Editing S13 Suspension Conversion (section)

==The Rear==

Before I start, I thought about this and found there is not a single "how to" for this process, and thought it might make it easy for some people to read if it is on its own not mixed up with other information. Some people might not like the way I have gone about the process so please don’t bag me out.

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Ok first get your hands on a set of coil overs, my ones are second hand off a mate but still all good minus a slight knock in the lower part of one of them.
They're Tein coil overs, apparently they are old HRs
[[Image:S13 r31standerdshocksands13coilove.jpg|550px]]
*This is a pic of my new coil overs next to the R31 setup, you might notice they are smaller , my R31 setup is Monroe shocks with King springs (stock height springs).

Now on the bottom of the coil overs you will notice that one side is tapered and they're slightly bigger

[[Image:S13 stockendsnexttocoiloverssmall7.jpg|550px]]

What you can do is measure them against the stock shocks and cut off a part of the tapered section like so in next picture (red section is a rough guide of what I did). I cut off around 2-3mm.

[[Image:S13 bottomofcoiloverwithflangeshow.jpg|550px]]

Just keep checking to make sure you don’t cut off too much.

Next part can be a bit hard and some people don’t agree with this method.
The top hat of the coil overs is smaller and doesn't fit in the holes already in the strut top, and if you use one of the holes then the other hole that you have to drill (due to S13 rear suspension only having 2 bolts on the strut top) will be to close to the centre hole.
So we decided to drill two new holes in the strut tower, to do this we pulled the coil over apart used the top of the strut and marked it with something. To leave a mark on the inside of the strut tower we used bright orange paint (it was what we had at hand at the time) we just made sure it was centre and not too close to the other holes.
Then you need to drill these holes.  We ended up using a drill bit that was slightly larger then the stud so a 13 or 14 mm drill bit (just measure it up to the stud before hand).  And this is what it looks like after:

[[Image:S13 redrillstruttowersmall1jy.jpg|550px]]

That is the hardest part of the process over, if you haven't already, reassemble the coil over used to mark the holes.  Now you can place the coil over in the car and see how it sits.  Just check to see if the strut top holes are big enough, if not get a round file and file the hole a bit. And this is the same for the bottom just use a flat file to get it to the right thickness. 

[[Image:S13 bottomofcoiloverattachedtocars.jpg|550px]]
*view of the bottom of the coil over bolted in.

[[Image:S13 coiloversinsidestruttowersmall.jpg|550px]]
*view looking up at the coil over installed

Now as you have noticed the studs in the coil overs are smaller, I used 13mm nylock nuts with a washer.  Also be careful because it's on the edge of the raised section but the washer I used just bent into place

[[Image:S13 topsideofstruttowersmall1mb.jpg|550px]]
*not done up yet in pic.

That is basically it, only thing to do is to adjust the coil overs up to the desired height and lock them in.
This is a picture of the end result on my car:

[[Image:S13 carsideonlowerds13coiloversrea.jpg|600px]]

-Garlo

[[Image:S13 koyama sts-img600x486-1143387931san.jpg|550px]]

For anyone that doesn't want to redrill tower holes, Cusco make pillowball 3 stud tops for R31/R30 that should be easily adaptable to any brand of coilover. Its also possible to use the original hat in some instances if you use an alloy spring seat. - Dave 31GTSR



'''Compiled by:''' Killabeez, Garlo, Dave 31GTSR, Decs, Lach, are31

[[Category:Steering & Suspension]]