HOW TO DO AN ADVANCED SEARCH.

Mon Jul 08, 2013 3:56 pm by Admin


For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

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WTB: adapter for 996tt calipers to 330mm rotors

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WTB: adapter for 996tt calipers to 330mm rotors

Post  ausgeflippt951 on Sat Mar 26, 2016 8:54 am

Hi all, does anyone know of a good source for an adapter block to mount 996tt 4-pot calipers to 330mm rotors on '87 hubs?

Alternatively, does anyone have the measurements readily handy? I will do the mocking up if I have to but due to time constraints I'd much prefer to see if I can get something ready-made.

Another alternative is if anyone has a set of Big Reds/Blacks available, as these adapter blocks are much more readily accessible.

Cheers.
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Re: WTB: adapter for 996tt calipers to 330mm rotors

Post  docwyte on Sat Mar 26, 2016 10:18 am

Sunset Porsche sells the Big Blacks for pretty cheap brand new...

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Re: WTB: adapter for 996tt calipers to 330mm rotors

Post  ausgeflippt951 on Sat Mar 26, 2016 12:52 pm

Thanks. I'll give them a call; can't find anything on their website.

Would prefer to start with the 996TT calipers since they're readily available and far cheaper than anything else I've found.

I will likely just build my own bracket but it would be great to receive input from folks who have done this before.
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Re: WTB: adapter for 996tt calipers to 330mm rotors

Post  majormojo on Sat Mar 26, 2016 1:29 pm

If he hasn't made a set already, site member xschop likely has the measurements. You can contact him directly at robmott@cox.net.
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Re: WTB: adapter for 996tt calipers to 330mm rotors

Post  racertomtom on Mon Mar 28, 2016 10:46 pm


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Re: WTB: adapter for 996tt calipers to 330mm rotors

Post  FrostedFlakeJake on Tue Mar 29, 2016 8:28 am

I will likely just build my own bracket but it would be great to receive input from folks who have done this before.

As long as you have your spindle and the calipers handy it's quite simple to make them on the fly. The only thing that was kinda tricky was getting the pistons in the caliper pushed out evenly so that the caliper sat on the rotor correctly while I was lining everything up. I forgot about this when I made the first one and didn't like the fact that one "bank" of pistons was going to be much farther out than the other. Looked fishy to me so I connected the air hose to the caliper and blew the pistons out a little ways until they were evenly pushing on the rotor and then re-made the bracket.

I assume you already have the rotor centering rings?

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Re: WTB: adapter for 996tt calipers to 330mm rotors

Post  ausgeflippt951 on Fri Apr 01, 2016 4:07 pm

Thanks Jake. Yeah, I just don't have any time right now to build them myself if I can help it (which is supposedly a good thing in my line of work). I'd rather pretend I'm a 911 owner and be a checkbook mechanic for this kind of stuff. Razz

Speaking of centering rings. I just found out my source for the rings doesn't actually have any left. So now I need to figure out those.

Here's what might be easiest, honestly (assuming I can't just buy a set ready-made): if someone has a set of 996TT adapters and 330mm Cayenne centering rings and can send me the exact measurements for them, I can have my buddy machine me a set of everything.


Jake, you're doing this as well right? Do you already have everything bolted up?

Collin
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Re: WTB: adapter for 996tt calipers to 330mm rotors

Post  racertomtom on Fri Apr 01, 2016 8:19 pm

Centering rings for an 87-up turbo? Check an old rotor or hub to make sure your ID is the same.

85mm OD
7.5mm thick
71.6mm ID with a .0625” chamfer

There's an xschop drawing around here some where.
Don’t have the correct caliper adaptors

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Re: WTB: adapter for 996tt calipers to 330mm rotors

Post  ausgeflippt951 on Mon Apr 04, 2016 6:01 am

Thanks racertom, that really helps.

If anyone has the caliper adapters they can measure for me, let me know. Oddly, from what I could find of xschop's drawings, there wasn't a schematic for the final product.

This is all just a time (or lack thereof) thing....it's starting to look like I just need to get my hands dirty and just make em myself.
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Re: WTB: adapter for 996tt calipers to 330mm rotors

Post  FrostedFlakeJake on Mon Apr 04, 2016 3:38 pm

ausgeflippt951 wrote:Thanks racertom, that really helps.

If anyone has the caliper adapters they can measure for me, let me know. Oddly, from what I could find of xschop's drawings, there wasn't a schematic for the final product.

This is all just a time (or lack thereof) thing....it's starting to look like I just need to get my hands dirty and just make em myself.

Collin,

Sorry i've been sleeping on this. I'll measure the adapter tonight. I can con confirm the above posted centering rings adapter dimensions via this link: http://rennlist.com/forums/944-turbo-and-turbo-s-forum/839322-yet-another-brake-swap.html


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Re: WTB: adapter for 996tt calipers to 330mm rotors

Post  ausgeflippt951 on Mon Apr 04, 2016 4:26 pm

Hey, no problem. Really appreciate the willingness to help!


FrostedFlakeJake wrote:
ausgeflippt951 wrote:Thanks racertom, that really helps.

If anyone has the caliper adapters they can measure for me, let me know. Oddly, from what I could find of xschop's drawings, there wasn't a schematic for the final product.

This is all just a time (or lack thereof) thing....it's starting to look like I just need to get my hands dirty and just make em myself.

