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Big Brake Upgrade

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Old 10-13-2018, 10:14 PM
  #1  
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Location: USA
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Car: 1988 IROCZ
Engine: ZZ4
Transmission: T-56
Axle/Gears: MOSER 9", 4.11 gear
Big Brake Upgrade

Just put together my long awaited C4-HD 13", FSLI-4 front brakes and found they hit the 1988 IROCZ wheels.

Let me be clear, I did not buy the brakes from BBU. I simply decided to ask someone in the business for ideas.
Long story short, Scott took the time - over several days - to help me determine that the width of the FSLI-4 is too wide to fit my 1988 16" wheels without a wheel spacer. A spacer that would push the tire out past the fender which I did not want.

Instead of selling me something I didn't need, Scott told me what I needed to resolve the problem. He then suggested the narrower, Wilwood BNSLI-6 caliper to keep wheel offset in check. He did not try to sell those to me either. They fit perfectly by the way.

Amazing customer service and a great guy.
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Old 10-13-2018, 10:38 PM
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Re: Big Brake Upgrade

Great feedback!! Scott is a top shelf guy, fantastic to deal with and to just shoot the breeze with.
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Old 10-14-2018, 10:58 PM
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Car: 89RS vert
Engine: Erod
Transmission: 4L65e
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Re: Big Brake Upgrade

Not surprised to hear that.Also have nothing but positive things to say about BBU/Scott.Was a great help & bought some great products from him.
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Old 10-16-2018, 02:54 PM
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Location: La Puente, CA
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Car: 1992 Z28 Targa Top. Full air ride
Engine: 305 5.0 tpi v8
Transmission: A4
Axle/Gears: 3.73 gears posi
Re: Big Brake Upgrade

I also have nothing but good things to say about Scott and BBU. Got my 4 piston Brembos from him and I couldn't be happier. A+
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Old 10-16-2018, 05:56 PM
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Location: Indiana
Posts: 209
Car: 92 Z28
Engine: ls3
Transmission: t56
Axle/Gears: 4.11
Re: Big Brake Upgrade

Scott is a great guy to work with.
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Old 10-17-2018, 05:40 PM
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Car: 1988 IROCZ
Engine: ZZ4
Transmission: T-56
Axle/Gears: MOSER 9", 4.11 gear
Re: Big Brake Upgrade

The BNSLI-6 Scott recommended, installed.

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Old 10-17-2018, 05:52 PM
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Car: 1988 IROCZ
Engine: ZZ4
Transmission: T-56
Axle/Gears: MOSER 9", 4.11 gear
Re: Big Brake Upgrade

It's hard to get a picture that clearly shows it but, there's .15" clearance. Wilwood recommends a minimum of .080".



Last edited by rurnt88; 10-18-2018 at 09:06 PM. Reason: Added Information
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Old 10-18-2018, 03:29 PM
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Location: MICHIGAN
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Car: 1988 Trans Am
Engine: L03
Transmission: 700R4
Axle/Gears: 10 Bolt 2.73 Open
Re: Big Brake Upgrade

That's snug.
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Old 10-18-2018, 09:11 PM
  #9  
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Car: 1988 IROCZ
Engine: ZZ4
Transmission: T-56
Axle/Gears: MOSER 9", 4.11 gear
Re: Big Brake Upgrade

Originally Posted by DynoDave43 View Post
That's snug.
Yep. 0.15". Added information above.
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Old 10-19-2018, 07:11 AM
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Re: Big Brake Upgrade

Yikes. Is that adequate, with rim flex and all?
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Old 10-19-2018, 08:04 AM
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Join Date: Apr 2017
Location: USA
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Car: 1988 IROCZ
Engine: ZZ4
Transmission: T-56
Axle/Gears: MOSER 9", 4.11 gear
Re: Big Brake Upgrade

Originally Posted by DynoDave43 View Post
Yikes. Is that adequate, with rim flex and all?
Scott said this about the stock 1988-90, 16" wheels," Even with the 6 piston you will need a .050-.100 wheel spacer to have breathing room."

So, a .100" slip-on spacer will be used.
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Old 10-22-2018, 09:36 PM
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Transmission: 700R4
Axle/Gears: 10 Bolt 2.73 Open
Re: Big Brake Upgrade

Good to know. Thanks.
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Old 10-23-2018, 05:42 PM
  #13  
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Location: Wichita Kansas
Posts: 340
Car: 92 RS
Engine: LT1
Transmission: 700r4
Axle/Gears: 3.73
Re: Big Brake Upgrade

His customer service is great. That is why I purchased my CTSV brakes from him.
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