Caliper Weights, Deciding where you want your un/semi-sprung weight Options

[Eric_Shea]

I finally had the time, the proper scale and all of the calipers varieties around to do a little comparison weighing. All calipers are without pins, springs and pads.

And the winners are:

Brembo Calipers = 4lbs. 6oz. (front 911 strut 3" spacing, or early 914 strut w/o caliper spacers, or late 914 strut with ClubHub 48mm pistons, #109 Pad)
(IMG:http://www.914world.com/bbs2/uploads_offsite/www.pmbperformance.com-1110-1360942664.1.jpg)

S-Calipers = 5lbs. 6oz. (front 911 strut with 3.5" spacing, 48mm pistons #45 pad)
(IMG:http://www.914world.com/bbs2/uploads_offsite/www.pmbperformance.com-1110-1360943317.1.jpg)

L-Caliper = 5lbs. 6oz. (rear early 65-68 911 caliper with 2.25" spacing 35mm pistons, #30 pad)
(IMG:http://www.914world.com/bbs2/uploads_offsite/www.pmbperformance.com-1110-1360943317.2.jpg)

Wide L-Caliper = 5lbs. 10oz. (rear early 911S 67-68, 38mm pistons, #30 pad)
(IMG:http://www.914world.com/bbs2/uploads_offsite/www.pmbperformance.com-1110-1360943318.3.jpg)

911 Rear M-Caliper = 6lbs. 2oz (rear 911 69-83, 38mm pistons, #31 pad)
(IMG:http://www.914world.com/bbs2/uploads_offsite/www.pmbperformance.com-1110-1360943318.4.jpg)

914 Rear Caliper = 6lbs. 10oz. (rear 914 All, 33mm pistons, #30 pad)
(IMG:http://www.914world.com/bbs2/uploads_offsite/www.pmbperformance.com-1110-1360943319.5.jpg)

914 Front Caliper = 6lbs. 14oz. (front 914 all, 42mm pistons, #31 pad)
(IMG:http://www.914world.com/bbs2/uploads_offsite/www.pmbperformance.com-1110-1360943319.6.jpg)

M-Caliper = 7lbs. 6oz. (911 & 914-6 Front, can be used on early 914 w/o spacers, 48mm pistons, #31 pad)
(IMG:http://www.914world.com/bbs2/uploads_offsite/www.pmbperformance.com-1110-1360943319.7.jpg)

A-Caliper = 9lbs. 2oz. (911SC all front 3.5" spacing, 48mm pistons, #45 pad)
(IMG:http://www.914world.com/bbs2/uploads_offsite/www.pmbperformance.com-1110-1360943320.8.jpg)

Wide A-Caliper = 9lbs. 4oz. (911 Carrera all 3.5" spacing, 48mm pistons, #45 pad)
(IMG:http://www.914world.com/bbs2/uploads_offsite/www.pmbperformance.com-1110-1360943320.9.jpg)
[same picture as above... just has 4mm wider spacers.]

Couple of things to note. The very lightest calipers and the very heaviest calipers share the same 48mm pistons and "almost" the same size pad. The 109 pad is the same pad as the BMW 320i... just as wide as the #45 pad but a couple of mm shorter.

Stands to reason a 3" 911T/914-6 strut with Brembo's is the lightest most effective system in this batch. Looking at the top and the bottom... you could shave almost 10lbs. of un-sprung/semi-sprung weight off your suspension and get the same performance!