fieroguru 13" Brake Upgrade for 88 Fieros - available Jan 15th, 2012 (Page 1/26)
fieroguru DEC 27, 07:41 PM




My goal in developing this kit was a clean sheet approach to find the best fitting rotor for the 88’s that will maximize braking force by increasing the diameter of the rotor while keeping the rest of the brake system stock to ensure proper brake bias and parking brake function. You can read more about the development of this kit in late 2011 here:
http://www.fiero.nl/forum/Forum1/HTML/087368.html

The rotors used in this kit are from the GM Lambda platform (4 rear rotors):
2007-2010 Saturn Outlook
2007-2016 GMC Acadia
2008-2016 Buick Enclave
2009-2016 Chevy Traverse

Some of the key benefits of this kit are:
• Use of stock calipers and parking brake cables keeps cost to a minimum.
• Stock brake bias and parking brake function retained.
• 25% increase in brake rotor diameter for improved visual impact behind 17+” wheels vs. 15% with the 12" C4 setup.
• 33% increase in brake system mechanical advantage due to caliper being further from wheel center vs. 21% with the 12" C4 setup.
• 19% increase in rotor/pad surface area to reduce potential for brake fade vs. 12% with the 12" C4 setup.
• Available in Drilled/Slotted w/Zinc coating to minimize additional weight and improve appearance.
• No interference issues between the rotor/caliper and the front suspension a-arms when used with stock ball joints. NOTE: I do not recommend this kit if you have Rodney's lowering balljoints installed - they cause lower A-arm to rotor interference issues
• Lowest price of any 13” brake kit on the market today.

The downsides of this kit are:
• Weight – this kit will add about 6.5 lbs per wheel over the stock 88 rotor.
• Wheel requirement – this kit requires 17+ wheels
• Cost - this kit is slightly more expensive than the C4 12” rotor upgrade that has been the brake upgrade standard on the 88’s for many years.

The Kit consists of the following parts (shipped in 2 boxes):
• 4 - 13” rotors drilled to the 5x100mm pattern
• 4 – steel caliper brackets to relocate the stock brake calipers, painted semi-gloss black
• 4 – plastic expandable concentric rings
• 8 - grade 10.9 M12 bolts
• 1 – strip of sand paper
• 1 – aluminum brake cable sleeve extension
• 1 – steel brake cable end coupler, painted semi-gloss black

Pricing Summary: All prices shipped for US and Canadian addresses unless noted.

Hardware Kit Only – full car:...................$450
Full Kit with Drilled/Slotted/Zinc Rotors:....$775 (+$200 to Canada)

*** NOTE: My rotor supplier changes patterns rather frequently, so I can’t guarantee the exact drilled/slotted pattern you will receive unless I have rotors in stock. I will guarantee that all 4 rotors in your kit will be a matched set.


You can drill the rotors for the 5x100 pattern with a 1/2" drill bit and an old wheel bearing with the instructions in this thread:
https://web.archive.org/web...um2/HTML/120346.html

Inventory:
I purchase my brackets/ring is quantities of 100 and order the next batch when I get down to 5 full car sets, so I will always have the Hardware and Hardware kits ready to ship.
Rotors will not normally be stocked and ordered as payment is received for the brake kit. It normally takes 2-4 days for the rotors to arrive and 1 day turn around for the drilling and packaging.

Payment:
Payment in full is due at time of order. Your rotors will be ordered the same day and your kit should ship about 5-7 business days from time of order. Payment can be via paypal, postal money order, check (shipment delayed for clearance), or cash. If interested in ordering, please PM me for details.


Here are a few pics to show the drastic change in visual impact of this rotor kit.
Stock size rotor setup:


Caliper bracket and concentric ring installed:


New 13" rotor installed:

[This message has been edited by fieroguru (edited 11-22-2023).]

lateFormula DEC 27, 10:45 PM
Very Nice! I tip my hat to you Guru for creating and offering this. Looks to be an excellent package!
gtxbullet DEC 27, 11:06 PM
what size wheel will be needed to showcase this awesome kit?
mattwa DEC 27, 11:31 PM

quote
Originally posted by gtxbullet:

what size wheel will be needed to showcase this awesome kit?




quote
Originally posted by fieroguru:

The downsides of this kit are:
• Wheel requirement – this kit requires 17+ wheels
fieroguru DEC 28, 08:10 AM

quote
Originally posted by gtxbullet:

what size wheel will be needed to showcase this awesome kit?



Mattwa is correct - 17 inch wheels or larger are needed for this kit.

For those interested in the hardware kit, but concerned about having the drill the rotors, I will have a writeup this evening on how this can be done at home with a junk wheel bearing and a 1/2" drill bit.

[This message has been edited by fieroguru (edited 12-28-2011).]

motoracer838 DEC 28, 02:03 PM
guru, you have a pm.

Joe
hyphynator1984 DEC 28, 05:27 PM
will this kit fit a 84 fiero??
fierofan25 DEC 28, 05:41 PM
Another great product!!!
I currently have the 12 in installed on my 88 and the diffrence is night and day.I can only image waht this kit would do.
How much for just the brackets/ hardware. Thanks
fieroguru DEC 28, 06:47 PM
How to drill rotors for the 5x100mm at home:

The concentric rings will precisely located the rotor, so the pattern you need to drill in the rotors only has to allow the wheel studs to pass through. It doesn't have to be super precise and using a simple drill guide will allow you do accomplish this task with common tools.

Take a junk rear wheel bearing:


Clamp it in a vice by the bearing housing, use a 13/16" deep well socket against the internal splines and hammer until it comes apart:


Take the wheel flange and an 18mm socket and clamp it in the vice as shown to press out all 5 wheel studs:


Use a wire brush to clean up the wheel flange and hub:


Slide one of the concentric rings from your brake kit onto the wheel flange:


Find a large bolt and washer to allow clamping the wheel flange to the rotor. At the bottom you can use a flat bar vs. the large thick washer I have shown.


Align the open U to the recessed hole in the rotor and tighten the bolt to hold it in place (you do not want it to move while drilling):


Find a 1/2" drill bit - a pilot point one will allow drilling the hole in a single pass (the one shown is a Dewalt Cobalt with 3/8" shank and pilot point and is available at Lowes).


Use a drill press or in a pinch a hand drill will work. Drill down through the wheel flange (the splined wheel stud holes are just slightly smaller than 1/2" so you will remove some material from the wheel flange) and through the rotor. Repeat for all holes and repeat for all rotors.


Something to keep in mind is whatever you bolt across the bottom to hold the wheel flange in place will probably be drilled as well. The setup I use has pressed in tight fitting washers for the bolt, a tapered head on the bolt to precisely center the large washer (brake lathe part) and I turned down the large washer so that it just clears the edge of the bolt holes:




That's all it takes.
fieroguru DEC 28, 06:49 PM

quote
Originally posted by hyphynator1984:
will this kit fit a 84 fiero??



Sorry... it only fits 88's. I am also working on an 84-87 solid rotor upgrade (12 3/4") here, but it isn't nearly as far along:
http://www.fiero.nl/forum/Forum1/HTML/087538.html


quote
Originally posted by fierofan25:
How much for just the brackets/ hardware



$350 shipped.