CP RACING 1st gen 79-85 Big Brake kit, now available.
06-17-04 | 07:20 PM
#51
Originally posted by Frankenrex
OK, the ad copy says that we supply "T2 brake rotors and callipers, 5 bolt(T2) or 4 bolt(base model) hub assemblies (including wheel bearings/seals/races), brake pads."
So, how do the T2 rotors work with the 4-bolt hubs (I have a GSL-SE suspension in the '79)?
T2 rotors are bigger than base model rotors, besides having 4-piston calipers, right? So you can't just use base-model rotors with the T2 calipers and CP brackets.
I have an idea given to me by some Chevelle guys over on chevelles.com - they're upgrading their front discs to 13" Corvette discs by machining the braking surface off of the one-piece hub/rotor (like first gens) to create a hub, and then fitting the seperate Corvette 13" rotor onto the hub, and fabricating brackets to mount the matching 4-piston caliper.
I see no reason that this couldn't be done with FC rotors and calipers on a GSL-SE hub that's been machined down. The only sticky bit is the whole T2=5-bolt thing. May be able to use T2 calipers on base rotors... lose some braking force that way, though. Shouldn't cost much to have T2 rotors redrilled, I imagine.
OK, the ad copy says that we supply "T2 brake rotors and callipers, 5 bolt(T2) or 4 bolt(base model) hub assemblies (including wheel bearings/seals/races), brake pads."
So, how do the T2 rotors work with the 4-bolt hubs (I have a GSL-SE suspension in the '79)?
T2 rotors are bigger than base model rotors, besides having 4-piston calipers, right? So you can't just use base-model rotors with the T2 calipers and CP brackets.
I have an idea given to me by some Chevelle guys over on chevelles.com - they're upgrading their front discs to 13" Corvette discs by machining the braking surface off of the one-piece hub/rotor (like first gens) to create a hub, and then fitting the seperate Corvette 13" rotor onto the hub, and fabricating brackets to mount the matching 4-piston caliper.
I see no reason that this couldn't be done with FC rotors and calipers on a GSL-SE hub that's been machined down. The only sticky bit is the whole T2=5-bolt thing. May be able to use T2 calipers on base rotors... lose some braking force that way, though. Shouldn't cost much to have T2 rotors redrilled, I imagine.
The CP kit looks nice but I still prefer my 7's only kit
06-17-04 | 10:27 PM
#52
Originally posted by fatboy7
Frankenrex, the hub and the disk are separate on 2nd gens. So it is conceivably possible to use base hubs and 4-pot discs (note TII's aren't the only ones that came with 4-pots on the front, GXL's in the S4 and GTUs in the S5 IIRC also came with them)
Frankenrex, the hub and the disk are separate on 2nd gens. So it is conceivably possible to use base hubs and 4-pot discs (note TII's aren't the only ones that came with 4-pots on the front, GXL's in the S4 and GTUs in the S5 IIRC also came with them)
That's what I'm trying to get at. I emailed CP racing at the address we were told to send questions to. No response yet.
06-18-04 | 09:31 AM
#53
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From: Drifting a Roundabout near you!
machining the braking surface off of the one-piece hub/rotor (like first gens) to create a hub, and then fitting the seperate Corvette 13" rotor onto the hub, and fabricating brackets to mount the matching 4-piston caliper.
Need a real shop, engine swaps and welding outside is a real pain (costco canopies have saved my life, got 3 'em with 100 amps of power to run the "shop")
06-18-04 | 11:15 AM
#54
NAh, I stole the idea from some GM A-body guys! 
I've got a garage, but it's for soring the parts and the project car. And junk. the running cars get worked on outside, in the blazing Texas sun. Need to buy a couple of those canopies.
If you look at the kit that PaulAber posted a picture of above, it looks like the center hub may be a standard SE or 12A hub/rotor machined to fit the seperate disc. Might not be, but that should work.
Like I said, I want to use FC calipers and discs mounted on the SE hub. Have ot look at what it'll take to make a caliper mount. Fortunately for me, my dad has a lathe and mill in his garage...
I've got a garage, but it's for soring the parts and the project car. And junk. the running cars get worked on outside, in the blazing Texas sun. Need to buy a couple of those canopies.
If you look at the kit that PaulAber posted a picture of above, it looks like the center hub may be a standard SE or 12A hub/rotor machined to fit the seperate disc. Might not be, but that should work.
Like I said, I want to use FC calipers and discs mounted on the SE hub. Have ot look at what it'll take to make a caliper mount. Fortunately for me, my dad has a lathe and mill in his garage...
06-19-04 | 12:58 AM
#56
Rotary Freak
Joined: Oct 2002
Posts: 2,401
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From: So Cal
Originally posted by Frankenrex
Got a reply from CP Racing. They say that you have to redrill the T2 rotors if you need or want 4-bolt hubs, or they can supply them re-drilled.
Got a reply from CP Racing. They say that you have to redrill the T2 rotors if you need or want 4-bolt hubs, or they can supply them re-drilled.
06-19-04 | 05:59 PM
#57
lol....such an optimistic krew.......
Well, if they redrill them, I wonder if they could reproduce the 4 X 110 mm pattern? I love my Weds Autobahns and, at 15" already, they should clear the calipers, right?
...I guess I'll pop 'em an Email, too....
...
Originally posted by Frankenrex
Got a reply from CP Racing. They say that you have to redrill the T2 rotors if you need or want 4-bolt hubs, or they can supply them re-drilled.
Got a reply from CP Racing. They say that you have to redrill the T2 rotors if you need or want 4-bolt hubs, or they can supply them re-drilled.
...I guess I'll pop 'em an Email, too....
06-19-04 | 06:46 PM
#58
Redrilling rotors is relatively easy. Hubs not so easy. You could always try the truncated-rotor-as-hub approach that I've been making noise about.
I'll try it when I get a couple dozen round Tuits.
I'll try it when I get a couple dozen round Tuits.
06-20-04 | 03:55 PM
#59
I too apreciate CP's effort. It is definatly a good thing to see people dedicated to the FB. Personally, I am sick of FC and FD lime light. I guess that's what we get for liking old 100hp cars. It's tough for any shop to get started, so keep it up CP!!
. It's tough for any shop to get started, so keep it up CP!!
06-20-04 | 07:36 PM
#60
Senior Member
Joined: Apr 2004
Posts: 356
Likes: 0
From: Springfield or
yeah, and on a side note, if these will work with the S model Im tottally in I dont care the cost, Ill get the money, I just experianced MAJOR brake fade o my way home today, car would barely stop, my brakes hardly worked, if this kit will in nay way help me counteract this, Im all for it
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