Specific distance on Corvette C5 wheel hub

[76mx]

1.86(hub thickness) - .29(hat offset) - .55(half of rotor thickness) - 1.13("B" offset in given design drawings) = -.11. This is the dimension you are looking for, expensive bracket eliminated.

[plans4sale]

 I know these drawings, but they don't provide enough information for me to design my wheel hub mounts accordingly. I plan to contact the company for more detailed dimensions anyway.

[76mx]

Bobi,
   Using your link, go to the Wilwood website. Select your product, click on the drawing that has a few dimensions and it will expand to a full set of design drawings. 

[plans4sale]

 I totally agree with you that it would be better have the mounting points designed specifically for the Wilwood brake calipers without the need for those expensive adapters they provide in their brake set. I can do so in the future. However, at this moment due to unavailability of these brakes in my hands nor any accurate CAD data of them I can't predict where to design the mounting points.

[76mx]

OK got it. I don't want this to turn into a debate but I stand by my original statement. It is not "Just an alternative option for those who need it", it will not fit that width rotor. On the other hand, if you will move the bracket on your spindle, you can still use the setup you describe for your car and also allow anyone else the option to use this parking brake along with many other options. The only thing you loose by moving the bracket is the expensive bracket that bolts to the bracket when using your setup.

[plans4sale]

 Maybe I had to explain it more clean in the first place. The rear brake set by Wilwood that I will most likely use for my own build is this one http://www.wilwood.com/BrakeKits/BrakeKitsProdRear.aspx?itemno=140-9119-DR&year=2000&make=Chevrolet&model=Corvette&option=C-5+%26+Z06 that is designed to utilize the stock C5's parking brake assembly, which is totally fine for me. I mentioned the other rear brake set with integrated park brake just as an alternative option for those who need it. Thanks

[76mx]

"First, let me make it clear that I have never stated anything about me using (or recommending) the additional Wilwood parking brake calipers". Sorry, I totally misunderstood your statement "However, if needed, Wilwood also has a complete solution for the rear brakes and parking brakes". I thought you were talking about Wilwood's complete solution for parking brakes. Just trying to help.

[plans4sale]

Bobi,
   Yes and no. Good to see you are going with Wilwood but you could accomplish much more with considerably less expense if you selected your components separately instead of using those packages. That Corvette replacement package uses Dynapro calipers. They come in either radial mount (mounting bolts parallel to the rotor face) or lug mount (mounting bolts perpendicular). Your package uses a radial mount and then a bracket to offset and mount to the stock Corvette spindle. Spec the lug mount ones, move the spindle bracket to accommodate it in your design, and get rid of that expensive bracket that bolts to a bracket. That package also uses 1.1 width rotors. You only need this in a 4,000 pound car on a road course, the other 99.99% of the time it is just added rotating weight and expense. A .81 rotor is less expensive and will do the same thing. This rotor uses a different hat pattern so you have offset choices, the 1.1 has only one .88 offset hat option. With the package, you are also stuck with the Corvette diameter rotor that only looks right in a Corvette sized wheel. Purchased separately, you can get any diameter your customer needs.  The .81 Dynapro caliper is the only one in the series that is available red powdercoated. With the package, you get the rear hat that has the parking brake drum built in. You do not need it, use the much less expensive regular hat and the Wilwood parking brake that you mentioned. Attached is a picture of the latest version of it. They are about $200 for the pair, the Corvette ones are many times that plus the more expensive Wilwood hat for them, you can save $1,000 there and have a better system. Be aware that this parking brake only works with the .81 rotor, not a 1.1, so be careful about your statement that you can use these on the packages that you selected, you can't.

Charley       

 Charley,

 First, let me make it clear that I have never stated anything about me using o(or recommending) the additional Wilwood parking brake calipers. They are a possible option that will surely require custom fabricated mounting to be attached on any wheel hub that was not specifically designed to use this package. In fact, my wheel hubs (the rear one seen in the YouTube video I posted above) come with no caliper support integrated. It's up to the builder to choose the most appropriate brake system for his/her car as needed. For convenience to starters, recently I decided to offer an optional quick solution for the brake caliper mounting, adding a metal plate that mimics the stock C5's exact position in case that the builder wants to use the 14.25" front and 14" rear Wilwood brake sets, whose links to the company's official website I also posted above. Obviously, the stock C5 brakes are no option due to the quite small size compared to the larger wheels and stopping power needed in an Aventador replica. Back in 2014 I contacted the company and this is what I was recommended for wheel size 19" front and 20" rear which I used as a reference for the design of the FLT kit car. The latter uses a slightly modified version of my Govedo chassis that I primarily designed for Aventador replicas. Both Wilwood brake rotors look quite nice on those wheel sizes and I believe they will perform just as good. You are correct that the more options people have, the better. At this moment, I have no access to a wide variety of brake systems to test and measure, however, I may consider working on more solutions in the future if I take my hands on those brakes or factory accurate CAD data.