Collin,

Sorry i've been sleeping on this. I'll measure the adapter tonight. I can con confirm the above posted centering rings adapter dimensions via this link: http://rennlist.com/forums/944-turbo-and-turbo-s-forum/839322-yet-another-brake-swap.html

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Re: WTB: adapter for 996tt calipers to 330mm rotors

Post  FrostedFlakeJake on Tue Apr 05, 2016 9:15 am

What spindles do you have? According to Rob from that link i posted earlier the turbo spindles have a different dimension. I marked it appropriately in the drawing but I can only confirm the NA measurement since that's what I have. However, knowing Rob I would have no doubts that it's accurate.  

Take caution with these measurements. It's difficult to measure to the true center on a hole that large that's already drilled. Also the overall length could probably be larger or smaller. I don't see what clearance issues there would be, but I'm not using the dust shields on the front.

The holes that are closer together have to thread into the spindle. Since the bolt that goes there is 10mm the holes could be smaller, but I made them a little larger to increase the chance that the holes would be in the right place and the bolt would actually thread into the spindle. It looks like when Rob made these he threaded the holes for the bolts that go into the caliper. I did not do this as I didn't see a need to.

If you have late NA spindles I could make you a set. If you have different spindles you can send me them and then I can make you a set. Otherwise I would say these dimensions are accurate plus/minus a tenth or so mm. Those dimensions that could be off affect how the caliper sits on the rotor. Worse case scenario the caliper sits 0.1mm farther off or farther in on the rotor than my setup and the two banks of pistons in the caliper might be a little uneven in their extended position pushing on the caliper. Shouldn't be a deal breaker at all.

I know the isometric is pretty crude, but gives you an idea of what the final product should look like.






Last edited by FrostedFlakeJake on Tue Apr 05, 2016 8:00 pm; edited 2 times in total

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Re: WTB: adapter for 996tt calipers to 330mm rotors

Post  FrostedFlakeJake on Tue Apr 05, 2016 9:18 am

Looks like i forgot to mark the diameter of two of the holes. They are also 13.2mm or ~33/64. All the thru holes are this size.

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Re: WTB: adapter for 996tt calipers to 330mm rotors

Post  ausgeflippt951 on Tue Apr 05, 2016 1:36 pm

Jake, this is awesome -- thanks. It compliments what was banging around in my head as well.

I actually have late turbo spindles, so the spacing will be different but the good news is that I can use your adapter as a baseline and just tune the geometry accordingly.

Thanks again!
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Re: WTB: adapter for 996tt calipers to 330mm rotors

Post  FrostedFlakeJake on Tue Apr 05, 2016 2:02 pm

ausgeflippt951 wrote:Jake, this is awesome -- thanks.  It compliments what was banging around in my head as well.

I actually have late turbo spindles, so the spacing will be different but the good news is that I can use your adapter as a baseline and just tune the geometry accordingly.

Thanks again!

Collin I think i misread Robs photo in that link. Confirm your caliper bolt spacing on your spindle. All late (87+) 944 spindles are the same and have the 76mm spacing. My 944 NA spindle has a 951 part number and has the 76mm spacing. The 94mm spacing applies to the 86 turbo only. Sorry for the confusion

See rob's post, 5th one down: http://rennlist.com/forums/924-931-944-951-968-forum/489134-questions-late-spindles-and-hubs-on-an-early-offset-2.html

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Re: WTB: adapter for 996tt calipers to 330mm rotors

Post  racertomtom on Tue Apr 05, 2016 4:21 pm

FrostedFlakeJake wrote: The 94mm spacing applies to the 86 turbo only. Sorry for the confusion

See rob's post, 5th one down: http://rennlist.com/forums/924-931-944-951-968-forum/489134-questions-late-spindles-and-hubs-on-an-early-offset-2.html

Not sure but I think all turbo cars are 94mm. Otherwise the brembo 4 piston calipers wouldn't fit. Read the rest of the linked thread.

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Re: WTB: adapter for 996tt calipers to 330mm rotors

Post  FrostedFlakeJake on Tue Apr 05, 2016 8:01 pm

Good catch,

That's what i get for posting at work.

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Re: WTB: adapter for 996tt calipers to 330mm rotors

Post  ausgeflippt951 on Wed Apr 06, 2016 5:14 pm

Great, this will definitely help me get started.

So, looks like I might be doing something a little different -- I picked up a pair of aluminum hats (custom for the 951 by Coleman; picked up from an ex-racer) that are (supposedly) the same offset as the Cayenne rotors but I'm not certain. Regardless, I'll be building the adapters around these rotors.

Also snagged a pair of Aluminum 7075 hubs by Racer's Edge for a song. Really looking forward to the decreased weight on each corner.
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Re: WTB: adapter for 996tt calipers to 330mm rotors

Post  FrostedFlakeJake on Fri Apr 08, 2016 8:55 am

Nice!

I want to weigh the cayenne rotors + 996 caliper set up against my stock equipment
it feels realllllly heavy to me

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Re: WTB: adapter for 996tt calipers to 330mm rotors

Post  ausgeflippt951 on Fri Apr 08, 2016 2:38 pm

Yeah I'll weigh against the turbo setup to see what it weighs. Agreed that all this extra iron is heeeaavvvyyy.
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