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Quick basic question regarding GS Brake upgrade

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Old Jul 15, 2005 | 10:18 PM
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Default Quick basic question regarding GS Brake upgrade

Hi all.

Well after a bit of coaxing and alot of advice from Bogus, I am going to start doing some of my own work on my ride. One of my projects is the GS brake upgrade (this is on a 95 coupe). My other project is doing the plugs and wires, but I am looking at that more as a right of passage

My question is what tools will I need to do this upgrade? I would assume flare wrenches will be needed, but looking through my Helms manual I am not seeing a list of tools needed.

While I have the helms manuals here I am open to any tips or tricks any of ya all may have on this project. Havent done any auto type work in 16 years so I am all

Thanks!
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Old Jul 16, 2005 | 09:45 AM
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Default Brake upgrade

Nothing special. Just a normal line wrench and a screw driver to remove the circlip on the guide rod. The project is a direct bolt-in.

All you have to do is remove the circlip from the guide rod and pull the rod out and the brake line from the caliper (use a line wrench for this you don't want to strip the line nut). Assemble in reverse order with the new calipers, bleed the brakes and you should be ready to go.

Test the brakes by pressing the peddel a few times before you actually drive the car.
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Old Jul 16, 2005 | 10:08 AM
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Good deal. Thanks for the info there.
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Old Jul 16, 2005 | 10:24 AM
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Originally Posted by mik
Nothing special. Just a normal line wrench and a screw driver to remove the circlip on the guide rod. The project is a direct bolt-in.

All you have to do is remove the circlip from the guide rod and pull the rod out and the brake line from the caliper (use a line wrench for this you don't want to strip the line nut). Assemble in reverse order with the new calipers, bleed the brakes and you should be ready to go.

Test the brakes by pressing the peddel a few times before you actually drive the car.


Do you have a good floor jack and some jack stands? Harbor frieght has them on sale (stands only) from time to time. I wouldn't trust a jack from them though. Spend the $$ for a good floor jack and then get used to it so it doesn't suprise you!!!

Good luck...

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Old Jul 16, 2005 | 10:33 AM
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I'm no GS expert but I recall seeing something in a thread yesterday that said a Motor Trend test quoted the GS stopping one foot shorter than a standard C4 in a 100 (120?)to 0 brake test.
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Old Jul 16, 2005 | 01:10 PM
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The GS caliper will do that stop 2 or 3 times, whereas the stock caliper more then likely won't. They are both prone to spreading, due to miserably poor heat releasing properties, but sure does look good!

Oh, 1995 was the first year for J55 standard, so all you should need is the calipers.
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Old Jul 16, 2005 | 05:01 PM
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Originally Posted by cuisinartvette
I'm no GS expert but I recall seeing something in a thread yesterday that said a Motor Trend test quoted the GS stopping one foot shorter than a standard C4 in a 100 (120?)to 0 brake test.
Yep, the difference between J55 and GS is basically cosmetic. Major waste of time and money to do that.
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Old Jul 16, 2005 | 05:02 PM
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In regards to the jack, I was all set to get one from Harbor but Bogus convinced me otherwise. I will get myself a nice one... though probably not as nice as the one Andy has. I hear you could jack a house up with it!

So Bogus, to do the upgrade I just need the Calipers huh? Its just a straight 13" to 13"? Heck thats great seeing how I was going to buy what I guess would be several uneeded parts.

Now to call Chris May at Superior and get this project rollin!


Steve, I am far from an expert on these things so perhaps yes this is only a cosmetic thing like you say. However, aside from the GS having a nice look this is going to be a great basic project for me to cut my chops on so to speak. For years been taking my cars to shops... would sorta like to learn to do this stuff myself and this along with the plug and wire changes seems like a good learning experience

Last edited by Larzus; Jul 16, 2005 at 05:12 PM. Reason: added comment
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Old Jul 16, 2005 | 08:10 PM
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I don't mean to hi jack this thread, but, on my 92, would the GS brake upgrade be just replacing the calipers and rotors (12 to 13")? How about the rear? Is it an upgrade too? Would I lose my emergency brake like the C5 upgrade?
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Old Jul 17, 2005 | 12:55 AM
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GS brakes (aka pbr calipers with stock 13 in rotors) aren't really much of a benefit for a street car. If you road race your car then better calipers, thicker rotors and a good air supply to the rotors will help brake fade.
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Old Jul 17, 2005 | 01:19 AM
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Originally Posted by Strick
I don't mean to hi jack this thread, but, on my 92, would the GS brake upgrade be just replacing the calipers and rotors (12 to 13")?
http://www.superchevyperformance.com...s/gsbrakes.asp

How about the rear? Is it an upgrade too?
No.
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Old Jul 17, 2005 | 01:25 AM
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Originally Posted by 2manyfuncars
GS brakes (aka pbr calipers with stock 13 in rotors)
All late C4 calipers are made by PBR. I think the early ones are also, but not sure. "PBR calipers with 13" rotors" does not define GS brakes because J55 is also PBR calipers and 13" rotors.
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Old Jul 17, 2005 | 05:18 AM
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All the brakes are made by PBR based on a Girling design... it's teh same company, if I remember rightly.
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