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120-7381 Wilwoods on 73+ spindles
#2728056
12/29/19 05:00 PM
12/29/19 05:00 PM
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Joined: Jan 2005
Posts: 4,404 Michigan
MarkZ
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Posts: 4,404
Michigan
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Looking to upgrade to a four piston caliper on the front of the car. I already have 11.75" plated/slotted rotors upfront that I just put on last year with new Timken bearings. If possible I'd like to keep the rotors. I see that Dr. Diff offers the necessary parts to bolt on Wilwood 120-6815 calipers on. These don't have dust seals though and are ear mount. I would like to use these: 120-7381. Almost the exact same caliper, but with seals and radial mounting. I know Andy offered a bracket to mount these to earlier spindles. Anyone know if there is a bracket to attach these to 73+ spindles? Thanks...
Last edited by MarkM; 12/29/19 05:01 PM.
1987 Fifth Avenue - 512/518/D60
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Re: 120-7381 Wilwoods on 73+ spindles
[Re: DoctorDiff]
#2728561
12/31/19 02:32 PM
12/31/19 02:32 PM
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Joined: Jan 2005
Posts: 4,404 Michigan
MarkZ
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The 11.75" rotors I have on the car now are 1" thick. Was hoping for an easy solution to a 4 piston caliper using the rotors I have on the car now. If I have to replace the rotors it's not the end of the world.
Cass, I'll give you a call after the new year. Thanks.
1987 Fifth Avenue - 512/518/D60
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Re: 120-7381 Wilwoods on 73+ spindles
[Re: MarkZ]
#2732172
01/11/20 04:30 PM
01/11/20 04:30 PM
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Joined: Jan 2003
Posts: 30,989 Oregon
AndyF
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I Win
Joined: Jan 2003
Posts: 30,989
Oregon
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Re: 120-7381 Wilwoods on 73+ spindles
[Re: AndyF]
#2733144
01/14/20 09:48 PM
01/14/20 09:48 PM
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Joined: Jan 2005
Posts: 4,404 Michigan
MarkZ
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I ordered the second caliper and SS flex lines from Summit. Trying to figure out a conversion to manual brakes at the same time. This was something I wanted to do last year, but never got around to it. The F/J/M cars have a different stud spacing on the booster than the older stuff. The horizontal spacing looks to be the same and the vertical I should be able to just drill a couple hols in the firewall. The way that the brake pedal bracket is made it should work. This should allow me to run a Baer master cylinder with one of your adapters. Slow moving though with Winter though.
1987 Fifth Avenue - 512/518/D60
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Re: 120-7381 Wilwoods on 73+ spindles
[Re: MarkZ]
#2736856
01/26/20 06:15 PM
01/26/20 06:15 PM
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Joined: Jan 2005
Posts: 4,404 Michigan
MarkZ
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Finally got some garage time in and I took it to both mock up the calipers and measure the piston diameter on the rear calipers. It basically fell right together - looks great.. I just need to figure out what master cylinder I'm going to need (that'll be a separate thread) after I get the pedal ratio.
1987 Fifth Avenue - 512/518/D60
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Re: 120-7381 Wilwoods on 73+ spindles
[Re: krautrock]
#2737627
01/29/20 09:43 AM
01/29/20 09:43 AM
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Joined: Jan 2005
Posts: 4,404 Michigan
MarkZ
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what caliper mount did you use? They're from Andy at AR Engineering, but that kit was discontinued. I got lucky and he had one last set laying around.
1987 Fifth Avenue - 512/518/D60
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Re: 120-7381 Wilwoods on 73+ spindles
[Re: MarkZ]
#2809586
08/16/20 08:35 PM
08/16/20 08:35 PM
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Joined: Jan 2005
Posts: 4,404 Michigan
MarkZ
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Andy, just wanted to give an update and say thanks again. Got the calipers on and took the car for a long trip with a couple passes on Woodward yesterday. Performed great.
1987 Fifth Avenue - 512/518/D60
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