I've been working on these for a while now and with all that I've been doing lately, I just haven't had the chance to get them finished until now. Recipe: 13" rotor, FSL caliper, Hawk HPS pads, spindle, hub, and bracket. Add bolts and a brake line and viola...13" Wilwoods. Here ya go..

Ed

 

Back side:

 

Caliper view:

 

mmmmmmmmmmm beefy



they look great

 

looks good, i bet that caliper costs a small fortune though

 

thats what ive been wanting to put on my ride

 

Nice job Ed! What do those calipers run? Do you have a good source for them? Thanks

 

Honestly, the calipers aren't that bad..Summit Racing carries them for around $150-160 but you can get them cheaper at some race part suppliers. Check Ebay also. This is an easier assembly than C5/C4/LS1s since you don't have to mess with carriers, guide pins, retaining pins, etc. The caliper is one complete assembly.

Ed

 

Very cool. How do you feel about the performance compared to the C5 swap?

 

do you have the bracket designed already?

how much more is something like that compared to a C4HD kit??

 

does the kit use c4 hd rotors/hubs? do gtas fit over them?

 

And best of all it still allowed the steering stop to be retained

 

Alright Ed, talk to me about the caliper bracket, please. Do you have a drawn up plan or something? Is that on a 1LE hub or a standard 10.5" hub?

And what rims are these fitting under?

 

Spill the beans, we want details. I was just about to order up calipers and rotors for the C4 HD setup. But if we're using the 10.5" rotors as hubs and if they fit behind factory wheels then I might go with the Wilwoods.

 

That is the exact same direction I am going at the end of the summer. I am going to be using the standard 10.5" hub with the C5 rotors. A local company here in Minnesota, Track Time Motorsports, is using my car as a test mule for the kit.

 

Ok, I'll try to answer the questions:

Performance: I don't know, they're not installed and "if" I were to put them on, I have no idea when. I'm sure they're gonna be great!

Yes the brackets are designed but the first two pairs are spoken for and that's all I have done right now. I put this setup together for a member but I will duplicate it again without hesitation;

I haven't done any wheel fitups as of yet but I'd venture to say these will fit the same wheels as Spohn's big brake kit will. probably not GTAs without a spacer but 16" Iroc and stock alloys will be fine. I plan on doing some wheel fitups next week. Due to clearance issues, it uses the standard 10.5" hub...C4, C5, LS1 hubs will work. I cut all my hubs a bit differently and will use my "C4" hub. The HD hub will push it out too far for good bracket fit up and I'd like to keep them in as close to stock track width as I can get. Using the HD hub will almost require a 2 piece rotor with a deep offset hat but of course it can be done. If someone wants to foot the bill for the rotors, I'll make a setup with them;

Yep, kept the "steering stop";

I'm also working on a setup with the C5 rotor design but it's not looking good. Again, for good bracket fitment without a lot of custom crap, a 2 piece rotor will probably have to be used, at least with this caliper. The caliper mounts hit the bracket head on so it's either move the rotor inward or the caliper mounts must be moved.

Thanks!

Ed

 

Ed,
Cool deal, are thoses C4 HD rotors you are using?

 

Yessir... That's my used test fit up rotor. I bead blasted it and sent it for coating along with others I had coated. It does the trick.

Ed

 

when can you have more brackets ready? what part number are the calipers?

 

awesome , i like it a lot . I want to do that to mine . I think i need to drop my trans am off to you and have you make some brakes for my chrysler rear end in my ta . that would be hot . So have you tried anything from the new ve tte , the zo6 or will you ?

 

Count me in ;whenever your ready build more!!! They look great!

 

I am doing that exact same thing with the Billet Dynalite caliper and the c4hd rotor. I like the c4 rotor better than the c5 because it has .600 more offset for wheel/caliper clearance. Plus, it's bigger

I have all my parts and I machined my rotors into hubs last nite. I should be able to get it together tommorrow and I'll take a few pics.

