13" rotors and 4-piston calipers in stock 16" wheels
03-20-2006, 09:12 AM
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Car: 1984 Corvette
Engine: Turbo 350
Transmission: 4L80E with TCI T-Com
13" rotors and 4-piston calipers in stock 16" wheels
We found an option for big brakes on a 1987 IROC.
These brakes will clear the stock 16" IROC rims.
Wilwood Forged Superlite calipers.
(click pictures to enlarge)
BMW 750 / 850 rotors. ( 324mm X 30mm ) Almost identicalto C5 Corvette rotors ( 324mm X 32mm ).
The rotor has to be modified to clear the adapter bolts.
Stock IROC rotor on the BMW-rotor.
These brakes will clear the stock 16" IROC rims.
Wilwood Forged Superlite calipers.
(click pictures to enlarge)
BMW 750 / 850 rotors. ( 324mm X 30mm ) Almost identicalto C5 Corvette rotors ( 324mm X 32mm ).
The rotor has to be modified to clear the adapter bolts.
Stock IROC rotor on the BMW-rotor.
03-20-2006, 02:57 PM
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Car: 1989 Firebird
Engine: a monster
Transmission: T-56
holy crap... so wait... does this mean you're using a bmw bolt pattern now? And yes I know they're close to the same but not exactly.
03-20-2006, 03:17 PM
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Car: 1990 Camaro RS
Engine: Juiced 5.0 TBI - 300rwhp
Transmission: T5
Axle/Gears: 3.42 Eaton Posi, 10 Bolt
This isn't exactly news. Both Ed Miller, and Spohn sell a 13" kit, that uses the Wilwood FBS caliper, that fits stock IROC wheels. Ed also sells at 12.2" kit that clears GTA wheels.
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03-21-2006, 02:15 AM
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Car: 1984 Corvette
Engine: Turbo 350
Transmission: 4L80E with TCI T-Com
We tested with a stock IROC wheel too, but I don't have any picture. The BMW has a brake pad that is very large radially. With the Wilwood caliper the inner part of the rotor surface is not used.
The stock bolt pattern is 5x4.75" = 5x120.65mm. BMW uses 5x120mm. It is almost identical. The rotor works fine with the stock bolt pattern.
Milling at a radius is not a problem.
The stock bolt pattern is 5x4.75" = 5x120.65mm. BMW uses 5x120mm. It is almost identical. The rotor works fine with the stock bolt pattern.
Milling at a radius is not a problem.
03-21-2006, 06:57 AM
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Car: '88 Iroc, '91 RS, and a '70 RS
Engine: 5.7 TPI; 5.0 TBI; ZZ4/T56 on the ag
Transmission: A4, A4, slated to be a T56
Hey there Dean, I was wondering where you went.
The BWM rotor pattern is close enough to work, it's the stud spacing in the hub that needs to be dead on. This is close to what I want to do with GTO rotors. The added height of the rotor will eliminate any need for a spacer and a Wilwood caliper.
Nice work, thanks for the post. Oh yeah...is that a standard or 1LE hub?
Ed
The BWM rotor pattern is close enough to work, it's the stud spacing in the hub that needs to be dead on. This is close to what I want to do with GTO rotors. The added height of the rotor will eliminate any need for a spacer and a Wilwood caliper.
Nice work, thanks for the post. Oh yeah...is that a standard or 1LE hub?
Ed
03-21-2006, 09:15 AM
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Car: 1984 Corvette
Engine: Turbo 350
Transmission: 4L80E with TCI T-Com
Originally Posted by ebmiller88
Hey there Dean, I was wondering where you went.
The BWM rotor pattern is close enough to work, it's the stud spacing in the hub that needs to be dead on. This is close to what I want to do with GTO rotors. The added height of the rotor will eliminate any need for a spacer and a Wilwood caliper.
Nice work, thanks for the post. Oh yeah...is that a standard or 1LE hub?
Ed
The BWM rotor pattern is close enough to work, it's the stud spacing in the hub that needs to be dead on. This is close to what I want to do with GTO rotors. The added height of the rotor will eliminate any need for a spacer and a Wilwood caliper.
Nice work, thanks for the post. Oh yeah...is that a standard or 1LE hub?
Ed
I don't know the Camaro option list.
It is a 1987 IROC with drum brakes on the rear. The stock front rotors are 265mm in diameter.
The IROC is a friends car but I am doing the same on my 1984 Corvette.
My stock 290mm x 20mm and the BMW 324mm x 30mm.
Last edited by JoBy; 03-21-2006 at 09:20 AM.
03-21-2006, 09:30 PM
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Car: 91 Z/28, 89 RS Race Car
Engine: 305 stock / ZZ4 AFR 195 9.7:1
Transmission: T5 / t10 / Jerico
Axle/Gears: 10blt w 3.42, 9 in w /3.80 DL
What do the BMW Calibers look like?
You mentioned that the stock pads were tall.
Seems it would be good to use all the rotor surface area.
You mentioned that the stock pads were tall.
Seems it would be good to use all the rotor surface area.
03-22-2006, 02:29 AM
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Car: 1984 Corvette
Engine: Turbo 350
Transmission: 4L80E with TCI T-Com
Originally Posted by SDIF
What do the BMW Calibers look like?
You mentioned that the stock pads were tall.
Seems it would be good to use all the rotor surface area.
You mentioned that the stock pads were tall.
Seems it would be good to use all the rotor surface area.
Stock BMW:
03-23-2006, 10:48 PM
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Engine: sbc 350
JoBy, nice job, thanks for posting this stuff.
You might want to post this at the Crossfire forum.
Just curious, what piston diameters, for the 'vette?,
and how did you choose?
You might want to post this at the Crossfire forum.
Just curious, what piston diameters, for the 'vette?,
and how did you choose?
03-24-2006, 09:52 AM
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Car: 87 Trans Am, 2002 Ford Focus hatchb
Engine: 305
Transmission: Auto
Axle/Gears: 2.73
so i saw the z06 ones, they look bad. I am thinking of doing alot to my car but, thinking is one thing and doing is another. lol. I want to put the z06 kit on the front but im still learning and still broke..............
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