Quote:
Originally Posted by 911-lightning
So if I am looking for something that is original and will bolt on at the front I need to go with floating rotors from '78-80? To look at it another way. If I want to use solid rotors at the front. What are my options? Is it possible to change the SC hub for a 930 hub? Do I need to buy aftermarket rotors that are adapted to the 930 caliper?
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there are no 1 piece options for use w/ 930 brakes and SC/Carrera fenders unless you use wheels w/ large off set.
Here's what is is used oe on a '78-80 930, 911 hub(same as used on SC) multipiece 304x32mm rotor/hat assembly the bolts to the hub, and a 21mm wheel spacer. Discard the 21mm wheel spacer and then 7ET23.3 to 8ET30mm wheels fit on an SC fender car.
here's what is used on a 930 from '80 on, 930hub which has the 21mm spacer built into it, 1 piece 304x32mm rotor that bolts to the hub, 7ET23.3 wheel
So in order to use the late 930 hub and rotor you would need a custom o/s wheel 7ET45 to 8 ET51, Now interestingly 964 and 993 and 996 used 8ET50 front wheels, but it would be exceedingly fifficult to fit a 9 or 9.5 wheels from those cars in back to match. In back you want 8 ET10.6, 9 ET15 or 9.5 ET19.5. Say you used a 964 8 ET52 CupI wheel in front then a 964 CupI in 9.5 ET68 would need ~49mm spacer to fit the back of an SC/Carrera fender car.
Quote:
Originally Posted by 911-lightning
I wondered if the offset that is created by using the stock 930 rotors could be corrected with the "wheel spacers". I probably got this all wrong but is the problem not that the integrated offset will push the rim/wheel out by 22mm?
I this is the case and you run a rim that dont have the correct "ET" so that you need to use spacers to align the wheel with your fender. Is it then possible to use a 22mm shorter spacer and still use the rotor?
I am using 993 targa at the moment. |
Ok 993targa wheels, these 7ET55 and 9ET55?
those wheels on the 930 Hub hat woud be equivalent of 7ET34 so you would need an additional spacer to bring them down to ~7ET24
in back the 9ET55 would need ~40mm spacer to bring it down to ~9ET15