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As you may recall, some of us track and "deceleration" enthusiasts banded together in search of better, resonably priced brakes for our cars. There are already lots of kits available for our cars, but most are expensive. We wanted something that was economical, yet was a big improvement over stock brakes. Our original goal was to fund research and development of a 2 piece rotor for Brad Bedell's Porsche "Big Red" upgrade kit. With a 2 piece rotor, Brad's kit would be very similar to Mov'it's $2800 kit but we were hoping that Brad's kit with a 2 piece rotor would be about $2100. A lot of investigation was done and here is a summary.
(Note: We ended up not spending any money on R&D since our investigation uncovered existing economical solutions. It turns out that there would be little if any cost savings if Brad were to fabricate his own hats for 2 piece rotors versus just buying them from a reputable and experienced manufacturer.)
Brad's "Big Red" kit
It currently sells without rotors but includes Porsche 993 calipers,
caliper mounting brackets, Goodridge stainless steel brake lines
for 4 wheels, a set of pads, and fluid. This is the entrypoint
to serious brake upgrades and folks have reported dramatic
results. With a set of $250 Porterfield rotors you can seriously
upgrade stock performance for about $1700.
- : -
KVR "Lobster" kit (his name for the "Big Reds"), with 2-piece
Porsche rotors. Terry Gosse of KVR has been doing custom brake
kits for many years and has a lot of knowledge and experience. Basically, he
can do anything for any budget. This price was approximate, and includes
Porsche 993 calipers, mounting brackets, 2 piece rotors using Porsche GT2
322x32mm disks and custom 6061 T6 aluminum hats, stainless steel lines for the
front, AP racing fluid. I don't know if this price would include SS lines for
the rear, or include pads. However, this is basically the same thing as the
Mov'it kit for a lot less money. Porsche makes awesome disks. They are
directionally veined, the holes are cast and then drilled to final diameter. If
desired, he could substitute other, larger disks for about the same price. KVR
also has directionally veined disks that you can get solid, crossdrilled, or
slotted. The Porsche and KVR disks have "reasonable" replacement
costs, less than $200 each. The hats should last 5 racing seasons
or a lifetime on the street.
- : -
KVR "Big Black" kit with Porsche 928 S4 calipers
with 2 piece rotors. This kit is the same as the above Lobster kit
except for the calipers. Terry Gosse of KVR says these calipers
will be a better match for our cars, since the 928 is a similar heavy weight,
front engine car like ours (TT/VR4). The Big Red calipers are for lighter,
rear engine cars. The Big Black calipers have 2x38x44mm pistons while
the Big Red has 2x36x44mm pistons. This extra 2mm makes a big
difference over 4 total pistons. Also the Big Black calipers are bolted
together closer to the centerline and will deflect less than the Big Reds.
And the Blacks' shorter 50mm pads will deflect less than the Reds'
60mm pads. The Big Blacks can accomodate 332mm rotors while the
Big Reds max size is 322mm. Finally, there are more pad choices
for the Big Blacks versus the Big Reds. This is IMHO the best deal
of the survey.
- : -
Stillen Brembo kit This was the price a few years ago.
Some folks have this and are very happy, but others have reported that
their crossdrilled disks crack and warp. The replacement disks are also
costly. Supposedly, the Porsche treatment of Brembo calipers in the above
kits is better than the stock Brembo caliper in this kit. The calipers do
compare to the 928 though, since the pistons are also 2x38x44mm.
- : -
$2100 - $2800
Mov'it Big Red kit The Ultimate Garage's web
site say they utilize the Porsche 996 monobloc calipers (instead of the 993) and
the GT2 2 piece rotors. These 996 calipers would make it better than the above
Lobster kit. Supposedly, our European friends can get these directly from
Mov'it for about $2100 although Ultimate Garage's price is $2800. I think Roger
Gerl was investigating becoming a Swiss distributor.
- : -
$2500 - $3000
KVR AP Racing 6 piston caliper and 2 piece rotors.
Terry said he could sell this kit for $2500 for a group purchase of 5 or more.
$3000 is the normal price. I'm not sure if this is the identical kit to
the one on Stillen's webpage. This is the entry to the "very serious"
upgrades and is really a step above the previous kits. It can
accomodate 355x35.5mm rotors!
