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MQ 4 Link Rear Conversion

General Tech Talk

Moderators: toaddog, TWISTY, V8Patrol, Moderators

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MQ 4 Link Rear Conversion

Post by bubs »

Now that my last project a BMW with an Nissan RB20 engine conversion is complete here is the next one, with a Nissan flair again.

Here we have a leaf sprung MQ ute, it is getting a triangluated 4 link rear.

Now on to the pics.

Here is the victim
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Another shot showing the original leaf suspension
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Stripping the rear end apart
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Housing out from under the patrol amd all unnessary mounts removed
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Start of upper link mounts
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Front close up view - notice bushes welded into prevent ovaling of holes
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Rear distant view
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Close up view
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Tommorow I will complete the upper link mount and get the lower mounts hopefully installed as well. Coil mounts will be done friday to be ready to make control arms on saturday.

Enjoy

Buddy
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Post by RMP&O »

Looks good man....but I would push that diff back as far as you can since doing all the custom work. Either that or hack the chassis off right behind the new suspension. Way to much overhand in the rear on all MQ/MK's IMHO.

Keep the pics coming. ;)
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Post by bubs »

RMP&O wrote:Looks good man....but I would push that diff back as far as you can since doing all the custom work. Either that or hack the chassis off right behind the new suspension. Way to much overhand in the rear on all MQ/MK's IMHO.

Keep the pics coming. ;)
The owner is getting a new fuel tank and will lob the back off the chassis, the wheel base is long enough as it is :D
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Post by bubs »

Didn't do any last night as I went out last night. But this afternoon I got an hour on it. Heres the latest

Angely rear view
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Straight on rear view
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Front angely view
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More tommorow
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Post by shakes »

nice looking welds, love the can of "spray and cook" in the background.

just one question (and forgive my ignorance cause I still got alot to learn) how are you guys working out the angles and whatnot? I understand some is basic maths but knowing what drive's & handles ok as opposed to something that handles like a pig??

Cheers

Simon
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Post by Eddy »

shakes wrote:nice looking welds, love the can of "spray and cook"
best and cheapest anti spatter spray around .... ;)
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Post by PJ.zook »

Nice work love custom stuff, you gonna bugger off those stone age drum brakes and use discs?
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Post by bubs »

Eddy wrote:
shakes wrote:nice looking welds, love the can of "spray and cook"
best and cheapest anti spatter spray around .... ;)
Actually its shit the spray and cook, i was desperate, got some more real anti spatter now :D
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Post by bubs »

shakes wrote:nice looking welds, love the can of "spray and cook" in the background.

just one question (and forgive my ignorance cause I still got alot to learn) how are you guys working out the angles and whatnot? I understand some is basic maths but knowing what drive's & handles ok as opposed to something that handles like a pig??

Cheers

Simon
Download the 4 link calculator and read the posts by strangerover (sam) on pirate.
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Post by bubs »

PJ.zook wrote:Nice work love custom stuff, you gonna bugger off those stone age drum brakes and use discs?
Its not my car, so no I wont be :D
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Post by bubs »

Finished upper link mounts / truss - also welded back on the brake line t-piece holder
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Front View
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Now undercoated awaiting the end, there are a few spots that will get hit with the sander before final painting.
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There is more done since these photos i'll post them tommorow
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Post by bubs »

More lower mounts done

Hard to see but both lowers done
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Close up
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Underneath detail
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Control arms are almost done to, I fawked up the coil mounts (I couldn't read my own hand writing :roll: )so they will have to wait till tommorow.
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Post by V8Patrol »

bubs wrote:Finished upper link mounts / truss - also welded back on the brake line t-piece holder
Image

Front View
Image
Querry ........
The material thickness ??? it looks like its 3mm pl from the pics but I'm asuming its thicker ..... yeah ?

2ndly....
past experiance has taught me that brackets welded to the diff tend to break off unless the plates extend down past the factory seam weld on the diff tube, rotational stress's seem to be the main issue especially when the bracketry has any major height over the heighest point of the pumpkin such as youve done.
I can see that the load has been spread along the length of the housing realy well, just curious as to if there's enough across the housing...

Interesting project .....

Kingy
[color=blue][size=150][b]And your cry-baby, whinyassed opinion would be.....? [/b][/size][/color]
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Post by bubs »

yes the plate is thicker than 3mm

in regards to extending past the weld line of the housing I have not had that problem before. I do have about 150 degrees of the housing on each bracket. I had planned on adding more bracing along the length of the housing. As it is, it is no worse than standard GQ/GU trailing arm mounts.

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Post by bazooked »

looks like 3.2mm :armsup: :armsup:
buggy time............
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Post by pongo »

What sort of reinforcement is on the Bush holes. Is it just a washer welded on or is it a bit better than that?

Looks very :cool:

Good work
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Post by bubs »

bazooked wrote:looks like 3.2mm :armsup: :armsup:
wrong :finger:
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Post by bubs »

pongo wrote:What sort of reinforcement is on the Bush holes. Is it just a washer welded on or is it a bit better than that?

Looks very :cool:

Good work
A lot better than that, i'll get a pic tonight I had 50 bushes CNC machined :cool:
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Post by +dj_hansen+ »

Once again bubs... that is some awesome fabrication.

No wonder you never get your own sh!t3 finished.. your always workin on some1 elses :D

Never the less.. that is still awesome mate... arms up :armsup:
Cheers,
Dan.

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Post by bubs »

A close up of the bush that goes in the link mounts, cause some one asked to see
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Frame rails cleaned of all unesscary leaf spring stuff
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Start of coil pads
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Coil in place
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Close up with coil on of thingy that holds in centre
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Same without coil
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Post by bubs »

Hmm one step closer :D - shes gone now :D

Image
Links in - 9ish pm tonight

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Rear shot - 9ish pm

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Flexing - 11pm

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Overall - about to go on trailer at 11:30pm

:D
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Post by redzook »

just a question why didnt you just make it out of thicker material?

:?
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Post by bubs »

because thats what everyone else does

heaps of guys on pirate are using 3/16 plate for link mounts without failure, standard nissan is only 4mm plate
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Post by Timmeh »

hi, nice work on the coil set-up, and the write up which you have done!! Just a quick question, what shocks are you using with this set-up ?
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