I dont know if this has been posted anywhere but Casner and I just found out that on my car, 85 turbo with 88 turbo hubs and stock 88 turbo rotors, that his 88 NA wheels (yes the 15" wheels) fit over the 90TT aluminum caliper (for 30mm rotor) and bolt up just fine with no rubbing. The only thing I can confirm is the 87-89 NA wheels. I dont know about the other stock 15" z wheels.
Also, the 90 TT calipers (ones for 30mm rotors) do not fit center over the stock 88t rotor (24mm). It appears as though the 88t rotor needs to move out 2mm or the caliper needs to move in 2mm. You cant really put washers behind the rotor to bring it out (just a bad idea) so I would think you would have to take off some material from the caliper to move it in. Then you could later put washers on it to move it back out if need be.
Also why do people say you can use the TT calipers on the stock 87-89 turbo 11" rotors and hubs with the stock 87-89 turbo wheels, but if you try to switch to the actual 30mm twin turbo rotor that that same wheel wont fit? I can only assume that the TT rotor would push the wheel FURTHER from the caliper. I dont understand how this could be a problem. And now you would have the correct rotor for the caliper.
Will somone please explain what it is that I am failing to see as to why it wont work?
Also, the 90 TT calipers (ones for 30mm rotors) do not fit center over the stock 88t rotor (24mm). It appears as though the 88t rotor needs to move out 2mm or the caliper needs to move in 2mm. You cant really put washers behind the rotor to bring it out (just a bad idea) so I would think you would have to take off some material from the caliper to move it in. Then you could later put washers on it to move it back out if need be.
Also why do people say you can use the TT calipers on the stock 87-89 turbo 11" rotors and hubs with the stock 87-89 turbo wheels, but if you try to switch to the actual 30mm twin turbo rotor that that same wheel wont fit? I can only assume that the TT rotor would push the wheel FURTHER from the caliper. I dont understand how this could be a problem. And now you would have the correct rotor for the caliper.
Will somone please explain what it is that I am failing to see as to why it wont work?
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