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Need to RAISE my VR4 in the rear, what are my options?

BrandonEchols

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Jan 18, 2010
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Anchorage, AK
Ok guys, I know I've been on hiatus from these boards awhile... long story short - I'm coming up on HOPEFULLY finishing my Evo Brembo swap, I got the 3000GT rear trailing arms on, etc, everything bolted up and set it down to check before filling and bleeding the brakes and this is what I get:

Front looks fine

IMG_20150828_100233.jpg

IMG_20150828_100240.jpg

IMG_20150828_100337.jpg


Back... not so much. Camber is all outta whack, and the tires are scrubbing the wheel wells - not what I want. Need to get the same height all around

IMG_20150828_100308.jpg

IMG_20150828_100343.jpg

IMG_20150828_100318.jpg

IMG_20150828_100327.jpg

IMG_20150828_100401.jpg


I'm running Evo Bilsteins for the whole car, and they were fine on height before I swapped over the 3000GT components.
Anyone have some insight or ideas? This thing has been so frustrating I'm really regretting taking it on all together at this point. /ubbthreads/images/graemlins/banghead.gif
 

89Patches

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Jan 30, 2013
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How is the front fine? Looks way too high. The only I can think of to get the back a bit higher is to run 2G upper shock mount or different springs /ubbthreads/images/graemlins/dunno.gif
 

BrandonEchols

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It is a little high for a lot of places, but the extra clearance is nice when you've got feet upon feet of snow that tends to fall (sometimes overnight) up here.
 

Fiascoxl

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Jan 25, 2013
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Stuarts Draft, Va
Looks like the front should come down 2" and the rear up 1"? That should fix the negative camber in the rear too.

edit: in your case with snow 2" up in the rear and 1" down in the front. Time for a spring change
 
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tyeler18

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Jul 16, 2012
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Casa Grande, AZ
What springs are you on? Obviously it shouldn't matter if it was fine before swapping. I assume same wheel setup before as well? And all you swapped over were trailing arms and brakes?
 

tektic

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Dec 19, 2012
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ronkonkoma, ny
Do you have the full rubber spacer in the top? How do 3000gt rear springs fit? See if you can get the length on them.
 

FlyingEagle

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Whatever is installed in the rear, assuming the same rims before hand, made your track wider.

You won't be able to camber in those tires no matter what you try.

It would be adviseable to post all the parts you are using, from front to back.

Your car is undriveable in that condition, as I am sure you are aware.
 
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tektic

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With longer upper control arms it shoud be manageable but will probably still need to lift it. How about stock galant rear springs?
 

cheekychimp

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Quoting FlyingEagle:
Whatever is installed in the rear, assuming the same rims before hand, made your track wider.

You won't be able to camber in those tires no matter what you try.

It would be adviseable to post all the parts you are using, from front to back.

Your car is undriveable in that condition, as I am sure you are aware.



Tim, this swap definitely makes the track wider, it's the 3KGT hubs with the drum handbrake but it shouldn't affect the geometry between the rear subframe and the hub. Something else looks to be seriously wrong here.

Brandon both my cars are in the yard outside and both have this swap. Neither looks anything like that front or rear. One thing though, both cars do have coilovers so I honestly don't know how mounting points on fixed height suspension would work at both ends for this. As suggested by Tim make a list of all the parts you used particularly what year / model they came from and if it was a turbo or NA.

Also does anything look funky under the car? Can you get any shots of anything that doesn't look right with the geometry at either end? If something stands out post up and I can grab some pics from under my car. Should be able to figure it out mate. I'm a numpty but my cars are living proof it is possible. If I can't get you an answer, Ken certainly can.

The excessive camber bothers me, I can't help but think something is way off there but I also have a feeling the EVO struts are an issue. Don't you have to play about with springs to get the VR4 to sit level after using EVO struts? I'm betting that is at least part of the issue.

Edit: Also, what's the offset on those wheels?
 
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cheekychimp

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I apologize for the state of the black car ... it's a work in progress ... sort of! /ubbthreads/images/graemlins/rofl.gif
 

CutlassJim

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Think about this logically. The height of the wheel in the well is determined by

1) The length of the strut assembly
2) The spring rate of the spring
3) The weight of the rear of the car
4) The location of the upper strut mount
5) The location of the lower strut mount

From your post it seems like 1,2,3, and 4 didn't change. That only leaves #5. I was under the impression that the lower strut mount on a 3KGT arm was in the same spot relative to the hub centerline of a 1G/GVR4 but I could be wrong. It should be easy enough to check. If it's the same like I thought then that leaves something to do with the strut assembly.

Take a day off to get un-pissed at the thing and go back and double check the assembly.

Out of curiosity I'd also like to know what springs you are on.

EDIT: If those are Evo 8 Enkei's then the offset is +38
 
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strokin4dr

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Savannah, GA
Quoting cheekychimp:






Paul, didn't you have the evo wheels machined down a bit to achieve less poke?
Looks really good btw.
 

iceman69510

Turn Right Racing
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If he has Evo suspension with no changes to springs or mounts, then 1, 2 and 4 have all likely changed as well. Need the complete component list as has been mentioned earlier.