 Thanks,

 Bobi

http://i.imgur.com/c554UCq.png

[76mx]

Bobi,
   Yes and no. Good to see you are going with Wilwood but you could accomplish much more with considerably less expense if you selected your components separately instead of using those packages. That Corvette replacement package uses Dynapro calipers. They come in either radial mount (mounting bolts parallel to the rotor face) or lug mount (mounting bolts perpendicular). Your package uses a radial mount and then a bracket to offset and mount to the stock Corvette spindle. Spec the lug mount ones, move the spindle bracket to accommodate it in your design, and get rid of that expensive bracket that bolts to a bracket. That package also uses 1.1 width rotors. You only need this in a 4,000 pound car on a road course, the other 99.99% of the time it is just added rotating weight and expense. A .81 rotor is less expensive and will do the same thing. This rotor uses a different hat pattern so you have offset choices, the 1.1 has only one .88 offset hat option. With the package, you are also stuck with the Corvette diameter rotor that only looks right in a Corvette sized wheel. Purchased separately, you can get any diameter your customer needs.  The .81 Dynapro caliper is the only one in the series that is available red powdercoated. With the package, you get the rear hat that has the parking brake drum built in. You do not need it, use the much less expensive regular hat and the Wilwood parking brake that you mentioned. Attached is a picture of the latest version of it. They are about $200 for the pair, the Corvette ones are many times that plus the more expensive Wilwood hat for them, you can save $1,000 there and have a better system. Be aware that this parking brake only works with the .81 rotor, not a 1.1, so be careful about your statement that you can use these on the packages that you selected, you can't.

Charley       

[plans4sale]

 Thank you for the confirmation, 76mx! I appreciate your input and I would like to mention that my wheel hubs are primarily designed to use afternarket Wilwood brake assemblies front and rear. This is what I listed a year ago somewhere in this forum or some other place, as I definitely want to avoid the stock Corvette C5 brakes. The C5 bolt pattern for mounting the brake calipers is only necessary for the Wilwood brakes that use these to install an additional adapter. The exact part numbers for my selection of Wilwood brakes are the following:
http://www.wilwood.com/BrakeKits/BrakeKitsProdFront.aspx?itemno=140-10163-DR&year=2000&make=Chevrolet&model=Corvette&option=C-5+%26+Z06
http://www.wilwood.com/BrakeKits/BrakeKitsProdRear.aspx?itemno=140-9119-DR&year=2000&make=Chevrolet&model=Corvette&option=C-5+%26+Z06
 The rear brakes use the C5's stock parking brake pads. However, if needed, Wilwood also has a complete solution for the rear brakes and parking brakes.

[76mx]

Bobi,
   This is a long answer but there is info here others too might find useful. Yes, that is the correct distance for the Corvette rotor and caliper, but that is a poor rotor and caliper selection in my view. The one piece rotor and hat limits your spacing options, the rotor diameter is only correct if you use the stock Corvette wheel size which eliminates 20" wheels or 15" on a Countach, your selection of master cylinders is limited and may have to deal with a booster and ABS, and finally it is just expensive. I cannot find a single upside to Corvette brakes. For the price of just the Corvette parking brakes you are halfway to the price of an aftermarket system like Wilwood. With a separate hat and rotor, you now have options on offset, rotor width, and rotor diameter, which now allows you a much greater wheel selection. Also the master cylinders are simple, economical (about $40) and tailored to this system. Attached is the suspension drawings for my new aluminum composite monocoque kitcar chassis and they show a one piece billet aluminum hub. I used to do them in steel, somewhere in this Forum is the article that I wrote for Kitcar Builder about that, but I have found the billet to be easier and cheaper in the long run. What I want to show you is the separate bracket for the caliper and parking brake caliper. That way I have one generic upright and I can tailor a simple bolt on bracket to suit any offset or rotor diameter that a customer may need for their particular circumstance. The realistic hub offsets are .41, .56, .71, and .81., and I can use any rotor diameter and width. The arrows drawn on it show the assembly. Either way you do it, do what Jim said to weld it, but take it one step further. Instead of cardboard shims, use two fittings, one that threads to your caliper mated to another that has an air hose fitting, and make a $5 adapter. Align everything, shoot your caliper full of air, and weld it. Keeps it dead nut through the cooling process too.       

[plans4sale]

 Thank you for the quick reply, Jim! I agree with you that the method you described is the best way to find out this distance on a custom wheel hub. However, I don't have access to C5 wheel hub or brakes right now, but my intention is to use the exact same mounting points on my custom made wheel hubs (rear one is seen here: https://www.youtube.com/watch?v=Umg3ygpBWSE ). Currently, I only have a perfectly accurate 3d CAD model of the C5's hub-bearing assembly that I measured a while ago and a 3d model of my wheel hubs.

 Bobi

[jdinner]

If you have the front steering knuckle you can do your measurement there, it's the same.
What I did was mount the bearing and rotor. Install the caliper onto the anchor and add in the brake pads also bolt on the metal mount that needs to be welded. Add equal sheets of thin cardboard between the pads and rotor until it is tight fit onto the rotor.
By doing it like this, the caliper should be centred onto the rotor and now you can weld the bracket to the upright.

[plans4sale]

 Hey guys, I was wondering if anyone have an access to Corvette C5 wheel hub (a.k.a. upright) and could take a measurement to help me verify a specific distance around the brake calipers mounting that I need. I only found the distance of that particular area on the NAERC's rear wheel hub, but it won't hurt to hear your opinion since it's preferable to know how is that on the genuine C5 wheel hub instead. As far as I know, front and rear brake caliper mountings on the C5 must be the same. To better show you what distance is of my interest, I attach an image below. Thanks!