What do I need to make the front 12" rotors from a 2002 Camaro SS work on my factory 69 disc brake spindles? I'd guess that I want to find a set of drum hubs to machine down?

Thanks, Lance

1 - Drum or disc spindles (machine work required on drum, spacer required on disc)
2 - Drum hubs w/longer studs (turned down to fit the 12" rotors)
3 - Caliper mounting adapters
4 - proper brake hoses to connect calipers to hard lines.

As well, wheel bearings and you'll need the proper master cyl and valving to control the new disc's.

Maybe this will help some... http://www.camaros.net/techref/articles/ftecref012.html

I have the 2002 booster and master that I was planning on using.

Without seeing a drum hub...you turndown the center dia the the hole in the rotor fits over?

I thought I read elsewhere that the LS1 calipers bolt right on? Am I mistaken?

Lance - Check out the article I linked and look at the individual picture links. You'll find most if not all of your answers. Example the pic of the drum hubs tell you what needs to be turned down.

Yes, you will need a specially made mounting bracket to bolt up LS1 calipers to the 1st gen spindles.

Dennis,

Thanks, I looked at the link you put up. So you machine the outer dia to fit inside the hub on the rotor. got it. Have any ideas where I can get a cheap set of drum hubs ?

The caliper mounting bracket you show is for C5 brakes? Would it be the same for a F-body LS1 caliper?

Where did you get your brake flex lines from?

Lance

I just put C5 calipers on mine after originally considering LS-1, and did a bit of research. - If you're set on LS-1 calipers, this is my understanding:

If you get a C5 caliper mount bracket, you need to use C5 abutments (baskets) and the LS-1 caliper will bolt to the C5 abutment. The LS-1 abutment will not fit the C5 bracket. (different bolt spacing)

The sytems that Dennis and I are using is actually a hybrid - it uses C5 calipers with C4 rotors. This setup allows for a bit more wheel clearance than the full C5 caliper/C5 rotor setup. You could do the same - C5 caliper BRACKETS and BASKETS with an LS-1 caliper and C4 rotors.

If you want a full LS-1 setup, Andrew (X33D80) has it on his car - he was very helpful with getting me going and perhaps he could help you as well on the fronts.

I needed drum hubs for mine - I posted the need here in the Forum Classifieds and had several responses in a short time. Folks are constantly doing away with their front drums in favor of a factory disc setup. They're out there.

Al,

Thanks for the info. I have a couple of dumb questions though. What's an abutment (basket)? Is it the actual "U" shaped part of the caliper assembly? I really would like to use all LS1 stuff as I pulled it all off the donor car for my drivetrain for free :) I'll try Pm'ing Andrew.

Thanks

Here's how "I" describe the parts - the "bracket" is the part that bolts to the spindle. The "abutment - also known as a "basket" bolts to the "bracket". The caliper bolts to the "abutment/basket". Confused? It took me awhile, too. Andrew should be able to help - tell him Al said Hi!

Here is a pic of the bracket

http://img.photobucket.com/albums/v61/gort69/DSCN0138.jpg

Here's the bracket and the abutment/basket

http://img.photobucket.com/albums/v61/gort69/DSCN0145.jpg

And here's the whole enchilada

http://img.photobucket.com/albums/v61/gort69/DSCN0142.jpg

I have the C5 (12.7" x 1.25") rotors and Calipers, with my wheel choice I had enough clearence. There are plenty of adapters/brackets available for LS1/C4 & C5 combos, check ebay amung other places. Follow some of the links at the end of the brake article for tons of info, I know David's got a templet as well as links to places to get parts...

I'm doing the LS1 conversion now and I'm pretty sure the C5 or C4/C5 brackets will not work. The LS1 rotor is an inch smaller in diameter so the mounting holes must move about 1/2" in toward the spindle center. The offsets are quite a bit different too. BRP Hotrods is the only place I know that makes and sells the bracket although I am making up my own bracket to use a different offset spindle.

The hub OD needs to be turned down to 5.75"

Mine fit at 5.90" and I have fit both LS1 and C5 rotors on that. Are you sure on the 5.75"? The .15" difference seems like a lot of difference.

I just gotta throw my "pdqCBB" 13" rotor/big single piston caliper front setup out here for the poor man's way of doing this!!

And consider this info!!

1. Drum hubs w/OD cut down;

2. 2-piece rotor/hubs less rotor w/ OD cut down; and finally

3. Cast, 1-piece rotor/hubs w/ the rotor cut down to fit for use as hubs!!

The drum hub has about 9/16" per side narrower track than the 2-piece and cast, rotor/hub b/c the wheel mount surfaces were moved in-board that amount on each side is why so watch wheel well lip clearance here!!

David Pozzi, (the Mod here), has a pic of this on his great web site so hunt it up

Do a search under my handle, it's all here somewhere.

AND I mention this b/c even tho my setup is diff. than what you are asking about, a LOT of the info I posted about still pertains to all types of conversions!!

pdq67

I did put the LS1 brakes on the car before my goals changed to put the car back original as closely as I could. That was the reason for choosing the 16" TTII wheels, because contrary to what may be reported, 15" Ralley wheels won't fit over the 12" LS1 caliper. I just call them my J-LS1 (not JL8) brakes. On the positive side they stop great and look good too.

They sell a kit to install LS1 brakes on a first gen complete with modified hubs for $250 at BRPhotrods.com He also sells a $40 kit for the rear.
Don

Mine fit at 5.90" and I have fit both LS1 and C5 rotors on that. Are you sure on the 5.75"? The .15" difference seems like a lot of difference.

Dennis - I think it might depend on whose rotors you buy. I had heard that on my rear C4's I'd probably have to have the axle flanges turned down.
The rotors I bought (Car Quest premium made by the C&H INA Company, aka AIMCO) fit without modifying my axles.

That's cool to know Al, are you using Chevy axles or aftermarket? My rears from Touring-Classics had to be taken down. I gave the machinist the axle and the rotor, he didn't like the idea of just taking off x amount.

My axles are stock 10 bolt axles.

My axles are stock 10 bolt axles.

Thanks Al, I don't know that much about axles but mine are stock 12bolt. Maybe we are on to something...

We could be - but I need to clarify one point. My rear brakes are from a 93-97 Z/28. These are commonly referred to as C4 brakes, but I believe they have a slightly smaller diameter rotor than the Corvette, but I'm not positive. Anyway, the rotors I ordered were the Camaro rotors, not the C4 Corvette.

"Shade-tree" all the way, but you can use a trusty angle grinder w/ your axles turning idling along to reduce the OD IF you are so inclined to..

pdq67

Mine fit at 5.90" and I have fit both LS1 and C5 rotors on that. Are you sure on the 5.75"? The .15" difference seems like a lot of difference.

Well that's only 0.007" on the radius and I guess I could've made 5.90 work but I would be fearful of the od binding in the rotor. It also depends on how clean the corner is machined in the rotor.

I used hubs from a Lemans/GTO that have 5/16" more offset than the factory drum hubs. Combined with the 1/4" thick rotor hat and I'm back to where I started with factory discs in terms of wheel position.

He, He!!

You guys aren't paying the old man no mind..

He, He!!

pdq67