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Does anyone recognize these rotors? They are installed on a '86 944 Turbo race car that has had a big red upgrade done. The folks that built the car had given the prior owner a new pair of OEM 993TT rotors to use as spares/replacements, but there is a 10mm difference in the "offset" compared to these slotted rotors currently on the car and that is causing a fitment issue. No one seems to know what rotors I really need to use as replacements. Any thoughts??? I see no markings on these slotted rotors that would indicate who made them. Tried to search but couldn't find anything. Hard to imagine I'm the only one that has come across this problem with how common the Big Red upgrade is. Any insight is greatly appreciated. Thanks!
Those are very unique brake hats that you have on your rotors. If you are running Big Reds on your '86 951, are you running with '87-88 hubs? If so, I would use the stock two-part 993 TT rotors and replace the stock brake hats with the Lindsey Racing 951 adapter brake hats. The LR brake hats will let you use the 993 TT rotors on a '87-88 951 with the correct hat offsets.
The above is a picture of the big red install on my 951. I used the Lindsey hats with 993 TT rotors. The Lindsey hats are a work of art and are each 1.5 lbs lighter than the factory TT hats. The color of your hats leads me to think your setup is kolken. Their products were that color scheme.
I don’t see backing plates or wear sensors on your setup. I installed both on mine. I modified 993 GT3 backing plates and had a machinist creative a program for his mill to cut the slots in the pads to accept the wear sensors. I use Pagid blue pads and they do not come ready for wear sensors.
Another thing that is odd about your big red caliper 951 installation is that from your picture it appears they are mounted on the leading edge of the rotor, which is not the normal brake caliper mounting position for a 951. The normal position is how Bill's big red caliper is mounted (see pictures above) on the trailing edge.
Those are very unique brake hats that you have on your rotors. If you are running Big Reds on your '86 951, are you running with '87-88 hubs? If so, I would use the stock two-part 993 TT rotors and replace the stock brake hats with the Lindsey Racing 951 adapter brake hats. The LR brake hats will let you use the 993 TT rotors on a '87-88 951 with the correct hat offsets.
Honestly I can't say for sure if the hubs are '86 or '87-88. I'll have to check on that.
Originally Posted by Bill
The above is a picture of the big red install on my 951. I used the Lindsey hats with 993 TT rotors. The Lindsey hats are a work of art and are each 1.5 lbs lighter than the factory TT hats. The color of your hats leads me to think your setup is kolken. Their products were that color scheme.
I tried to search for pics/info on Kolken and couldn't find anything. I'm not familiar with them at all. Are they still around or am I just missing something here?
So looking at the Lindsey Racing website I see that there are two options for rotor hats. One for a 1986 944T, and another for 87+ 944T's. I'm assuming the hubs are different based on the earlier comment. Sounds like my best option is to figure out what hubs are installed on this car and try the appropriate hat to see if that fixes our offset problem. The only info I have is a list provided by the prior owner but it's pretty vague. The list states that the car has...
· 993 TT front and rear Big Red brakes
· Fairly new 944 Turbo S axles and CV joints
· Fairly new front and rear wheel bearings
...no mention of if the hubs were ever changed with 87+ hubs. Guess we'll have to hunt for a part # and see if we can figure that out.
Here's the entire build list in case I missed something pertinent.
Chassis / Body
Complete car built by Broadfoot Racing
Modified OG Racing Cage. Door Bars, Knee Bar, Front hoop Bar, and window net.
Fab Car front control arms
4 way adjustable remote reservoir LEDA coil-over shocks with 700 and 800 pound springs
M030 front and rear sway bars
Adjustable camber plates
Hard spherical bearings / bushings throughout
On-board fire system
Completely gutted interior
Lexan rear hatch
72" carbon fiber wing
Broadfoot GT2 style body kit
Fiberglass rear bumper
993 TT front and rear Big Red brakes
10 and 11" x 18" front and rear wheels
285/30 ZR18 front Hoosier tires (Rains (1 Session) and R7s (1 Weekend))
315/30 ZR18 rear Hoosier tires (Rains (1 Session) and R7s (1 Weekend))
Fairly new 944 Turbo S axles and CV joints
Fairly new front and rear wheel bearings
Fairly new front windshield
Broadfoot Dash with AutoMeter Gauges
Custom lightweight chassis and engine harness
Quick release Sparco steering wheel
Engine
2.6 liter, sleeved, 400HP engine
Cross drilled, knife edged, micro polished, nitride crank
Carrillo Rods
Coated JE Racing pistons
Race cam
Race springs
O-ringed ported head
Polished boost pipes
Turbonetics T3/T04E/K26 #10 Turbocharger
TiAL F46 wastegate
TiAL blow-off valve
3" stainless cat bypass pipe
3" stainless cat-back exhaust (w/ and wo/muffler)
Electromotive TEC3r stand-alone fully programmable EMS
Massive intercooler
Massive oil cooler
It is the spindles that will determine what hardware you need to mount the big reds. I converted my 86 spindles (radial Mount) to the 88 Turbo S spindles (axial mount). The big reds bolt directly to the Turbo S spindles. To mount big reds on 86 spindles, you will need all the Lindsey adapting hardware. The hats need to be changed to space the brake disks so they are centered in the brake calipers. You can use any hub, but the Turbo S hub is supposed to be stronger, but both are known to fail. Racers Edge makes a billet hub that is supposed to be bullit proof.
Update: Verified the car has 87+ hubs. According to Lindsey Racing I should just need the 87+ caliper adapters and rotor hats. Parts are ordered, fingers crossed!
04-19-2018, 01:35 PM
944 Turbo Big Red's - Rotor Issue
