Question for Brake conversion Gurus, Do these look right? Options

[skline]

I am in the process of installing a 1971 911 front suspension. I think its a 71, anyway, I put all new bushings, bearings, brake lines, rotors, and I am using Volvo 240 brakes witht he 3 inch spacing with spacers behind them to correctly position it on the rotor. It bolts right up and I am sure it will work but my question is, it doesnt look like it sits down on the rotor like it should. The factory calipers that came with everything are the M calipers and they dont even fit over the rotor. Am I missing something here? Were the rotors for earlier cars thinner? These were for a later model car I think. I had them cross drilled. But I ordered factory vented rotors and this is what I got. How come the factory M Calipers dont fit over them? Or am I making a mountain out of a molehill? I want to be able to stop. Help!

[Eric_Shea]

What if I run the M calipers on the rear with no E brake for now and see how it goes?

Depends. That's fairly common on the board and that's the setup the factory used on a 76 930 Turbo "if" you think the pad area on those Vulvas is close to the size of an A-Caliper or an S-Caliper.

What both Brad and I are trying to say is... brake combos are tricky. I would only question the "unknown" aspect of the Vulva pad size. It's not a great idea to stick mongo calipers up front without addressing the backs. Try to go with what the factory engineers provided us with. Hence, my recommendations of pad size ratios. Brad's "Andy" experience best tells the story.

My set up is S-Calipers up front on Koni struts and M-Calipers on the rear. 911 handbrake and a "T" fitting. I haven't run the combo yet so I'm keeping my fingers crossed on the bias issue. I know it will be close (again, this is what the factory supplied on all S's, RS's and 930's through 76) but worst case I'll need to get an adjustable valve.