 

S10 man, are you talking about a brake swap on your truck? If so, have you looked into the ZQ8 brake swap? I'd go this route on your truck since you can use the ZQ8 spindle with the sealed hub. Look here. You'll have to click the link for the pics, or click the link in my sig:

http://www.montecarloss.com/ubb/ulti...;f=18;t=003061

Ed

 

I saw that, that's where I got the idea to use the Wilwood calipers. I like fixed mount calipers. The problem is that i have dropped spindles. Belltech does make them for the newer blazers, but they are quite expensive. That kills the budget in a big hurry.

edit: I just found them on Summit and they are not that bad. I'll have to check tire to fender clearance with my current setup, and if there is a problem, I'll get the Belltechs and use my modified rotor/hubs on my wife's car. Thanks for the pics.

 

those are sweet I'll be interested in a set when I get back in town. BTW how about brackets to put them on the back. That would look really cool.

 

Personally to me, these boards are for sharing and helping others. Unless you are a board sponsor and have paid for advertisement to sell products here, I believe we should all be sharing specs and info for others to use.

Hence why I have readily giving all my bracket specs when I built my system for others to readily dupilcate free of charge is wanting.

 

CAD design

 

And finished produt + where I had it made and what it cost. Its all on my Wilwood post on my setup for others to copy free.

 

Since the kit is similar to Spohn's and his description says they won't fit behind Firebird rims I've all but given up on this idea. I have Formula and Trans Am rims, unless someone tells me the Wilwoods definately fit I'm going with the C4 HDs. I also like the idea of being able to find calipers and pads at the local parts store... but those Wilwoods look so good and I have a set of old 10.5" rotors halfway machined.

 

Thanks Dean...honestly, I don' t have any dimentions on my brackets yet. I made these with a plexiglass template and just eyeballed it until I got it right. Dean's specs should work with the 13" rotor I used.

Ed

 

Ed, I don't know about that and want to cation anyone about to try that. I run a different offset rotor and possibly even athicker rotor than the C4HD's. My calipers are radial mounted which means I can shim them diameter wise as well as offset and I run a 12.90 rotor, not a true 13". However, with the radial mountings, I can shim my calipers out to a 13.06" rortor no problem with my bracket measurement. Yiou have a "fixed mounted caliper that can only be shimmed offset wise, not radial.

 

Well thats exactly how Smokey Yunick came up with some of his best inovations. Nothing like old school eyeballing to make you the best damn garage in town ;-)

 

I totally forgot that. You're right...your measurements will be different but the bracket hole placement looks the same.

Ed, AKA Smokey Jr.

 

x2??

 

http://www.wilwood.com/Products/001-...-FSL/index.asp

-7476 R/L, 1.1" rotor

Ed

PS: I think I have the C5 Wilwoods figured out too...he he

 

I'm listening.....

I, too, am quite curious about bracket specs. Not looking to duplicate, just work on a bit, but the size, thickness, bolt hole spacing, etc, just gives me something to work with (for the c4HD rotors, not sure what you have up your sleeve as far as the C5's are concerned).

 

tryin to figure out what fittings are necessary to get this to work. now the fitting off the calipers are 1/80-27 to -3, then obviously some -3 hose, but then what fittings to mate up with the stock tubing. will either of these work. btw, these are wilwood part number

Frame fitting, tubing 10 mm x 1.00 I.F. to -3 male
220-6413

Frame fitting, tubing 10 mm x 1.00 bubble flare to -3 male
220-6890

 

You need a -3AN to 1/8" NPT for the caliper, either a straight one or a 90* (I recommend a 90*), and a -3AN to bubble flare for the brake line. The bubble flare one you posted is for the hard line adapter and looks to be correct. Earl's P/N is 989534:

http://store.summitracing.com/defaul...h.asp&x=39&y=9



Ed

 

how long of lines are needed to hook up with the stock lines?

 

ed,this is an asumption(or more of q guess)cant you buy a big brake kit(6piston 13" rotor) for a 4th gen and just use the braket to adapt and modify your spingle for it to fit?if im wrong and im sure i am wouldnt that be easy and cheap?

