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Re: Biggest rotor you can fit on a stock 73 A disc knuckle ?
[Re: Kern Dog]
#2256511
02/20/17 11:55 AM
02/20/17 11:55 AM
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Joined: Nov 2016
Posts: 200
Colorado
Bob J
enthusiast
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enthusiast
Joined: Nov 2016
Posts: 200
Colorado
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15" front talk with Magnum Force but that is a 6 piston. You can go to 12.19 with 4 piston with the Wilwood kits. I'm not sure on other kits.
07 Porsche C2 997.1 6spd DD and SCCA Solo II SS
68 Plymouth GTX Convert. 493cu Hotkiss Wilwood Classic air, Building for Solo II Cam
65 Chrysler 300 Convert. project
57 Desoto 2dr. Firesweep 392 Hemi,Wilwood Project with son
2003 Dodge Dakota R/T "DEAD"
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Re: Biggest rotor you can fit on a stock 73 A disc knuckle ?
[Re: Kern Dog]
#2258859
02/24/17 06:32 PM
02/24/17 06:32 PM
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Joined: Feb 2011
Posts: 4,302
Nebraska
72Swinger
master
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master
Joined: Feb 2011
Posts: 4,302
Nebraska
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The wheel shell and spoke design also play a roll on caliper/rotor offset. If the rotor has enough inset you can fit more common off the shelf wheels.
Mopar to the bone!!!
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Re: Biggest rotor you can fit on a stock 73 A disc knuckle ?
[Re: Kern Dog]
#2259776
02/26/17 01:41 PM
02/26/17 01:41 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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I was just wondering and mulling the options. what about some aggressive nascar pads & a breakin (bed in) procedure. it'd be the easiest upgrade.
live every 24 hour block of time like it's your last day on earth
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Re: Biggest rotor you can fit on a stock 73 A disc knuckle ?
[Re: Kern Dog]
#2259830
02/26/17 02:44 PM
02/26/17 02:44 PM
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Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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Nascar pads?
Nascar pads, if truly for Nascar applications and not just a gimmick name, are designed for serious high speed and high heat applications, probably gonna be horrible on a street car. Ever see the video of the rotors glowing cherry red when they put on the brakes during a race?
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
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Re: Biggest rotor you can fit on a stock 73 A disc knuckle ?
[Re: Kern Dog]
#2259833
02/26/17 02:49 PM
02/26/17 02:49 PM
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Joined: Nov 2016
Posts: 200
Colorado
Bob J
enthusiast
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enthusiast
Joined: Nov 2016
Posts: 200
Colorado
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Race pads on street = Front end body work
07 Porsche C2 997.1 6spd DD and SCCA Solo II SS
68 Plymouth GTX Convert. 493cu Hotkiss Wilwood Classic air, Building for Solo II Cam
65 Chrysler 300 Convert. project
57 Desoto 2dr. Firesweep 392 Hemi,Wilwood Project with son
2003 Dodge Dakota R/T "DEAD"
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Re: Biggest rotor you can fit on a stock 73 A disc knuckle ?
[Re: Kern Dog]
#2260690
02/27/17 09:09 PM
02/27/17 09:09 PM
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Joined: Jan 2003
Posts: 30,989
Oregon
AndyF
I Win
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I Win
Joined: Jan 2003
Posts: 30,989
Oregon
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Thanks. I have an 18x9 front wheel. I thought the common belief was that the rotor usually has to be 3" smaller than the wheel diameter.
No, I do not need a 15" rotor to stop the car, I was just wondering and mulling the options. It depends on the shape of the parts but back when I was building 13" brake kits they were all designed to work with Ford Mustang 17 inch rims. So if your 18" rims are caliper "friendly" then you should be able to put a 14" rotor in there. A 13" rotor with a big caliper should easily fit inside an 18" rim unless you have the world's worst wheel design.
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Re: Biggest rotor you can fit on a stock 73 A disc knuckle ?
