rear "V-caliper" vs. "M" caliper, please jump in Eric Shea Options

[Wes V]

In the process of converting to 5 lug and also rear vented rotors, there appears to be two ways to go about it. Both have been explored and written about by Eric Shea over the years. (Ya, I've done a lot of searching and reading)

One is the usage of a late model 914 rear caliper with spacers placed in the body, to get the needed clearance for the vented rotor. (as I read it; a late model ATE caliper is used and not a rare 914/6 caliper) A spacer is required between the brake rotor and hub (moving the rotor and wheel outward). The rotor (911SC) has to have it's diameter shaved down 4mm) The parking brake cable just hooks up as stock.

The other option is to use the "M" caliper from a 911 and also the parking brake assembly. Mounting the parking brake assembly requires grinding and welding on the housing. Hooking up the parking brake cable requires fabrication, but is possible (and can be found by searching this site).

Now I can think of plus and minus points for both, but I'd like to hear from others.

Wes Vann

[Eric_Shea]

You're on a roll so far.

I can use 72 and latter (which would come off of an aluminum trailing arm) if I was willing to open up the spacing of the attaching bolts

74 and later had the larger bearings and AL arms.

It seems like everybody is talking about 911SC rotors, but from what years?

Simple 911 rear rotors from 1970 through 1983 which included all the SC years (probably why people call them SC rotors)

What year rear "M" calipers do I want to use?

The later the better as they did away with the knock-back mechanism and they had the cupped pistons for better cooling (more surface area at least). Make sure they're rear M-Calipers BTW. They're all fine but, if you're looking look for 76 and later (up to 83).

In one of your posts, you talk about longer bolts to attach the calipers and also 5mm washers (spacers). Is this something you have in stock?

Lowe's item. Get the wavey-washers there as well. Get a handful of washers for spacers as well.

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