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Performance Modifications for the NG900 / Old 9-3 This forum contains PERFORMANCE related Q&A's for the NG900 and 9-3. This may also include suspension.

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Old 08-09-2007, 08:32 PM   #1
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Viggen/Aero Front Brakes

Found a set of 2001 Aero calipers from a wrecker for $120 shipped. Thom helped to get them to Canada. Then came the $60 Zimmermans from eEuroparts. Here's the result:



And of course the usual tutorial for your viewing pleasure ;]
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Old 08-09-2007, 08:38 PM   #2
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everything bolted up no problem? hows the braking any noticeable difference?
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Old 08-09-2007, 08:39 PM   #3
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i have the same setup on my car now.
i love it. it is not a drastic change for the around town drive, but when you get coming down from 80+ to a dead stop as fast as possible, it is quite the fun time.
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Old 08-09-2007, 08:42 PM   #4
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Surprisingly, the Aero rotors fit onto my 1995 hubs just like that. Didn't drive the car much yet, but it sure can lock the wheels sooner than it did before. And I agree that stopping from the highway speeds is quicker now.
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Old 08-09-2007, 09:40 PM   #5
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but when you get coming down from 80+ to a dead stop as fast as possible, it is quite the fun time.

you damn right it is especially when its coming down from 100+ and nobody else in the car knew you were just testing the brakes.
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Old 08-10-2007, 03:21 AM   #6
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Surprisingly, the Aero rotors fit onto my 1995 hubs just like that. Didn't drive the car much yet, but it sure can lock the wheels sooner than it did before. And I agree that stopping from the highway speeds is quicker now.

Ohhh thats good news! I have aero front and rear brakes in my garage, but no rotors yet. Ragtopcav on saabcentral had to do some machine work on his front hubs to get the rotor to fit!

Maybe his (since it is european) had a very very early hub?

Dip, did your car have the updated suspension components? Mine does not (well they are not on the car yet at least!!)

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Old 08-10-2007, 03:54 AM   #7
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I remember Nick had to machine the hubs too on his project car. Just take a rotor off on your car and measure the hub diameter. Mine were 5.25". Who knows, maybe the previous owner swapped the front struts from a newer car at some point. And yes, it came with old-style suspension too - I replaced all that last year.
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Old 08-10-2007, 03:55 AM   #8
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Quote:
Originally Posted by dip View Post
Surprisingly, the Aero rotors fit onto my 1995 hubs just like that. Didn't drive the car much yet, but it sure can lock the wheels sooner than it did before. And I agree that stopping from the highway speeds is quicker now.
Hm, this could be handy to know!

Dmitry, did you happen to take note of the casting number on the bottom of the caliper? Like 478?

Also, do you see any advantage in upgrading the master cyl / booster to viggen specs?
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can be prone to failure due to increased localized stresses in the hole penetrations

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Old 08-10-2007, 04:00 AM   #9
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Where are those numbers located? I didn't pay much attention. There was a whole bunch of numbers on different sides of the caliper. Maybe you'll spot it if you browse through the gallery. There definitely is something-78 on the bottom of the bracket on this picture.
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Old 08-10-2007, 04:22 AM   #10
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Yep, that's it! Same casting number on the Viggen! I've been trying to get info on the 2 different carriers for months now.

I'm going to order some rotors today and maybe do the swap tomorow if I can get a good look at my hubs. I got a fealing I wont be as lucky as you.
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can be prone to failure due to increased localized stresses in the hole penetrations
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Old 08-10-2007, 05:18 AM   #11
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Yep, that's it! Same casting number on the Viggen! I've been trying to get info on the 2 different carriers for months now.

I'm going to order some rotors today and maybe do the swap tomorow if I can get a good look at my hubs. I got a fealing I wont be as lucky as you.
Let us know how it goes. Would a 1997 be any different?
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Old 08-10-2007, 06:36 AM   #12
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1997 should be 100% straightforward.
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Old 08-10-2007, 09:11 AM   #13
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Well now that I am inspired I had a set of non slotted but internally vented rotors dropped off from Olympic. 308mm outer diameter, and Looks like 5.5 inches inside the mounting face. I may when the car is up, put it into gear and file down a the hub a bit.
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- pretend you are watering delicate plants...
Quote:
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can be prone to failure due to increased localized stresses in the hole penetrations
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Old 08-11-2007, 12:36 PM   #14
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Update, most 94s-96s, will need to have smaller hubs. I tried today and it was a no-go.

For those trying this, all that needs to be done is the old caliper, and rotor has be to be removed. Leave all the plumbing in tact. Do a test fit of everything. If it fits, go ahead and plumb the lines up.
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- pretend you are watering delicate plants...
Quote:
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can be prone to failure due to increased localized stresses in the hole penetrations
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Old 08-15-2007, 06:16 AM   #15
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It's about time for brakes on my 99 9-3SE so I have a couple questions...

Do these fit with 16" 9-5 wheels?
Also, is there any difference in the Viggen/Aero calipers?

So all I need is the Viggen/Aero calipers, rotors & pads correct?

Many thanks!

-Josh
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Old 08-15-2007, 06:19 AM   #16
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In short:
- yes, 16" 9-5 wheels do fit;
- no, there's no difference between Viggen and 2000-2001 Aero calipers;
- correct (actually, you can reuse your old pads too)
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Old 08-16-2007, 02:44 PM   #17
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Question

dip: Many thanks for the prompt reply! Your site is excellent btw… It's really commendable that you take the time to thoroughly document everything and make it available on the web!

I have another question... Has anyone tried the rear 300mm upgrade on a NG/OG? I'm really curious to know if it is as straight forward as the front?

Thanks again,

-Josh
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Old 08-16-2007, 02:51 PM   #18
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Will these rust like my calipers and rotors?
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Old 08-16-2007, 09:02 PM   #19
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Oh, yes, they will rust. They all do, unless you paint them. Did you really expect cast iron to remain rust-free forever? ;]

I wirebrushed my calipers prior to installation to clean them from brake dust and dirt, and they might remain in a more or less presentable shape for a couple of months afterwards. I'm not counting on that to last through the autumn though.

Last edited by dip; 08-16-2007 at 09:04 PM.
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Old 08-17-2007, 08:33 AM   #20
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I painted mine with bbq paint. The centrex or whoever rotors have a dark grey look to them. So it turned out well.
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- pretend you are watering delicate plants...
Quote:
Originally Posted by SAABseanSCANIA
can be prone to failure due to increased localized stresses in the hole penetrations
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