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Old 03-05-2002, 03:37 PM   #1
mca
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Default DMS Golds: Need help with GDA>GC8 adapter plate

Hi everyone,

I just received my DMS Golds and STi strut tops. I was reading through the install directions to mount the GDA>GC8 adapters and it says to position the mount so the 7mm hole is facing the inside of the car. The STi mounts i got from have the MRT part number MUSS128A and MUSS128B. I looked at the rears (MUSS128B) and they don't appear to have a hole like the ones in the DMS picture. How would I install these? Did I get the wrong strut tops? I looked at the MRT web page and the MUSS128B is listed as the 93-2001 (GC8) rear top mount, with a different number (MUSS129C) listed for the GDA rear mounts. Can someone please clarify for me?

Also, I didn't receive any extra washers for the rear strut camber correction. It appears that there are gold washers in the lower rear holes, but no extra washers anywhere.

If anyone can help me with this issue I would be very grateful.

I can't wait to install them this Saturday!!

Aaron
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Old 03-05-2002, 03:55 PM   #2
gtguy
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The gold washers already in the rears are supposed to give you about -.75 of rear camber.

The directions and the reference to the 7mm hole presumes that you have the "proper" STi strut tops that are WRX-specific. If you do a search for something like "DMS STi adapter," someone posted instructions on how to deal with them. Or just call Dave Clark at DMS-USA. Again, do a search and his phone number will come up.

Kevin
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Old 03-05-2002, 04:24 PM   #3
mca
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Thanks gtguy!

Will the Gold washers be sufficient for my WRX sedan? I'm not sure what the stock settings are, but I'd like to keep uneven tire wear to a minimum. I'm planning on setting it 1-2" lower than stock. I'll be running 17x7.5 Rota Tarmacs with 225/45/17 tires, haven't decided which ones yet.

The rear mounts i got are meant for the GC8. I thought this was the correct mount to use with the DMS adapter plate?

I did try to call Dave, but his voicemail box was full.

Aaron
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Old 03-05-2002, 10:05 PM   #4
gtguy
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The GC8 mounts are something that DMS is doing to quiet rear suspension noise that some folks were complaining about when using the traditional WRX rear tops with the angled DMS spring seat adapters.

As I recall from reading the thread about them, there are six threaded posts, not three, and you have to knock off the three that you don't need, or something like that. Weird.

If your wagon is anything like mine, you will in fact wind up with a very nice rear camber setting of around -1.5, which will be fine for tire wear. I don't know if I would go 2" down, but that's just me. All kinds of crazy stuff starts happening to the Subaru suspension geometry when you drop that low.

Kevin
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Old 03-06-2002, 01:18 AM   #5
robert99b
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i just put my DMS Gold with the STi tops in over the weekend. It came with the GC8-GDA adapter. gtguy's right, you gotta knock the bolts out of the rear Sti tops, then mount the GC8-GDA adapter to the strut top. in fact, exactly as illustrated in the instructions.

those camber washers were in the package as well. one coilover has the washers rubberband'ed to it, while the other was loose because the rubber band broke. good thing it didn't fall out of the box.

i initially had mine set to max positive camber in the back, only to find out my tires rubbed on the fender. tore it apart, and set it up for max negative camber. got ride of the rubbing, but was concerned that i was rubbing too much neg camber.

got my alignment today and found out the right rear was -1.7*, which was ok. but left rear was -2.4*. the guy loosen both bolts, pulled the wheel outwards and was able to get to -1.9*. i'm ok with this setting. no rubbing problem. should be no excess tire wear if i rotate the tires regularly.

i am getting rubbing in the front. maybe that's the reason peole keep their front end up a bit, to avoid rubbing the inner fender. i'll have to see exactly where mine is rubbing. perhaps thicker front anti-roll would prevent body lean, which may avoid the rubbing?

sorry. bad grammar...
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Old 03-06-2002, 01:58 AM   #6
scotto
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rober99b,