[Re: Bob J]
#2260778
02/27/17 11:27 PM
02/27/17 11:27 PM
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Joined: Dec 2003
Posts: 22,695
Bitopia
jcc
If you can't dazzle em with diamonds..
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If you can't dazzle em with diamonds..
Joined: Dec 2003
Posts: 22,695
Bitopia
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Race pads on street = Front end body work I believe the SuperSpeedway pads often have a low temp usefulness and aggressiveness, since they are seldom used, but hugely important for pit stops, and cooled constantly by high speed air. I suspect we are mainly talking brake compound selection, as the hardware is super expensive, even used. 
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
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Re: Biggest rotor you can fit on a stock 73 A disc knuckle ?
[Re: Kern Dog]
#2260814
02/28/17 12:21 AM
02/28/17 12:21 AM
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Joined: Jan 2003
Posts: 1,482
Lake Orion, MI
goldduster318
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,482
Lake Orion, MI
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 This is the Dr Diff cobra kit (13" rotor) with an 18x9. Just bolted it on, its an easy swap, but haven't driven the car yet. If you wanted opposed piston caliper you would need rotors with a deeper hat (more offset to the knuckle side). The wheels are Torque thrust M's, which are basically mustang wheels as well. There are a lot of pads available for this application (94-04 Mustang Cobra). I also bought the rear kit (11.75 rear disk that is vented), but haven't started the install yet.
'70 Duster 470hp 340/T56 Magnum/8 3/4 3.23 Sure-Grip
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Re: Biggest rotor you can fit on a stock 73 A disc knuckle ?
[Re: Skeptic]
#2262052
03/02/17 04:07 AM
03/02/17 04:07 AM
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Joined: Dec 2010
Posts: 12,375
SoCal
MuuMuu101
I got lucky at Woodward!
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I got lucky at Woodward!
Joined: Dec 2010
Posts: 12,375
SoCal
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How much benefit is there going from the Dr Diff Stage 3 kit with the Cobra calipers and the 4 piston Brembos on the Stage 4? Don't know, but mine stop pretty well with manual brakes. Sorry, I don't have a close up.
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Re: Biggest rotor you can fit on a stock 73 A disc knuckle ?
[Re: goldduster318]
#2265464
03/08/17 10:23 AM
03/08/17 10:23 AM
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Joined: Jan 2003
Posts: 2,580
CT - just outside Hartford
Crazy73
master
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master
Joined: Jan 2003
Posts: 2,580
CT - just outside Hartford
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This is the Dr Diff cobra kit (13" rotor) with an 18x9. Just bolted it on, its an easy swap, but haven't driven the car yet. If you wanted opposed piston caliper you would need rotors with a deeper hat (more offset to the knuckle side). The wheels are Torque thrust M's, which are basically mustang wheels as well. There are a lot of pads available for this application (94-04 Mustang Cobra). I also bought the rear kit (11.75 rear disk that is vented), but haven't started the install yet. Yep, I've got the same 13" kit from Dr Diff but with 17x8 in front, 18x9 in rear. The rear are his 13" kit as well. Hopefully I get to stomp the stop pedal later next weekend, the car isn't on the road yet.
Pete
-1968 Barracuda 4spd 383-6pk
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Re: Biggest rotor you can fit on a stock 73 A disc knuckle ?
[Re: Kern Dog]
#2266144
03/09/17 12:42 PM
03/09/17 12:42 PM
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Joined: Jan 2003
Posts: 2,580
CT - just outside Hartford
Crazy73
master
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master
Joined: Jan 2003
Posts: 2,580
CT - just outside Hartford
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You have a 13" rear brake kit? I didn't know anyone offered anything that big for a rear brake setup. Yep, a 13" rear kit! I bought the kit from Dr Diff back in early 2008, but looking at his website this morning it doesn't appear as though he offers it any longer. Here's a poor pic w/ wetsanded quarter panel, but they are the Cobra rear calipers w/ parking attachment. I believe the rotors in this kit at the time were Porsche.
Pete
-1968 Barracuda 4spd 383-6pk
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