiny 1.6 running and was really unhappy about the power of the motor so MY SWAP BEGAN!!!!!!
I found a running 1991 Legacy Sedan for the brat to HUMP.
I took the entire running gear and suspension and I mean everything..
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Old 04-11-2012, 11:24 PM   #2
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This is the cross member that had to be shortened to fit the brat's body. Gave it p/s!!!

Last edited by SubiBratz; 04-12-2012 at 03:09 PM.
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Old 04-12-2012, 02:59 PM   #3
04trailsti
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thats awesome ive been wanting to see a legit brat swap for a long time. I will be following this. Ive never seen under a Brat does it share the same subframe design as 93 newer Imprezas/legacy
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Old 04-12-2012, 03:17 PM   #4
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Thanks.. I seen a whole bunch of Gen 2 brats with a swap/ adpter plates to mate engine and tran, five lug parts of 3 different subarus XT6 ect to give the car 5 lug.. LOL This is what I did...
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Old 04-12-2012, 03:20 PM   #5
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You can see the crossmember shortened with power steering and the custom Legacy A-Arms Brackets. Also a peek of the Custom Trans Mount.. Pretty COOL HUH?
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Old 04-12-2012, 03:26 PM   #6
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These are the Legacy's A-Arms welds and custom bracket..
Has anyone done this or is this the First!!!!
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Old 04-12-2012, 06:45 PM   #7
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Wow this is cool excellent work and I have never seen that online and Ive looked at a lot of conversions haha
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Old 04-13-2012, 06:44 PM   #8
Scoobie Steve
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Wow the only first I see in these pics is a 1978 brat not rusted beyond repair. You must be in the desert.

Does the EJ22 fit between the brat frame rails?
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Old 04-13-2012, 11:54 PM   #9
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Frame Rails needed to be modded to fit the valve covers. Also the Trans Tunnel wasn't going to work with the new 5 Speed trans. So trans tunnel was created....
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Old 04-14-2012, 02:00 AM   #10
Zefy
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pretty sweet!

You are not the first to do this however. I've done it. Although yours will probably be the first to run and drive...

I did it slightly differently. I used the legacy rear suspension but I used the stock brat front crossmember. I got custom control arms to mount the 5 lug stuff so I still have manual steering and such. Also used an adapter plate and used an RX transmission which is slightly smaller so it fit in the factory tunnel. Not by much though... What did you do with the tie rod lengths from shortening the crossmember?
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Old 04-14-2012, 10:10 AM   #11
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Tie Rods had to be made custom. I will get pics of the Tie Rods and show what we did. My P/S works a little to well, I can almost sneeze and take a right hand turn just from the wind.LOL This is the Rear Hubs welded.
<a href="http://www.flickr.com/photos/77121483@N04/6922394578/"
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Old 04-14-2012, 10:13 AM   #12
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This is the 2.2 Legacy motor after being pulled from the parts car.

Last edited by SubiBratz; 04-14-2012 at 10:19 AM.
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Old 04-14-2012, 10:19 AM   #13
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This is the Franken Motor..
2002 Legacy 2.5 Block
1991 Legacy 2.2 Dual Port Heads
Cometic Hybrid Gaskets
Can you say sexy...
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Old 04-15-2012, 11:10 AM   #14
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I drove it last night..... OMG can you say smiles. Feels like rocketship on rails... Need to install a surge tank had a little issue with it sucking air but I only had a little less than a 1/4 tank...
Wrx's here the little brat comes, feels alot faster than any WRX I drove, maybe all the torque this burger has.
I figure the power to weight ratio is crazy.. Like 2000lbs with I am guessing aleast 170-180 H.P. and about the same amount of torque..
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Old 04-18-2012, 11:27 AM   #15
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Does anyone know where I can get a Surge Tank for a decent price?
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Old 05-02-2012, 11:16 AM   #16
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Check out the new stance....
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Old 05-02-2012, 11:18 AM   #17
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The powerplant... Franken
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Old 05-02-2012, 01:15 PM   #18
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This.. is .. awesome!

Well done.
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Old 05-07-2012, 06:47 PM   #19
sense of nature
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Man, Well done!
Nice color too.My first Subby was a 1978.
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Old 05-07-2012, 07:36 PM   #20
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That's freaking awesome!

Did the strut towers have to be modified, or did the suspension bolt in?
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Old 05-07-2012, 08:40 PM   #21
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freaking awesome !!! nice work !!!!
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Old 05-07-2012, 10:22 PM   #22
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Thanks everyone for all the awsome feed back... Yes the strut towers need to be widened a bit to fit the Legacy's struts. Pretty much nothing was a direct fit with this project except the rear diff... direct fit... LOL
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Old 05-07-2012, 10:28 PM   #23
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The color of the car is Subaru #85. I have the window sticker for the Brat when it was purchased in WA and it told me all the options it came with...
In 1978 the car cost 5,785 and came with 22 options crazy huh?
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Old 05-12-2012, 09:50 AM   #24
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I love this build and can't wait to see more. What did you do for exhaust? I'm guessing custom but was wondering if a borla header would fit for that subie rumble. Light weight plus torquey motor is a winning combo.

Does the hybrid run well with just putting premium gas in it?
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Old 05-14-2012, 10:31 AM   #25
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The exhaust is was done by a local exhaust shop and sounds pretty mean. I dont have a borla headers and they would or I mean should fit but never tried. I plan on running this a the track to see what 1/4 mile time this thing can do. Any one want to guess what time this Brat will put down?
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