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Super low IRS wagon build


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#1 LaidoutRivi63

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Posted 24 July 2013 - 12:55 PM

So I have been working on this wagon for some time now. I come from the traditional hot rod and custom world and I have been dying for a nice Japanese wagon to drive daily forever now. I bought it just over a year ago out of Duarte, California. It was a rag. Rust in body panels, wrecked front end, glass out of it, completely apart, etc. But it ran and was fairly complete, and the price was right. 

 

I spent a couple evenings putting what was there together and it started to look like a decent ride.

 

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If i was gonna daily drive this thing, I wanted it to be at least relatively safe, so I did a retractable shoulder harness conversion. I used the seat belts from an old 75 Corolla I had. I put a reinforcing plate in the pillar and built receptacles for the mechanisms in the rocker.

 

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#2 datrod

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Posted 24 July 2013 - 01:05 PM

Cool idea with the belts. But I have to ask why a worn out belt. How can that be safe. I'm not hatin just sayin.


I came here today to chew some bubblegum and kick some ass. Right now I'm all out of bubblegum. 

 

My biggest fear is that when I die, My wife will sell my cars for what she thinks I have in them.

 

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#3 LaidoutRivi63

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Posted 24 July 2013 - 01:06 PM

I found a rear clip for sale that I bought to do my IRS swap. Guy had nearly an entire car. I bought a door, core support, and a couple other things.

 

Fixed the front end so everything lined up. Replaced the core support and one of the fenders.

 

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Just a tip to those with wagons. The window frame is different from sedans. This door was a sedan and the window frame fell short of the door opening. I had to cut the wagon window frame off and attach it to the sedan door, using the wagon glass as well.

 

 

 

 



#4 LaidoutRivi63

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Posted 24 July 2013 - 01:17 PM

Now on to what I'm sure everyone is curious about, the IRS swap. I wanted to get the wagon down way low without invading the passenger compartment. I hacked everything stock out and started to fit everything. I built pockets for the crossmember to mount to in order to get the crossmember as high as possible in the wagon. It ended up about 2" higher than it is in the sedan.

 

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Before the pockets went in, I fixed rust and reinforced the rockers with 16 gauge. The wheel well reinforcement is 16 gauge as well that I shaped the fit the wheel well. The pockets and all structural parts of the swap are built from 14ga. 

 

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I built a jig to locate the mounting points of the irs. The jig was used through half of the swap to make it easier to access things while welding.

 

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Here the floor is done and you can see my fabricated fishplates where the suspension mounts go.

 

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Suspension finally hung

 



#5 Just Joel

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Posted 24 July 2013 - 01:31 PM

Nice.

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#6 BadWagon

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Posted 24 July 2013 - 01:34 PM

A+++



#7 LaidoutRivi63

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Posted 24 July 2013 - 01:36 PM

I put a lot of thought into how to spring the car. I drive a lot of very low vehicles and nothing makes me crazier than a low car that rides like a jackhammer. It is possible to make a very low car ride reasonably comfortable. My big Buick Riviera, for instance, rides 2-3" off of the ground and you wouldn't know it while riding in it. I also had the space constraint issues of only having about 12" from the floor to scrubline. I originally wanted to make some sort of bellcrank setup with qa1 coils but the lack of space made every design too much of a compromise. I played around with the idea of a transverse leaf and looked into corvettes. I had already figured that I needed a spring rate of about 235 lbs/in or so and it so happens that one particular year of corvettes had a rear rate of 229 lbs/in. I found a spring on ebay for $100 and went to town. These springs weigh about 10 lbs and do not fatigue like a steel spring.

 

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Spring had to be narrowed, I cut an inch and a half off of each end, redrilled and rebonded the end plates

 

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This is the difference in width. The spring rate change is negligible.

 

The stock corvette style of attaching the spring to the spindle wouldn't work because there is some misalignment that the bushings wouldn't like, so I built a heim and shackle linkage.

 

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Then I built the mounts on the spindles/arms

 

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Clamped the spring in place for a mock up run, and it sits and articulates fine.

 

My 13" Advans barely fit. I had to dolly the lips over and portopower one fender out a bit (I think it was pushed in from the accident it was in) and now nothing rubs at all.

 

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I don't have any up to date photos yet, It is almost done now. Shooting to be at cars & coffee in Irvine a week from this Saturday. Fitting the gas tank today, then I just need to finish shortening my 280zx struts and running my exhaust. Here are some photos from when I was finishing the IRS subframe and spring perch mount.

 

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#8 LaidoutRivi63

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Posted 24 July 2013 - 01:37 PM

Why the worn out belt? Because it was free. Its not as bad as you'd think. I would break before the belt did.



#9 LaidoutRivi63

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Posted 24 July 2013 - 01:39 PM

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Best pictures until its rolling



#10 Stupid_fast

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Posted 24 July 2013 - 01:46 PM

So much want..

 

I love it !!  That things going to be awesome when its finished !


My wagon build thread...And ZX.

 

 

I like the new classifieds better.


#11 jalen

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Posted 24 July 2013 - 01:49 PM

I'm jealous

"Idc I just ha drunk sex and it was AWSSOME I'm gong to bed peace botcjes"~ comicartist

My Mom always says "Procrastination is like masterbation.....in the end your only fucking yourself"

<p>

Does that include me? Someone who grew up in Venice Beach wears girls jeans daily and was a submariner for 8 years... Im like one package of eye-liner away from being full homo.


#12 BadWagon

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Posted 24 July 2013 - 01:54 PM

:w00t:



#13 Just Joel

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Posted 24 July 2013 - 02:11 PM

Wow...

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#14 twistedimages

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Posted 24 July 2013 - 02:44 PM

Very nicely done!  Looks like quality fabrication work throughout, and the transverse leaf is an ingenious solution to your space constraints.  Look forward to seeing it finished!



#15 Ratwagon1600

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Posted 24 July 2013 - 02:44 PM

Goon porn and great fab skills.

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#16 ]2eDeYe

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Posted 24 July 2013 - 02:46 PM

Excellent work on the goon and the thread. Welcome aboard :D


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#17 datrod

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Posted 24 July 2013 - 03:26 PM

Dude.

I take back that first post about the belt.  Mad skills on your end, That is some badass stuff going on under that wagon.  


I came here today to chew some bubblegum and kick some ass. Right now I'm all out of bubblegum. 

 

My biggest fear is that when I die, My wife will sell my cars for what she thinks I have in them.

 

:fu:


#18 jrock4224

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Posted 24 July 2013 - 04:12 PM

hmmmmm....  i hate u cuz that thing is sick .... heads up bro ... yor doing it right ....fer sure A+++++++++++++++++


It's very rare to find a ...
1/Datsun nut. ( they actually know and appreciate the work and expense that went into the build) and who also...
2/Can afford to buy it.


#19 jrock4224

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Posted 24 July 2013 - 04:29 PM

by the way thank u....for sharing this...


It's very rare to find a ...
1/Datsun nut. ( they actually know and appreciate the work and expense that went into the build) and who also...
2/Can afford to buy it.


#20 TENDRIL

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Posted 24 July 2013 - 04:31 PM

sooo sweet!