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> How To:converting rear shocks to adjust. coilovers, Boge shocks with stock dia springs
Mueller
post Jun 20 2005, 11:50 AM
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I decided to add threaded collars to my Boge rear shocks so that I could adjust the ride height (rear too high)

Normally, one buys Koni Yellows or Bilstiens and simply just slides the threaded collar w/adjusting nut over the shock and uses 2.5" diameter springs.

Due to budget constraints, I opted to keep my Welt. 140 springs (would work with stock springs) and my Boge shocks which seem to function just fine.

First step is to take the springs off, then the perch...on the Boges, the perch is held onto the shock by means of 3 formed protrusions on the shock body, I was able to just hit the perch with shock upside down to remove the perch.

I then cut the perch to fit both the adjusting nut and the inside of the collar. After the modifications, the perch is now 2 pieces instead of 1.

In order to get the smaller ID perch over the 3 protrusions, I cut a slot in it to be able to spread it apart so that I could move it lower on the shock body, I also made 3 holes in it for rosette welds to the shock.

The pictures should be pretty self explanatory of before, during and after.

I can now easily adjust the ride height....total cost was about $60 including shipping for the collars and adjusting nut.



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Mueller
post Jun 20 2005, 11:51 AM
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.....


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Mueller
post Jun 20 2005, 11:51 AM
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......


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Mueller
post Jun 20 2005, 11:53 AM
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here you can see the lip to hold the collar:



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Mueller
post Jun 20 2005, 11:53 AM
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finished shock, all painted and ready to install.


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SteveSr
post Jun 20 2005, 02:01 PM
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That's really cool Mike,but what happens to the shock when you weld on it?... (IMG:http://www.914world.com/bbs2/html/emoticons/welder.gif) any concerns about the heat?

SteveSr
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Mueller
post Jun 20 2005, 02:05 PM
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QUOTE (SteveSr @ Jun 20 2005, 01:01 PM)
That's really cool Mike,but what happens to the shock when you weld on it?... (IMG:http://www.914world.com/bbs2/html/emoticons/welder.gif) any concerns about the heat?

SteveSr

these shocks do not use the main housing tube for the piston, there is an internal tube for that, so unless one punches a hole in the tube or used way, way too much heat and welded 360° around the tube with the heat cranked up, I don't see a problem......

famous last words when I'm replacing my shocks in a few weeks, hahahahaha
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andys
post Jun 20 2005, 02:18 PM
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Mike,

Very ingeneous! Yeah, I too would've been concerned with the heat....guess it's ok??

Andy
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Mueller
post Jun 20 2005, 02:26 PM
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QUOTE (andys @ Jun 20 2005, 01:18 PM)
Mike,

Very ingeneous! Yeah, I too would've been concerned with the heat....guess it's ok??

Andy

I would have preferred TIG welding them, but no real option since I don't own one (IMG:http://www.914world.com/bbs2/html/emoticons/sad.gif)

nice and cheap option..it'll work until I decide to spend some "real" money (IMG:http://www.914world.com/bbs2/html/emoticons/wacko.gif)

I think a clamp type device could also be made to work as well as long as it didn't slide down........
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maf914
post Jun 20 2005, 02:33 PM
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Not bad, Mike. (IMG:http://www.914world.com/bbs2/html/emoticons/smilie_pokal.gif)

But someone has to ask, so...Will welding the shock body void the Koni warranty? (IMG:http://www.914world.com/bbs2/html/emoticons/laugh.gif)
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Dr. Roger
post Jun 20 2005, 02:35 PM
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Mike,

You know i've got the MIG and stick welders....

Call me on your next strut conversion... k?

I wanna' do mine also.

What was your source for the adjuster nuts and collars??
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Mueller
post Jun 20 2005, 02:39 PM
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QUOTE (rogergrubb @ Jun 20 2005, 01:35 PM)
Mike,

You know i've got the MIG and stick welders....

Call me on your next strut conversion... k?

I wanna' do mine also.

What was your source for the adjuster nuts and collars??

Roger, I have a MIG (gas) and oxy/acet. just no TIG (yet (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif) )

Coleman Racing products*, there are a few different kits, mine are the 2.04" ID collars X 5" in length...the threaded collar can be opened up somewhat if the shock body is larger.....the Boges are much smaller so it worked out great.............

*google it
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Rotary'14
post Jun 20 2005, 03:18 PM
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That looks great Mike,,

I was kicking around a similiar idea. In my research, I saw some of these on evil-bay,,,

http://search.ebay.com/coil-over_W0QQfkrZ1QQfromZR8

Do you think these can be trusted not to fail? These are priced pretty cheaply.
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Mueller
post Jun 20 2005, 03:25 PM
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QUOTE (Rotary'14 @ Jun 20 2005, 02:18 PM)
That looks great Mike,,

I was kicking around a similiar idea. In my research, I saw some of these on evil-bay,,,

http://search.ebay.com/coil-over_W0QQfkrZ1QQfromZR8

Do you think these can be trusted not to fail? These are priced pretty cheaply.

i almost went with those dirt cheap units, but they couldn't tell me what the ID of the collars are and I didn't feel like hunting down the car they list them for to measure a shock/strut.

the coleman racing units seem a better quality unit, I have 1 threaded collar with nut that i found at a pick-n-pull, looks just like the cheaper kits as seen on eBay...the fit is a little sloppier between the nut and the collar.
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Korijo
post Jun 21 2005, 07:11 PM
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mike,

did the bottom gold piece come in your kit that you ordered?

whats the proper name for that gold piece?
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URY914
post Jun 21 2005, 07:19 PM
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Where did you get the parts?

Or did you say where already?
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Mueller
post Jun 21 2005, 07:39 PM
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QUOTE (URY914 @ Jun 21 2005, 06:19 PM)
Where did you get the parts?

Or did you say where already?

Coleman Racing Products

Dave,

Adjusting nut???
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TimT
post Jun 21 2005, 07:43 PM
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koni calls it a spring perch,

Im sure the good ole boys at Coleman call it something else (IMG:http://www.914world.com/bbs2/html/emoticons/cool.gif)
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TravisNeff
post Jun 21 2005, 07:46 PM
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Damn, $25 for the set? The coilover kits that come with springs (which are $60 a pair) go for $250. OOOhhh the CSOBSC hindsight in me...
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Mueller
post Jun 21 2005, 07:51 PM
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QUOTE (Travis Neff @ Jun 21 2005, 06:46 PM)
Damn, $25 for the set? The coilover kits that come with springs (which are $60 a pair) go for $250. OOOhhh the CSOBSC hindsight in me...

$25 each X 2

yea, but with the kit you bought, I'm sure it bolted right on....the Coleman kit even with the correct 2.5" dia. springs still needs some fabrication to the top spring perch according to them...I didn't use mine since I kept stock dia. springs so I do not know for sure.........also, I'm betting your kit came with Eibach springs which are top of the line or darn near close to it.....you didn't pay too much for what you got.....
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