What size wheels and tires are you using to get that much rubbing? Or is it just how low you have your suspension set?
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Old 03-06-2002, 12:24 PM   #7
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18 x 7.5 with 45mm offset on 225/40-18 tires. i think it is more a factor of how much I lowered the car vs. the offset of the rims. i was reading some other posts, and some people with 51mm rims were getting rubbing on the inside fender as well.


here are pics of my car before and after lowering, http://www.i-club.com/forums/showthr...hreadid=131095



Quote:
Originally posted by scotto
rober99b,

What size wheels and tires are you using to get that much rubbing? Or is it just how low you have your suspension set?
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Old 03-06-2002, 08:17 PM   #8
scotto
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Rober99b,

Your wagon looks awesome! Did you have any rubbing prior to lowering? Great looking wheels, but I bet the 45mm offset pushed them out a bit far. Like you said though you could have problems on the inside to with a higher offset.
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Old 03-07-2002, 12:57 AM   #9
robert99b
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Quote:
Originally posted by scotto
Rober99b,

Your wagon looks awesome! Did you have any rubbing prior to lowering? Great looking wheels, but I bet the 45mm offset pushed them out a bit far. Like you said though you could have problems on the inside to with a higher offset.
thanks! no rubbing whatsoever prior to lowering. now, the front is flush with the fender, the rear still tucks in a couple of centimeters (but we have that thick fender lip). even with the 45mm offset, the rims look pretty close to the rear coilovers. with 45mm it'd probably be perfect. for those running 50+ offset, it must be EXTREMELY close to the coilovers.
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Old 03-07-2002, 09:18 AM   #10
bill harvey
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Default to fix the sti top mounts

what you have to do is punch the studs out of the gc8 rear sti top mounts and then the dapter bolts to it. the studs should come out fairly easy just need to have a vise.
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Old 03-07-2002, 10:16 AM   #11
robert99b
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Default Re: to fix the sti top mounts

Quote:
Originally posted by bill harvey
what you have to do is punch the studs out of the gc8 rear sti top mounts and then the dapter bolts to it. the studs should come out fairly easy just need to have a vise.
Actually I just had mine on the ground and pounded it a few times with the hammer. It came out just fine.
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Old 03-07-2002, 12:23 PM   #12
mca
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Thanks for the advice guys. I just realized that I was looking at the instruction for the angled spring seat adapters, which mentions the WRX rear mount. I'll be having a friend of mine remove the studs on a press tomorrow, just in time for my install on Saturday.

How should I set ride height for the initial install?

Thanks,
Aaron
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Old 03-07-2002, 01:30 PM   #13
Zahnster
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If you have STi tops(unless they are GC8 STi tops) shouldn't you NOT be using the adapters?
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Old 03-07-2002, 03:56 PM   #14
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Start at 1" down, and see how you like it. Crap, I forget how high that is on the DMS collars. I'll have to see if I still kept my templates for ride height. If you can wait until after the weekend, I'll measure mine when they come off the car and give you exact collar height data.

Barring that, the DMS recommendations will get you in the neighborhood. Before you pull the stockers off the car, measure the ride height from wheel center to fender lip, so that you have those numbers, and will then know how much variance you need from the DMS. Sure it seems obvious, but guess who didn't do it his first time installing them? You only get one guess!

Kevin
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Old 03-09-2002, 01:56 AM   #15
robert99b
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I think my current collar height measurement is 35mm (from bottom) in the front, 45mm in the back. That gives me about 1.7" drop in front, 1.2" in back. These are rough numbers. I did not measure final drop height after making some minor adjustments.

When I did the DMS recommended 55mm (from bottom) in front, it looked like stock height. I immediately winded it down.
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Old 06-12-2002, 07:07 PM   #16
Shoelace
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One more question.

I just got mine with the GC8 adapter and mounts, but have a concern regarding the spacing between the upper spring perch and the strut mount itself.

Can someone verify if there is a gap between the spring perch and the gc8 strut mount (no more than 1 cm), or is it supposed to sit flat. If flat, what combination of the spacers did you use. I've tried just about everything.
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