 

I guess you could but I'm using the C4 HD rotor and not a 4th gen LS1 rotor, and I would think that would make a difference.

As for measurements, Dean posted his dimentions on his bracket. The spindle holes are 4.82" apart, the caliper mounting holes are 3.5" apart. All you have to do is get the spacing between those two sets of holes right and make the bracket.

Dean used 17" lines, I figure 16"-18" lines will be OK. I just delivered this kit yesterday and used 16" lines in it, plus the added length the adapters use.

Ed

 

Hi Ed,
How much for your kit?? I would be replacing 1le fronts.

Thanks, Joe

 

I in fact did purchase the Wilwood 4th gen LS1 setup as a base kit and modified it to fit from there. I have a few posts on the entire build under "Vsixtoy" and "RTFC". I had to swap the radial mount from the kit to another Wilwood version with a different spread and offset than the one in the LS1 kit. All the build is documented in the threads under the search names above. It fits under a factory 16" IROC rim.

 

^^^^^^^^^^^^^^^^^^^^^^^^^^^^

What he said. It will work but you'll have other mods to do to get it right.

Ed

 

im getting off topic herebut why would you have to do any modding to get the ls1 wilwood 6 pots to fit if you just drilled your spindles for ls1 brackets and then milled the stock rotors down into hubs . I dont understand why you would have to be doing other things. I just dont understand , could someone please explain why anything else would have to be to make them work . Cause id like to have the ls1 6 pot wilwood brakes over the c5 brakes.

 

1) The "offset" will be different on the bracket mountings with the steel rotors turned into hubs than what I posted in my GlobalWest aluminum hubs.

2) the radial mount brackets that come with the kit are a 5" mount spread and will NOT work on the spindles. You have to somehow have them swapped out to the 3.5" spread radial mounting brackets
*Note* that the radial mount brackets are separate fromthe caliper mounting brackets. Radial mount calipers have a separate bracket that allows for radius shimming as well as the standard offset shimming that can be done with the caliper mount.

So to be clear- You need boith the radial mount bracket AND then make a set of caliper mounting brackets that bolts in holding the radial mount braket to the spindle. Standard calipers already have "fixed" mounting lugs so the caliper lugs thenselves mount directly to a bracket that then mounts to the spindle.

Based on the caliper offset to the wheel mounting surface, you will have to fit *YOUR PARTICULAR SETUP* individually and find out what if any wheel spacer is needed so the caliper does not hit the spokes of the wheel on the backside.
*Note* the SL-6 radial mount calipers supplied in the LS1 kit have a narrow outer body to help with wheel clearance issues- but isstill not enough due to the LS1 rotor offset being shallower than the 3rd gen rotor offset.

 

radial mounting bracket on the right is the one that comes in the Wilwood LS1 kit- it is made to mount the caliper directly to the 4th gen spindle. It will not work on the 3rd gen application. You have to swap it to the 3.5" spead radial mount bracket.

 

Lastly, this is how the two brackets mount together and then the caliper can mount when you are using radial mounted calipers like provided in the LS1 kit.

All of this info is ALREADY POSTED on the links I said to search above. If you simply take the time to read then you can easily see all other up coming questions and also have plenty of info to make whatever changes to your own specific build using steel turned dow hubs with a different offset.

 

Boyd's, like Dean said there's a TON of measurements you have to figure out and check for fitment before you can just go install one of these things. The same redrilled bracket just won't work on Wilwoods and C5s or LS1s. You have different rotor diameters and thicknesses and totally different caliper designs and offsets, so there's a lot to firure out.

Dean, in your bracket drawing, I'm unclear on the measurement from the spindle centerline to the bracket mounting holes on the spindle. Looks like 3.325" R to me, just checking...thanks.

Ed

 

That is correct Ed, it is 3.325" radius.

I am sorry to be sort of hijacking your thread especially with picture files that take time to load. Just trying to show anyone interested that yes it seems complicated and there are many figures, but when you have a format as to whats been tried and true as a reference then youcan possibly make your own variations from *our* examples.

Keep up the good info