Quoting CutlassJim:
Think about this logically. The height of the wheel in the well is determined by

1) The length of the strut assembly
2) The spring rate of the spring
3) The weight of the rear of the car
4) The location of the upper strut mount
5) The location of the lower strut mount

From your post it seems like 1,2,3, and 4 didn't change. That only leaves #5. I was under the impression that the lower strut mount on a 3KGT arm was in the same spot relative to the hub centerline of a 1G/GVR4 but I could be wrong. It should be easy enough to check. If it's the same like I thought then that leaves something to do with the strut assembly.

Take a day off to get un-pissed at the thing and go back and double check the assembly.

Out of curiosity I'd also like to know what springs you are on.

EDIT: If those are Evo 8 Enkei's then the offset is +38

 

CutlassJim

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He specifically said in his post that he was running the same suspension setup BEFORE the swap and it was fine. So from before the swap to after the swap 1,2 did not change. 4 would only be changed if he sawzalled the sheetmetal off the car and welded the perch in a different position, which I don't think he did.
 

cheekychimp

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Quoting cheekychimp:






Quoting strokin4dr:
Paul, didn't you have the evo wheels machined down a bit to achieve less poke?
Looks really good btw.



Yes, I think we took about 3mm off the inside just at the rear bringing it to roughly +41 (thanks Cutlass /ubbthreads/images/graemlins/smile.gif) which seemed to work pretty well with the widened track. Still some camber at the back but it all seems to be in spec with no uneven tyre wear so I'm happy! Ironically I have a tiny spacer up front (about 2mm just to clear the 3KGT calipers) I'm probably going to have the calipers shaved and remove that spacer at some point but it is another thing I haven't got around to yet! /ubbthreads/images/graemlins/smirk.gif
 
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CutlassJim

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Shaving 3mm off the wheel hub of a +38 wheel would bring the offset to +41. /ubbthreads/images/graemlins/grin.gif
 

cheekychimp

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Quoting CutlassJim:
He specifically said in his post that he was running the same suspension setup BEFORE the swap and it was fine. So from before the swap to after the swap 1,2 did not change. 4 would only be changed if he sawzalled the sheetmetal off the car and welded the perch in a different position, which I don't think he did.




I've been thinking about this. Given that Brandon was using the exact same suspension setup both before and after, that, by a process of elimination, now makes me question that lower strut mount. Sure it is essentially located at the same point, everything bolts up without modifying anything (other than drilling out one bolt hole to a wider diameter) but are we 100% sure that the mounting point is at the exact same height relative to the ground?

In addition although I don't think any change in geometry would significantly affect ride height, I'm also wondering if there was anything in Tim's (Flying Eagle's) post above. It is certainly true that much of the extra track is created by the hubs themselves. The axle length doesn't change so I assumed the lower strut mount wouldn't be any wider either. But I know the black car in the above pictures has adjustable control arms. I 'thought' the grey car had 'stock' arms. Anyone know if VR4 and 3KGT control arms are the same length?

Unless something 'is' assembled incorrectly, I have a horrible feeling that rear strut/spring combo is too short for this setup. I hope I'm wrong but I'm now wondering why it was we went to coilovers on both my cars with this mod.
 
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cheekychimp

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Quoting CutlassJim:
Shaving 3mm off the wheel hub of a +38 wheel would bring the offset to +41. /ubbthreads/images/graemlins/grin.gif



f***! /ubbthreads/images/graemlins/banghead.gif It's late! Yeah sorry, my bad, but that was definitely what we did, shaved 3mm off the rears to bring them in slightly. It makes sense now that you mention it, I think we worked out with this mod the ideal offset at the rear was +42.
 
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CutlassJim

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Well it should be SUPER easy to measure the difference between the two. If it is different though I'm not seeing it being that drastic of a change to make the rear camber in that much.

If the lateral arms were different lengths the toe would be way off which it doesn't appear to be in the photos. The camber is strictly from the geometry of the rear suspension.

If he does in fact need a longer strut assembly you could look into 2G strut tops or a strut spacer. I'm not sure that would give you the 2" you need though.
 

BrandonEchols

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Anchorage, AK
Thanks for all the replies, now I'm going to have to think of all the parts I have here, I'll come back with an edit or a new post when I get that together.

Front setup is using a Brembo adaptor from HERE
with evo rotors and full 1G front hub assemblies.

Rear is using 3000GT trailing arms, and rear evo rotors with a spacer behind them (hat height on this rotor makes it necessary to prevent the rotor scrubbing the rear hub), so that bumps the track out a bit more still.

Evo bilsteins all around, stock springs, Tein camber plates at the front, stock top bits on the rear.
Wheels are new with this setup, and they are stock Evo8 Enkei parts, no machining done, I needed to clear these brakes, but before this everything was 4 lug, so the plan was to do it all at once (swap to 5-lug, do the brakes, wheels, ABS delete at the same time so I only tore into it once). Before this I WAS using the bilsteins for a short time, with no issues (other than needing an alignment).
 
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