Re: Is 380 mm rotors large enough for you?
[Re: astjp2]
#1556645
02/05/14 04:46 PM
02/05/14 04:46 PM
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You guys are going WAY too deep on this.
Finishing caliper brackets down to the micron is not necessary. If you can get the bracket mounting surfaces flat to the hundredth and bolt holes to the same degree you will have a perfectly usable bracket.
The factories cast the parts, spin off a few flat spots, and send them down the line.
Sure, perfectly machined parts are pretty but these are brake parts. Function over form. The stress loads they see are easily overcome with 1018.
Mine are made from Scrapbinuim and work great.
You guys are going down the overengineering drain. Step back and think about it.
Samy, here's your homework assignment. Using a friction coefficient of .75 for the brake pads figure out the force applied on a caliper bracket. Use common values for variables such as vehicle weight, speed, and tire contact.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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Re: Is 380 mm rotors large enough for you?
[Re: cudazappa]
#1556648
02/06/14 12:00 AM
02/06/14 12:00 AM
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astjp2
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I dont need it that thick, it is just comes that way as a prehard material. I used it because I didnt have to mill the surface, I just had it cut to shape and install. I have them on my charger now, using 2006 crown vic rotors and dual piston calipers. The calipers were 50 each, rotors 90, the adapters were about 200 with travel and cutting, pads are what you want...I spent 40 for the napa gold ones. That is about as cheap of a modern dual piston disc brake setup as you can get. Tim
1941 Taylorcraft 1968 Charger 1994 Wrangler 1998 Wrangler 2008 Kia Rio 2017 Jetta
I didn't do 4 years and 9 months of Graduate School to be called Mister!
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Re: Is 380 mm rotors large enough for you?
[Re: astjp2]
#1556649
02/06/14 02:09 AM
02/06/14 02:09 AM
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Posts: 3,001 Coram, NY
Pool Fixer
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Quote:
I dont need it that thick, it is just comes that way as a prehard material. I used it because I didnt have to mill the surface, I just had it cut to shape and install. I have them on my charger now, using 2006 crown vic rotors and dual piston calipers. The calipers were 50 each, rotors 90, the adapters were about 200 with travel and cutting, pads are what you want...I spent 40 for the napa gold ones. That is about as cheap of a modern dual piston disc brake setup as you can get. Tim
those look like rotor sliding over hub.... what are you using for hubs? summit has 2006 crown vic rotors sllotted/drilled for 55 each. besides the rotor being a litttle bigger than the standard 11.75 stuff, seems like the consumable pieces will always be cheaper and dual piston caliper is nice too. you should mass produce those brackets
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Re: Is 380 mm rotors large enough for you?
[Re: Pool Fixer]
#1556650
02/06/14 04:07 AM
02/06/14 04:07 AM
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astjp2
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I asked Andy if he wanted the cad layout and he politely declined because he had enough brake kits already. I can have more made if someone is serious about the crown vic stuff, Its just materails and time on the waterjet. This is an option for the drum brake spindles and hubs for a b-body. The rotor hat is not very high though and you need to put disc brake wheel studs in. I have not done the final assembly on the car yet, only mockup. Its beefy~!
1941 Taylorcraft 1968 Charger 1994 Wrangler 1998 Wrangler 2008 Kia Rio 2017 Jetta
I didn't do 4 years and 9 months of Graduate School to be called Mister!
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Re: Is 380 mm rotors large enough for you?
[Re: 68cuda440]
#1556655
03/17/14 06:34 AM
03/17/14 06:34 AM
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Well I took an old hub from a b-body drum brake system. I made a few drill fixtures so now I can redrill the 380mm rotors. The rotor diameter is about .060 larger than the hub register, so I took some safety wire and wrapped it through the original bolt holes. It now has a nice fit and is centered. Next, I need to figure out what drill bit I need to drill the holes to. I am thinking that I may use a roto broach to bore the holes. I am making progress, not as fast as I would like but its still progress. Tim
1941 Taylorcraft 1968 Charger 1994 Wrangler 1998 Wrangler 2008 Kia Rio 2017 Jetta
I didn't do 4 years and 9 months of Graduate School to be called Mister!
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Re: Is 380 mm rotors large enough for you?
[Re: astjp2]
#1556658
03/19/14 03:24 PM
03/19/14 03:24 PM
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The lugs do not need to press into the rotor. The OEMs use a single screw to hold the rotor in place. You can drill and tap your hub to match if you like.
The size hole will depend on the lug used. If the shank poke out the front side of the hub the rotor will need to clear it. A properly sized lug will not have splines protruding above the hub.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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Re: Is 380 mm rotors large enough for you?
[Re: astjp2]
#1556660
03/20/14 05:12 PM
03/20/14 05:12 PM
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That's a good place to start if the lugs drop down in size at or before the hub surface. A 1/2" lug is under .500" but you need to be dead on with your new lug holes. 5 thousandths is pretty tight if the holes are off.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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Re: Is 380 mm rotors large enough for you?
[Re: feets]
#1556661
03/30/14 10:45 PM
03/30/14 10:45 PM
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Well I was able to start boring the holes, I made some drill bushings and was able to center the hub. I got the pilot holes drilled and went to bore the 1/2" holes and broke the broach. Now to get a replacement broach...which the repair part costs more than the kit did. Tim
1941 Taylorcraft 1968 Charger 1994 Wrangler 1998 Wrangler 2008 Kia Rio 2017 Jetta
I didn't do 4 years and 9 months of Graduate School to be called Mister!
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