- : -
$3000+ There are other kits available but not investigated,
because of their prices. Mov'it's "Terminator" kits
(14.9" disks!!), Baer, and Wilwood, come to mind. Probably
the awesome looking NewTech fits this category too.
$1800 - $2600 Mov'it has a kit for the rear brakes too. It uses
Boxter S components including a 299x24mm rotor. It should
cost about $1800 in Europe but $2600 in the states.
All of these kits, including the Mov'it kits, should fit '91+ 3000GTs and Stealths,
as long as you have the wheel clearence. To improve clearance and increase
front track width (which reduces understeer), you could utilize a thicker
facing on the hat, with longer wheel studs. Since Mov'it is now using 996
calipers, it would be worthwhile to compare them with the 928 S4 caliper.
Regardless, Terry Gosse of KVR should be able to build custom front kits with
any caliper and any disk and still have unbeatable prices.
--- Ken Middaugh
(Note: Some comments were made after Ken posted this article to the Team3S list. Here are a few additional thoughts; "RM" is Rich Merritt and "KM" is Ken.)
1. It's tough to beat Brad's Big Red kit.
2. The Porterfield cryogenically treated rotors seem to be the best buy for
For 1 piece steel rotors, I agree. However, #1 and #2 will cost
$1700. For a few hundred more (~$1900 or so) you can get the KVR Lobster kit
that has the same calipers and a 2 piece rotor using the Porsche GT2 disk.
3. The next upward step MIGHT be to buy a two-piece Porsche rotor.
A 2 piece rotor would definitely be the next upgrade. Here are some of the
advantages of 2 piece rotors:
Does anyone know if the Porsche rotor will fit the Brad's conversion, or do we
need a new mounting bracket?
Most likely, unless your current rotor is 322mm in diameter. Folks ordering 2
piece rotors should also order caliper mounting brackets. Unfortunately, this
becomes an expensive upgrade in the two-step approach, likely around $850.
Recommended Brake Products
(Note: Team3S member Geoff Mohler's "SpeedToys" is the recommended "Good Guys" vendor for brake pads, rotors, high-temp Motul brake fluid, and a number of other other related products for Stealth and 3000GT. Geoff hosts the Team3S websites as well as both our Team3S list and our Team3S Racers list. Below are the current discounted prices for the brake products that most of us use. Any profit that Geoff realizes helps to support THIS website as the *only* totally free, and ad-free 3S website. We encourage all members to help support Team3S by purchasing replacement brake parts from Geoff.)
|Porterfield Brake Products by SPEEDTOYS
To order contact: firstname.lastname@example.org
|Product||Part number||Price ($US)|
|Stealth & 3000GT (NON-turbo, all years)|
|Front Rotors||JBR 583||$79.95|
|Rear Rotors||JBR 584||$80.00|
|Front Pads||R4S AP 530||$83.00|
|Rear Pads||R4S AP 383||$63.00|
|Stealth RT/TT & 3000GT VR-4 (1st Gen, 4/90 to 5/93 production)|
|Front Rotors||JBR 582||$82.00|
|Rear Rotors||JBR 585||$90.00|
|Front Pads||R4S AP 531||$69.00|
|Rear Pads||R4S AP 532||$56.00|
|Stealth RT/TT & 3000GT VR-4 (2nd Gen, 6/93+ production)|
|Front Rotors||JBR 785||$104.50|
|Rear Rotors||JBR 786||$99.00|
|Front Pads||R4S AP 531||$69.00|
|Front Pads||R4 AP 531 or R4E AP 531||$116.00|
|Rear Pads||R4S AP 631||$76.00|
|Rear Pads||R4 AP 631 or R4E AP 631||$95.00|
|Porsche Big Red Calipers|
|Front Pads||R4S AP 594||$128.00|
|Front Pads||R4 AP 594 or R4E AP 594||$137.00|
Add $45 per rotor for *each* process: Slotting - Drilling - Cryo-Treating
All pads are a Carbon Kevlar blend made by AP Racing.
Versatile and a superior performer. Some dusting.
Slight squeal at cooler street temperatures.
R4-S: Street High-performance & Limited Competition
The high performance street pad of choice. No dust or squeal.
Very high friction level even at cold temperatures.
R4-E: Endurance Racing Pads with Longer Life
This is an endurance pad, especially formulated for long races.
It runs cool and wears longer than the R-4. Great for extended time events.
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