Still trying to find out a cheap way to give 13" rotors to the '84's
12-22-2010, 05:15 PM
#76
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12-22-2010, 05:23 PM
#77
The 9mm steel plate will work for the single piston calp and a slew of other 4-pots if someone can confirm the maximum length of caliper to be used before B-joint interference becomes an issue. I recently put RX7 calipers on the rear of my 948 because they cleared.....
12-22-2010, 06:28 PM
#79
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Very cool
If anything this will be an easy way for some of us to fill in the 18" wheels
Sorry, but 928 brakes look tiny under 18" and 19" wheels. Even the S4/GT brakes.
If anything this will be an easy way for some of us to fill in the 18" wheels
Sorry, but 928 brakes look tiny under 18" and 19" wheels. Even the S4/GT brakes.
12-22-2010, 08:06 PM
#81
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wait a minute. now that I see the picture, i remember how it all goes together. my idea WONT work. with this idea, we would want a shorter rotor, by 9mm, not taller. We would then bolt and nut the plate to the spindle,and then just feed a bolt through the offset part, and screw into the caliper. but, are there any 50mm rotors out there? (13")?
yep, a picture is worth a 1000 words! I should have just looked at the manual. my memory was way off of the how this stuff goes together.
mk
yep, a picture is worth a 1000 words! I should have just looked at the manual. my memory was way off of the how this stuff goes together.
mk
12-22-2010, 08:17 PM
#82
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awesome! thanks
so, it looks like if the mounting spindle area is .35" we can use a flat plate, but it looks like .5" to me, so we need an angled version, like you have in the drawing you did.
then, there is a matter of the caliper body being able to clear the bracket to be set back .35 or .5".
a little more complcated than the first look.
still doable, though, right? I have a CnC machine shop ready to do a first sample. probably will do a sheet metal mock up first though.
mk
so, it looks like if the mounting spindle area is .35" we can use a flat plate, but it looks like .5" to me, so we need an angled version, like you have in the drawing you did.
then, there is a matter of the caliper body being able to clear the bracket to be set back .35 or .5".
a little more complcated than the first look.
still doable, though, right? I have a CnC machine shop ready to do a first sample. probably will do a sheet metal mock up first though.
mk
12-23-2010, 07:39 AM
#83
All you need is an L bracket and you can stick on whatever offset rotor you can find as long as it's diameter increases by at least 48mm. Easiest bracket ever. Good work with the pics/drawings. In the front suspension pic I almost missed that the caliper bolts go thru the spindle away from engine and into caliper.
12-23-2010, 08:33 AM
#84
I say 48mm because from the spindle pics I'm assuming that X and Y are both about 12 mm and you can shave about 0.5mm off the spindle edge and caliper edge to get maximum pad sweep if you are OCD....
282mm + 48mm = 330mm.....Inexpensive Cayenne rotor
282mm + 48mm = 330mm.....Inexpensive Cayenne rotor
12-23-2010, 11:12 AM
#85
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Yes, that last sketch you did is how I envision the final to look. I also realize the edge distance will be the limiting factor for minimum rotor increase. I agree that this should be a rather ease adaptor to make, and could be mocked up using a flat plate and some washers as spacers.
12-23-2010, 12:56 PM
#86
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Found the original page I was looking for. On Brembo's site you can search fro rotors by car model or you can search by size. It will bring up a pretty good CAD drawing of all the critical dimesnions. Of course the 928S is not listed, but we can measure what we need on those.
http://bremboaftermarket.com/En/Car_...earchMode=Size
http://bremboaftermarket.com/En/Car_...earchMode=Size
12-23-2010, 01:41 PM
#87
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thats a great link. also confirms that the ID of the rotors we are talking about , are 151mm for hubcentric alignment, which is the same for our S4s. question is if the early cars have the same diameter hubs.
I think the 993 which is listed, has the same rotors as the S4, but a different offset, so the other dimensions are valid. however, it has nothing to do with the early 928s.
i found my cayanne or Vw tourareg. why do they list the 330mm rotors as 32mm thickness, when I just pulled off a set that was only 27mm??????
that changes things, unless brembo increases the thickness for performance and it doesnt hurt anything vs the stock stuff
I think the 993 which is listed, has the same rotors as the S4, but a different offset, so the other dimensions are valid. however, it has nothing to do with the early 928s.
i found my cayanne or Vw tourareg. why do they list the 330mm rotors as 32mm thickness, when I just pulled off a set that was only 27mm??????
that changes things, unless brembo increases the thickness for performance and it doesnt hurt anything vs the stock stuff
Found the original page I was looking for. On Brembo's site you can search fro rotors by car model or you can search by size. It will bring up a pretty good CAD drawing of all the critical dimesnions. Of course the 928S is not listed, but we can measure what we need on those.
http://bremboaftermarket.com/En/Car_...earchMode=Size
http://bremboaftermarket.com/En/Car_...earchMode=Size
12-23-2010, 01:52 PM
#88
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12-23-2010, 02:19 PM
#89
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thats what the spec says from brembo as well, but thats for 350mm rotors (14")
the cayanne or touareg has two options, one 13 and the other 14" 330 vs 350mm, but brembo has the 330mm version at 32mm thickness, but the ones I pulled off are thin, 27mm.
the cayanne or touareg has two options, one 13 and the other 14" 330 vs 350mm, but brembo has the 330mm version at 32mm thickness, but the ones I pulled off are thin, 27mm.
12-23-2010, 07:38 PM
#90
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here are the rotors in question.
http://bremboaftermarket.com/En/Car_...IDMaster=71749
so, why was it that the front rotors off the touareg are 27mm , yet the spec calls for 32mm.
I wonder if some dumb dumb put on the rear rotors on the front. (those are also 330mm but 28mm)
anyway, i have to find the car now, and mesure the front rotors.
anyway, they have the same center alignment, bolt centers and a greater offset than the early 928s. so, It should work out.
the braket will be a solid bar, with the ends cut out for the mounting pads of the calipers that are on a greater radius position. should be an easy mod. just have to do a mock up to make sure it all fits correctly.
mk
http://bremboaftermarket.com/En/Car_...IDMaster=71749
so, why was it that the front rotors off the touareg are 27mm , yet the spec calls for 32mm.
I wonder if some dumb dumb put on the rear rotors on the front. (those are also 330mm but 28mm)
anyway, i have to find the car now, and mesure the front rotors.
anyway, they have the same center alignment, bolt centers and a greater offset than the early 928s. so, It should work out.
the braket will be a solid bar, with the ends cut out for the mounting pads of the calipers that are on a greater radius position. should be an easy mod. just have to do a mock up to make sure it all fits correctly.
mk